[MBZ] 115 low oil pressure update
I pulled the valve cover and do not see anything cracked or leaking. I did start it for a couple of seconds with the cover off, oil just sort of dribbles out at about the middle cams. ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com All posts are the result of individual contributors and as such, those individuals are responsible for the content of the post. The list owner has no control over the content of the messages of each contributor.
Re: [MBZ] 115 low oil pressure
There wasn't a lot of blowby when the car left California. It started showing low oil pressure in Nevada on the way from California. It got logarithmically worse. By the time he got to OK it was to the point it is now, and it got so bad that it seemed to risky to drive it. He went to Silver Star Motors and they inspected filter and found what they said were main bearing shavings. Not sure if they drained all the oil or not. The. It was towed to meet you, Kaleb. The following are new: -Michelins and alignment -driver's seat pads (front pads available from GAHH; rear bottom pad IIRC still avail from MB $195) -windshield seal (genuine MB with correct MB flexible liquid sealant) -flex discs and centre support bearing and mount (all original MB) -front subframe mounts -transmission mount -pretty sure he did engine mounts -MB coolant -ATF and filter kit -fuel filters -belts -valve adjustment ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com All posts are the result of individual contributors and as such, those individuals are responsible for the content of the post. The list owner has no control over the content of the messages of each contributor.
[MBZ] 115 low oil pressure
I have started messing with this very nice 76 300D I bought a couple of months ago. Back story. Guy who owned it was moving from California back to Canada and was passing thru my way. When he got to about OKC, he says the oil pressure dropped. He shut it down, took it to a shop there, in fact, I think the dealer. They changed the oil allegedly and told him there was metal in the oil filter. So I get contacted and he has the car towed to Tulsa where I buy it. I have had it a couple of years now and start it up on occasion. After a few seconds of glow, it fires right up even with an almost dead battery, runs smooth right off the bat, has very very little blowby, sounds great, seems like a very healthy engine. Oil pressure pegs when cold. If you drive it and get it good and warmed up, even when driving at say, 40-50mph, the oil pressure comes off pegged, down to maybe the first line. At idle with the engine good and hot, it will drop almost to 0, but not 0, but maybe 1/3 to 1/2 the way up to the 1st line. Even though it shows low pressure, it shows no signs of it. I of course shut it off at this point. So on the dip stick, the oil seems thin to me, not your typical thick diesel black oil. I suspect maybe the oil that was put in was too thin, or it almost seems like maybe it is fuel diluted. I just drained the oil, and pulled the pan so I am staring at the oil pump, also pulled the filter. When draining the oil seemed normal but like I said, on the dipstick my unscientific observation was it was too thin. Anything else I should look for? Is there some sort of check valve or something that may need to be looked at? Should I replace the oil pump? The car seems to have a great engine except for that. Also, I see no signs at all of metal in the oil pan, oil filter etc. ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com All posts are the result of individual contributors and as such, those individuals are responsible for the content of the post. The list owner has no control over the content of the messages of each contributor.
Re: [MBZ] 115 low oil pressure
Are you sure there isn't any crap in the gauge/line somewhere? --R On 3/30/14 5:24 PM, Kaleb C. Striplin wrote: I have started messing with this very nice 76 300D I bought a couple of months ago. Back story. Guy who owned it was moving from California back to Canada and was passing thru my way. When he got to about OKC, he says the oil pressure dropped. He shut it down, took it to a shop there, in fact, I think the dealer. They changed the oil allegedly and told him there was metal in the oil filter. So I get contacted and he has the car towed to Tulsa where I buy it. I have had it a couple of years now and start it up on occasion. After a few seconds of glow, it fires right up even with an almost dead battery, runs smooth right off the bat, has very very little blowby, sounds great, seems like a very healthy engine. Oil pressure pegs when cold. If you drive it and get it good and warmed up, even when driving at say, 40-50mph, the oil pressure comes off pegged, down to maybe the first line. At idle with the engine good and hot, it will drop almost to 0, but not 0, but maybe 1/3 to 1/2 the way up to the 1st line. Even though it shows low pressure, it shows no signs of it. I of course shut it off at this point. So on the dip stick, the oil seems thin to me, not your typical thick diesel black oil. I suspect maybe the oil that was put in was too thin, or it almost seems like maybe it is fuel diluted. I just drained the oil, and pulled the pan so I am staring at the oil pump, also pulled the filter. When draining the oil seemed normal but like I said, on the dipstick my unscientific observation was it was too thin. Anything else I should look for? Is there some sort of check valve or something that may need to be looked at? Should I replace the oil pump? The car seems to have a great engine except for that. Also, I see no signs at all of metal in the oil pan, oil filter etc. ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com All posts are the result of individual contributors and as such, those individuals are responsible for the content of the post. The list owner has no control over the content of the messages of each contributor. ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com All posts are the result of individual contributors and as such, those individuals are responsible for the content of the post. The list owner has no control over the content of the messages of each contributor.
Re: [MBZ] 115 low oil pressure
I have the same issue with the 450SL. Running M1 20-50 (or 15-50). Thick when cold, no pressure at hot idle, but it goes back up on throttle. Putting it in neutral ups pressure from near 0 to almost 0.75 bar. I used some Motor Honey to see if that did any good. Not really. Short duration pressure rise, but after two months it was back to low. On Gump (72 OM 615) she kept exceptional pressure, with no drop in eight years of daily use. Then one day it just went to nothing. I found that the front cam shaft tower had sheered and it was squirting out at the failure point instead of all going where it was needed. You could have a head gasket getting ready to fail, or the pump is going to eat something and kack out metal shavings. A compression test would indicate gasket failure, where pulling and inspecting the oil pump might show something has become stuck, reducing pressure. clay On Mar 30, 2014, at 2:24 PM, Kaleb C. Striplin wrote: I have started messing with this very nice 76 300D I bought a couple of months ago. Back story. Guy who owned it was moving from California back to Canada and was passing thru my way. When he got to about OKC, he says the oil pressure dropped. He shut it down, took it to a shop there, in fact, I think the dealer. They changed the oil allegedly and told him there was metal in the oil filter. So I get contacted and he has the car towed to Tulsa where I buy it. I have had it a couple of years now and start it up on occasion. After a few seconds of glow, it fires right up even with an almost dead battery, runs smooth right off the bat, has very very little blowby, sounds great, seems like a very healthy engine. Oil pressure pegs when cold. If you drive it and get it good and warmed up, even when driving at say, 40-50mph, the oil pressure comes off pegged, down to maybe the first line. At idle with the engine good and hot, it will drop almost to 0, but not 0, but maybe 1/3 to 1/2 the way up to the 1st line. Even though it shows low pressure, it shows no signs of it. I of course shut it off at this point. So on the dip stick, the oil seems thin to me, not your typical thick diesel black oil. I suspect maybe the oil that was put in was too thin, or it almost seems like maybe it is fuel diluted. I just drained the oil, and pulled the pan so I am staring at the oil pump, also pulled the filter. When draining the oil seemed normal but like I said, on the dipstick my unscientific observation was it was too thin. Anything else I should look for? Is there some sort of check valve or something that may need to be looked at? Should I replace the oil pump? The car seems to have a great engine except for that. Also, I see no signs at all of metal in the oil pan, oil filter etc. ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com All posts are the result of individual contributors and as such, those individuals are responsible for the content of the post. The list owner has no control over the content of the messages of each contributor. ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com All posts are the result of individual contributors and as such, those individuals are responsible for the content of the post. The list owner has no control over the content of the messages of each contributor.
Re: [MBZ] 115 low oil pressure
That engine has an engine lubricated injection pump. You should send off a sample to see if there is fuel contamination in the oil (although you should be able to smell it). You should also change the oil filter and verify that it is correctly installed with the fine mesh filter on top of the bypass filter and that the filters are good. It is also possible that the relief valve in the oil pump has gotten scored or cracked, this will also give you low oil pressure. And use a known good gauge to check that the oil pressure is indeed low -- even mechanical gauges can fail! If it is low, all you need is a bearing service if the compression is good and it has very little blowby. Pull engine, remove crankshaft, get is ground, replace bearings, and drive on. Peter ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com All posts are the result of individual contributors and as such, those individuals are responsible for the content of the post. The list owner has no control over the content of the messages of each contributor.
Re: [MBZ] 115 low oil pressure
There could be. Also, it appears from some quick research there is an oil pressure relief valve that bolts into the oil pump, which also has a spring. Maybe I need to replace this. On 3/30/2014 4:44 PM, Rich Thomas wrote: Are you sure there isn't any crap in the gauge/line somewhere? --R On 3/30/14 5:24 PM, Kaleb C. Striplin wrote: I have started messing with this very nice 76 300D I bought a couple of months ago. Back story. Guy who owned it was moving from California back to Canada and was passing thru my way. When he got to about OKC, he says the oil pressure dropped. He shut it down, took it to a shop there, in fact, I think the dealer. They changed the oil allegedly and told him there was metal in the oil filter. So I get contacted and he has the car towed to Tulsa where I buy it. I have had it a couple of years now and start it up on occasion. After a few seconds of glow, it fires right up even with an almost dead battery, runs smooth right off the bat, has very very little blowby, sounds great, seems like a very healthy engine. Oil pressure pegs when cold. If you drive it and get it good and warmed up, even when driving at say, 40-50mph, the oil pressure comes off pegged, down to maybe the first line. At idle with the engine good and hot, it will drop almost to 0, but not 0, but maybe 1/3 to 1/2 the way up to the 1st line. Even though it shows low pressure, it shows no signs of it. I of course shut it off at this point. So on the dip stick, the oil seems thin to me, not your typical thick diesel black oil. I suspect maybe the oil that was put in was too thin, or it almost seems like maybe it is fuel diluted. I just drained the oil, and pulled the pan so I am staring at the oil pump, also pulled the filter. When draining the oil seemed normal but like I said, on the dipstick my unscientific observation was it was too thin. Anything else I should look for? Is there some sort of check valve or something that may need to be looked at? Should I replace the oil pump? The car seems to have a great engine except for that. Also, I see no signs at all of metal in the oil pan, oil filter etc. ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com All posts are the result of individual contributors and as such, those individuals are responsible for the content of the post. The list owner has no control over the content of the messages of each contributor. ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com All posts are the result of individual contributors and as such, those individuals are responsible for the content of the post. The list owner has no control over the content of the messages of each contributor. ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com All posts are the result of individual contributors and as such, those individuals are responsible for the content of the post. The list owner has no control over the content of the messages of each contributor.
Re: [MBZ] 115 low oil pressure
Or just clean the valve --- On Sun, Mar 30, 2014 at 4:49 PM, Kaleb C. Striplin ka...@striplin.netwrote: snip it appears from some quick research there is an oil pressure relief valve that bolts into the oil pump, which also has a spring. Maybe I need to replace this. -- OK Don NSA: The only branch of government that actually listons to US citizens! There are three kinds of men: The ones that learns by reading. The few who learn by observation. The rest of them have to pee on the electric fence for themselves. WILL ROGERS, *The Manly Wisdom of Will Rogers* 2013 F150, 18 mpg 2012 Passat TDI DSG, 44 mpg 1957 C182A, 12 mpg - but at 150 mph! ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com All posts are the result of individual contributors and as such, those individuals are responsible for the content of the post. The list owner has no control over the content of the messages of each contributor.
Re: [MBZ] 115 low oil pressure
While I have the pan off Im thinking I should replace that relief valve, new oi/filter and see what happens. I do not see any evidence of bearing damage at all. On 3/30/2014 4:45 PM, Peter Frederick wrote: That engine has an engine lubricated injection pump. You should send off a sample to see if there is fuel contamination in the oil (although you should be able to smell it). You should also change the oil filter and verify that it is correctly installed with the fine mesh filter on top of the bypass filter and that the filters are good. It is also possible that the relief valve in the oil pump has gotten scored or cracked, this will also give you low oil pressure. And use a known good gauge to check that the oil pressure is indeed low -- even mechanical gauges can fail! If it is low, all you need is a bearing service if the compression is good and it has very little blowby. Pull engine, remove crankshaft, get is ground, replace bearings, and drive on. Peter ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com All posts are the result of individual contributors and as such, those individuals are responsible for the content of the post. The list owner has no control over the content of the messages of each contributor. ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com All posts are the result of individual contributors and as such, those individuals are responsible for the content of the post. The list owner has no control over the content of the messages of each contributor.
Re: [MBZ] 115 low oil pressure
Are the small O-rings on the shaft of the oil filter cover OK? -Original Message- From: Mercedes [mailto:mercedes-boun...@okiebenz.com] On Behalf Of Kaleb C. Striplin Sent: Sunday, March 30, 2014 5:24 PM To: Mercedes Discussion List Subject: [MBZ] 115 low oil pressure I have started messing with this very nice 76 300D I bought a couple of months ago. Back story. Guy who owned it was moving from California back to Canada and was passing thru my way. When he got to about OKC, he says the oil pressure dropped. He shut it down, took it to a shop there, in fact, I think the dealer. They changed the oil allegedly and told him there was metal in the oil filter. So I get contacted and he has the car towed to Tulsa where I buy it. I have had it a couple of years now and start it up on occasion. After a few seconds of glow, it fires right up even with an almost dead battery, runs smooth right off the bat, has very very little blowby, sounds great, seems like a very healthy engine. Oil pressure pegs when cold. If you drive it and get it good and warmed up, even when driving at say, 40-50mph, the oil pressure comes off pegged, down to maybe the first line. At idle with the engine good and hot, it will drop almost to 0, but not 0, but maybe 1/3 to 1/2 the way up to the 1st line. Even though it shows low pressure, it shows no signs of it. I of course shut it off at this point. So on the dip stick, the oil seems thin to me, not your typical thick diesel black oil. I suspect maybe the oil that was put in was too thin, or it almost seems like maybe it is fuel diluted. I just drained the oil, and pulled the pan so I am staring at the oil pump, also pulled the filter. When draining the oil seemed normal but like I said, on the dipstick my unscientific observation was it was too thin. Anything else I should look for? Is there some sort of check valve or something that may need to be looked at? Should I replace the oil pump? The car seems to have a great engine except for that. Also, I see no signs at all of metal in the oil pan, oil filter etc. ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com All posts are the result of individual contributors and as such, those individuals are responsible for the content of the post. The list owner has no control over the content of the messages of each contributor. ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com All posts are the result of individual contributors and as such, those individuals are responsible for the content of the post. The list owner has no control over the content of the messages of each contributor.
Re: [MBZ] 115 low oil pressure
I will check. On 3/30/2014 4:58 PM, Scott Ritchey wrote: Are the small O-rings on the shaft of the oil filter cover OK? -Original Message- From: Mercedes [mailto:mercedes-boun...@okiebenz.com] On Behalf Of Kaleb C. Striplin Sent: Sunday, March 30, 2014 5:24 PM To: Mercedes Discussion List Subject: [MBZ] 115 low oil pressure I have started messing with this very nice 76 300D I bought a couple of months ago. Back story. Guy who owned it was moving from California back to Canada and was passing thru my way. When he got to about OKC, he says the oil pressure dropped. He shut it down, took it to a shop there, in fact, I think the dealer. They changed the oil allegedly and told him there was metal in the oil filter. So I get contacted and he has the car towed to Tulsa where I buy it. I have had it a couple of years now and start it up on occasion. After a few seconds of glow, it fires right up even with an almost dead battery, runs smooth right off the bat, has very very little blowby, sounds great, seems like a very healthy engine. Oil pressure pegs when cold. If you drive it and get it good and warmed up, even when driving at say, 40-50mph, the oil pressure comes off pegged, down to maybe the first line. At idle with the engine good and hot, it will drop almost to 0, but not 0, but maybe 1/3 to 1/2 the way up to the 1st line. Even though it shows low pressure, it shows no signs of it. I of course shut it off at this point. So on the dip stick, the oil seems thin to me, not your typical thick diesel black oil. I suspect maybe the oil that was put in was too thin, or it almost seems like maybe it is fuel diluted. I just drained the oil, and pulled the pan so I am staring at the oil pump, also pulled the filter. When draining the oil seemed normal but like I said, on the dipstick my unscientific observation was it was too thin. Anything else I should look for? Is there some sort of check valve or something that may need to be looked at? Should I replace the oil pump? The car seems to have a great engine except for that. Also, I see no signs at all of metal in the oil pan, oil filter etc. ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com All posts are the result of individual contributors and as such, those individuals are responsible for the content of the post. The list owner has no control over the content of the messages of each contributor. ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com All posts are the result of individual contributors and as such, those individuals are responsible for the content of the post. The list owner has no control over the content of the messages of each contributor. ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com All posts are the result of individual contributors and as such, those individuals are responsible for the content of the post. The list owner has no control over the content of the messages of each contributor.
Re: [MBZ] 115 low oil pressure
Did you check the pressure with a mechanical gauge? Oil pressure senders do fail. That would have possibly precluded the need to be dropping the pan and other such stuff. Dan Sent from my iPad On Mar 30, 2014, at 5:49 PM, Kaleb C. Striplin ka...@striplin.net wrote: There could be. Also, it appears from some quick research there is an oil pressure relief valve that bolts into the oil pump, which also has a spring. Maybe I need to replace this. On 3/30/2014 4:44 PM, Rich Thomas wrote: Are you sure there isn't any crap in the gauge/line somewhere? --R On 3/30/14 5:24 PM, Kaleb C. Striplin wrote: I have started messing with this very nice 76 300D I bought a couple of months ago. Back story. Guy who owned it was moving from California back to Canada and was passing thru my way. When he got to about OKC, he says the oil pressure dropped. He shut it down, took it to a shop there, in fact, I think the dealer. They changed the oil allegedly and told him there was metal in the oil filter. So I get contacted and he has the car towed to Tulsa where I buy it. I have had it a couple of years now and start it up on occasion. After a few seconds of glow, it fires right up even with an almost dead battery, runs smooth right off the bat, has very very little blowby, sounds great, seems like a very healthy engine. Oil pressure pegs when cold. If you drive it and get it good and warmed up, even when driving at say, 40-50mph, the oil pressure comes off pegged, down to maybe the first line. At idle with the engine good and hot, it will drop almost to 0, but not 0, but maybe 1/3 to 1/2 the way up to the 1st line. Even though it shows low pressure, it shows no signs of it. I of course shut it off at this point. So on the dip stick, the oil seems thin to me, not your typical thick diesel black oil. I suspect maybe the oil that was put in was too thin, or it almost seems like maybe it is fuel diluted. I just drained the oil, and pulled the pan so I am staring at the oil pump, also pulled the filter. When draining the oil seemed normal but like I said, on the dipstick my unscientific observation was it was too thin. Anything else I should look for? Is there some sort of check valve or something that may need to be looked at? Should I replace the oil pump? The car seems to have a great engine except for that. Also, I see no signs at all of metal in the oil pan, oil filter etc. ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com All posts are the result of individual contributors and as such, those individuals are responsible for the content of the post. The list owner has no control over the content of the messages of each contributor. ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com All posts are the result of individual contributors and as such, those individuals are responsible for the content of the post. The list owner has no control over the content of the messages of each contributor. ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com All posts are the result of individual contributors and as such, those individuals are responsible for the content of the post. The list owner has no control over the content of the messages of each contributor. ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com All posts are the result of individual contributors and as such, those individuals are responsible for the content of the post. The list owner has no control over the content of the messages of each contributor.
Re: [MBZ] 115 low oil pressure
I have to disagree with pulling the crank and having it ground. Two reasons..First off, it's probably fine. Put a micrometer on it and see. I've been in a few engines, and not found one yet that had a bad crank. You'll find the bearings are bad. Worn. The crank almost never fails. So you replace the bearings with standard bores and you're good to go for another quarter million or so. Second, the crank is heat treated, so grinding it is really hard, and it produces a journal that will fail in a short amount of time unless you re heat treat it. This is hearsay, I have not tested a journal for heat treating, but I believe the hearsay (c: .. worst one I ever took apart had babbet 'attached' to the journal. It had separated from the cap, then ground a really nice groove in the cap as it rotated. I'm sure it was toasty warm in there. I burnished off the babbet with a piece of emory cloth, miked the journal and put it back together. Next to worst was my trusty 81 300TD that had been run short of oil by it's PO. I bought it non running.. the babbet was scored horribly, the first main bearing was almost destroyed. It would rotate but not run. New rings, new babbet, and a car that was dependable for the remainder of my ownership, about 100K .. I was absolutely amazed that the journals were not only within MB wear limits, they were within the manufacturing limits of new journals posted in the manual. This car had half million on it, plus or minus a 100K.. The first bearing will be the worst, in general. You can reach and inspect this one right now.. since you can see the pump, the cap is right there beside it. You can pull the cap, if you must, and inspect the babbet. You can get close to the proper measurement on the journal if you are careful, and your digital electronic caliper has really sharp points (c: ... I doubt it's worth it but a visual inspection might calm your fears. The first one is worst for ?? reasons ( gravity, forward motion, who knows.. not me )... this has been my experience. The cap is normally the worst babbet half since it is countering the thrust from the piston. You can also change the pump in the situation you have now, but it's not worth the effort, IMO. Nor the cost. I changed the pump on an M110 once, and the good cost for all the parts, pump, gears, etc, was in the $500 range and that was in the mid 90's. And I doubt your's is bad. On another whole tack... It sounds from the gauge that it's 'close' to normal operating parameters. The oil may be thin.. it may have been changed by a non-believer with 5W20 or whatever to make it look thin on the stick, but it sounds exactly like my cars.. pegs when cold, runs under the mark when warm and idling.. what's not to love?? Dropping to the first line when hot might be thin oil. Dump the crap in it, check the filters as suggested, put in some real diesel oil, and see what it does. Oh, and putting a real gauge on it might not hurt either, making you feel better (c: .. You might be 'making oil' .. ( geeze, am I showing my age here or what ?? ) .. but I bet it's just a diesel that wants to be loved. Get to driving it. (c: Worst case is pulling the engine, replacing the babbet, and putting it back together again. Total $ if you do the job is under $100. Most of that is gaskets and such garbage. I think the bearings were in the $40 range last time I got them. On Sunday, March 30, 2014 5:46 PM, Peter Frederick psf...@earthlink.net wrote: That engine has an engine lubricated injection pump. You should send off a sample to see if there is fuel contamination in the oil (although you should be able to smell it). You should also change the oil filter and verify that it is correctly installed with the fine mesh filter on top of the bypass filter and that the filters are good. It is also possible that the relief valve in the oil pump has gotten scored or cracked, this will also give you low oil pressure. And use a known good gauge to check that the oil pressure is indeed low -- even mechanical gauges can fail! If it is low, all you need is a bearing service if the compression is good and it has very little blowby. Pull engine, remove crankshaft, get is ground, replace bearings, and drive on. Peter ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com All posts are the result of individual contributors and as such, those individuals are responsible for the content of the post. The list owner has no control over the content of the messages of each contributor. ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to:
Re: [MBZ] 115 low oil pressure
It seems to me it is almost normal, and would not take much to raise the pressure. I think I am going to replace that pressure relief valve and put it back together and see what happens. On 3/30/2014 5:16 PM, Richard Hattaway wrote: I have to disagree with pulling the crank and having it ground. Two reasons..First off, it's probably fine. Put a micrometer on it and see. I've been in a few engines, and not found one yet that had a bad crank. You'll find the bearings are bad. Worn. The crank almost never fails. So you replace the bearings with standard bores and you're good to go for another quarter million or so. Second, the crank is heat treated, so grinding it is really hard, and it produces a journal that will fail in a short amount of time unless you re heat treat it. This is hearsay, I have not tested a journal for heat treating, but I believe the hearsay (c: .. worst one I ever took apart had babbet 'attached' to the journal. It had separated from the cap, then ground a really nice groove in the cap as it rotated. I'm sure it was toasty warm in there. I burnished off the babbet with a piece of emory cloth, miked the journal and put it back together. Next to worst was my trusty 81 300TD that had been run short of oil by it's PO. I bought it non running.. the babbet was scored horribly, the first main bearing was almost destroyed. It would rotate but not run. New rings, new babbet, and a car that was dependable for the remainder of my ownership, about 100K .. I was absolutely amazed that the journals were not only within MB wear limits, they were within the manufacturing limits of new journals posted in the manual. This car had half million on it, plus or minus a 100K.. The first bearing will be the worst, in general. You can reach and inspect this one right now.. since you can see the pump, the cap is right there beside it. You can pull the cap, if you must, and inspect the babbet. You can get close to the proper measurement on the journal if you are careful, and your digital electronic caliper has really sharp points (c: ... I doubt it's worth it but a visual inspection might calm your fears. The first one is worst for ?? reasons ( gravity, forward motion, who knows.. not me )... this has been my experience. The cap is normally the worst babbet half since it is countering the thrust from the piston. You can also change the pump in the situation you have now, but it's not worth the effort, IMO. Nor the cost. I changed the pump on an M110 once, and the good cost for all the parts, pump, gears, etc, was in the $500 range and that was in the mid 90's. And I doubt your's is bad. On another whole tack... It sounds from the gauge that it's 'close' to normal operating parameters. The oil may be thin.. it may have been changed by a non-believer with 5W20 or whatever to make it look thin on the stick, but it sounds exactly like my cars.. pegs when cold, runs under the mark when warm and idling.. what's not to love?? Dropping to the first line when hot might be thin oil. Dump the crap in it, check the filters as suggested, put in some real diesel oil, and see what it does. Oh, and putting a real gauge on it might not hurt either, making you feel better (c: .. You might be 'making oil' .. ( geeze, am I showing my age here or what ?? ) .. but I bet it's just a diesel that wants to be loved. Get to driving it. (c: Worst case is pulling the engine, replacing the babbet, and putting it back together again. Total $ if you do the job is under $100. Most of that is gaskets and such garbage. I think the bearings were in the $40 range last time I got them. On Sunday, March 30, 2014 5:46 PM, Peter Frederick psf...@earthlink.net wrote: That engine has an engine lubricated injection pump. You should send off a sample to see if there is fuel contamination in the oil (although you should be able to smell it). You should also change the oil filter and verify that it is correctly installed with the fine mesh filter on top of the bypass filter and that the filters are good. It is also possible that the relief valve in the oil pump has gotten scored or cracked, this will also give you low oil pressure. And use a known good gauge to check that the oil pressure is indeed low -- even mechanical gauges can fail! If it is low, all you need is a bearing service if the compression is good and it has very little blowby. Pull engine, remove crankshaft, get is ground, replace bearings, and drive on. Peter ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com All posts are the result of individual contributors and as such, those individuals are responsible for the content of the post. The list owner has no control over the content of the messages of each
Re: [MBZ] 115 low oil pressure
On Sun, 30 Mar 2014 17:24:17 -0500 Kaleb C. Striplin ka...@striplin.net wrote: It seems to me it is almost normal, and would not take much to raise the pressure. I think I am going to replace that pressure relief valve and put it back together and see what happens. Isn't the spec 0.5 bar at hot idle? Craig ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com All posts are the result of individual contributors and as such, those individuals are responsible for the content of the post. The list owner has no control over the content of the messages of each contributor.
Re: [MBZ] 115 low oil pressure
Yea, but it is a little lower than that. On 3/30/2014 5:58 PM, Craig wrote: On Sun, 30 Mar 2014 17:24:17 -0500 Kaleb C. Striplin ka...@striplin.net wrote: It seems to me it is almost normal, and would not take much to raise the pressure. I think I am going to replace that pressure relief valve and put it back together and see what happens. Isn't the spec 0.5 bar at hot idle? Craig ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com All posts are the result of individual contributors and as such, those individuals are responsible for the content of the post. The list owner has no control over the content of the messages of each contributor. ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com All posts are the result of individual contributors and as such, those individuals are responsible for the content of the post. The list owner has no control over the content of the messages of each contributor.
Re: [MBZ] 115 low oil pressure
On Sun, 30 Mar 2014 17:59:05 -0500 Kaleb C. Striplin ka...@striplin.net wrote: Yea, but it is a little lower than that. Ah. OK. Craig P.S. How about answering my question about your Internet service? Kaleb, How is your satellite Internet service doing? Are you still happy with it? Who is the provider (I can't find any record of it, though I was sure I wrote it down somewhere ...)? Craig ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com All posts are the result of individual contributors and as such, those individuals are responsible for the content of the post. The list owner has no control over the content of the messages of each contributor.
Re: [MBZ] 115 low oil pressure
This car has a manual gauge, but I suppose a manual gauge can fail also. Sent from my iPhone On Mar 30, 2014, at 5:03 PM, Dan Penoff d...@penoff.com wrote: Did you check the pressure with a mechanical gauge? Oil pressure senders do fail. That would have possibly precluded the need to be dropping the pan and other such stuff. Dan Sent from my iPad On Mar 30, 2014, at 5:49 PM, Kaleb C. Striplin ka...@striplin.net wrote: There could be. Also, it appears from some quick research there is an oil pressure relief valve that bolts into the oil pump, which also has a spring. Maybe I need to replace this. On 3/30/2014 4:44 PM, Rich Thomas wrote: Are you sure there isn't any crap in the gauge/line somewhere? --R On 3/30/14 5:24 PM, Kaleb C. Striplin wrote: I have started messing with this very nice 76 300D I bought a couple of months ago. Back story. Guy who owned it was moving from California back to Canada and was passing thru my way. When he got to about OKC, he says the oil pressure dropped. He shut it down, took it to a shop there, in fact, I think the dealer. They changed the oil allegedly and told him there was metal in the oil filter. So I get contacted and he has the car towed to Tulsa where I buy it. I have had it a couple of years now and start it up on occasion. After a few seconds of glow, it fires right up even with an almost dead battery, runs smooth right off the bat, has very very little blowby, sounds great, seems like a very healthy engine. Oil pressure pegs when cold. If you drive it and get it good and warmed up, even when driving at say, 40-50mph, the oil pressure comes off pegged, down to maybe the first line. At idle with the engine good and hot, it will drop almost to 0, but not 0, but maybe 1/3 t o 1/2 the way up to the 1st line. Even though it shows low pressure, it shows no signs of it. I of course shut it off at this point. So on the dip stick, the oil seems thin to me, not your typical thick diesel black oil. I suspect maybe the oil that was put in was too thin, or it almost seems like maybe it is fuel diluted. I just drained the oil, and pulled the pan so I am staring at the oil pump, also pulled the filter. When draining the oil seemed normal but like I said, on the dipstick my unscientific observation was it was too thin. Anything else I should look for? Is there some sort of check valve or something that may need to be looked at? Should I replace the oil pump? The car seems to have a great engine except for that. Also, I see no signs at all of metal in the oil pan, oil filter etc. ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com All posts are the result of individual contributors and as such, those individuals are responsible for the content of the post. The list owner has no control over the content of the messages of each contributor. ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com All posts are the result of individual contributors and as such, those individuals are responsible for the content of the post. The list owner has no control over the content of the messages of each contributor. ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com All posts are the result of individual contributors and as such, those individuals are responsible for the content of the post. The list owner has no control over the content of the messages of each contributor. ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com All posts are the result of individual contributors and as such, those individuals are responsible for the content of the post. The list owner has no control over the content of the messages of each contributor. ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com All posts are the result of individual contributors and as such, those individuals are responsible for the content of the post. The list owner has no control over the content of the messages of each contributor.
Re: [MBZ] 115 low oil pressure
I did not see your question, but I was using exede and it was fine, no speed issues. Uverse became available and it is faster, cheaper and no data limits so I switched to that Sent from my iPhone On Mar 30, 2014, at 6:06 PM, Craig diese...@pisquared.net wrote: On Sun, 30 Mar 2014 17:59:05 -0500 Kaleb C. Striplin ka...@striplin.net wrote: Yea, but it is a little lower than that. Ah. OK. Craig P.S. How about answering my question about your Internet service? Kaleb, How is your satellite Internet service doing? Are you still happy with it? Who is the provider (I can't find any record of it, though I was sure I wrote it down somewhere ...)? Craig ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com All posts are the result of individual contributors and as such, those individuals are responsible for the content of the post. The list owner has no control over the content of the messages of each contributor. ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com All posts are the result of individual contributors and as such, those individuals are responsible for the content of the post. The list owner has no control over the content of the messages of each contributor.
Re: [MBZ] 115 low oil pressure
If you still have the old oil, you could send a sample to Larry for testing -- Max Dillon Charleston, SC Original Message From: Kaleb C. Striplin ka...@striplin.net Sent: March 30, 2014 5:51:59 PM EDT To: Mercedes Discussion List mercedes@okiebenz.com Subject: Re: [MBZ] 115 low oil pressure While I have the pan off Im thinking I should replace that relief valve, new oi/filter and see what happens. I do not see any evidence of bearing damage at all. On 3/30/2014 4:45 PM, Peter Frederick wrote: That engine has an engine lubricated injection pump. You should send off a sample to see if there is fuel contamination in the oil (although you should be able to smell it). You should also change the oil filter and verify that it is correctly installed with the fine mesh filter on top of the bypass filter and that the filters are good. It is also possible that the relief valve in the oil pump has gotten scored or cracked, this will also give you low oil pressure. And use a known good gauge to check that the oil pressure is indeed low -- even mechanical gauges can fail! If it is low, all you need is a bearing service if the compression is good and it has very little blowby. Pull engine, remove crankshaft, get is ground, replace bearings, and drive on. Peter ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com All posts are the result of individual contributors and as such, those individuals are responsible for the content of the post. The list owner has no control over the content of the messages of each contributor. ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com All posts are the result of individual contributors and as such, those individuals are responsible for the content of the post. The list owner has no control over the content of the messages of each contributor. ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com All posts are the result of individual contributors and as such, those individuals are responsible for the content of the post. The list owner has no control over the content of the messages of each contributor.
Re: [MBZ] 115 low oil pressure
Yea, I still have it but I am not going to fool with testing it unless I still have the problem after cleaning/replacing the pressure valve and all that. On 3/30/2014 6:19 PM, Max Dillon wrote: If you still have the old oil, you could send a sample to Larry for testing ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com All posts are the result of individual contributors and as such, those individuals are responsible for the content of the post. The list owner has no control over the content of the messages of each contributor.
Re: [MBZ] 115 low oil pressure
I have the same issue with the 450SL. Running M1 20-50 (or 15-50). Thick when cold, no pressure at hot idle, but it goes back up on throttle. Putting it in neutral ups pressure from near 0 to almost 0.75 bar. I used some Motor Honey to see if that did any good. Not really. Short duration pressure rise, but after two months it was back to low. On Gump (72 OM 615) she kept exceptional pressure, with no drop in eight years of daily use. Then one day it just went to nothing. I found that the front cam shaft tower had sheered and it was squirting out at the failure point instead of all going where it was needed. You could have a head gasket getting ready to fail, or the pump is going to eat something and kack out metal shavings. A compression test would indicate gasket failure, where pulling and inspecting the oil pump might show something has become stuck, reducing pressure. clay Also possible, though rare, that the spring that sets the oil pressure has failed. ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com All posts are the result of individual contributors and as such, those individuals are responsible for the content of the post. The list owner has no control over the content of the messages of each contributor.
Re: [MBZ] 115 low oil pressure
Yes, test real Oil pressure with a reliable gauge. Instruments have been know to lie. Are you sure there isn't any crap in the gauge/line somewhere? --R On 3/30/14 5:24 PM, Kaleb C. Striplin wrote: I have started messing with this very nice 76 300D I bought a couple of months ago. ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com All posts are the result of individual contributors and as such, those individuals are responsible for the content of the post. The list owner has no control over the content of the messages of each contributor.
Re: [MBZ] 115 low oil pressure
It has a mechanical gauge that is not that accurate. Check it with a good, accurate Gauge. Stewart Warner used to be the reliable one. This car has a manual gauge, but I suppose a manual gauge can fail also. Sent from my iPhone On Mar 30, 2014, at 5:03 PM, Dan Penoff d...@penoff.com wrote: Did you check the pressure with a mechanical gauge? Oil pressure senders do fail. That would have possibly precluded the need to be dropping the pan and other such stuff. Dan Sent from my iPad On Mar 30, 2014, at 5:49 PM, Kaleb C. Striplin ka...@striplin.net wrote: There could be. Also, it appears from some quick research there is an oil pressure relief valve that bolts into the oil pump, which also has a spring. Maybe I need to replace this. On 3/30/2014 4:44 PM, Rich Thomas wrote: Are you sure there isn't any crap in the gauge/line somewhere? --R On 3/30/14 5:24 PM, Kaleb C. Striplin wrote: I have started messing with this very nice 76 300D I bought a couple of months ago. Back story. Guy who owned it was moving from California back to Canada and was passing thru my way. When he got to about OKC, he says the oil pressure dropped. He shut it down, took it to a shop there, in fact, I think the dealer. They changed the oil allegedly and told him there was metal in the oil filter. So I get contacted and he has the car towed to Tulsa where I buy it. I have had it a couple of years now and start it up on occasion. After a few seconds of glow, it fires right up even with an almost dead battery, runs smooth right off the bat, has very very little blowby, sounds great, seems like a very healthy engine. Oil pressure pegs when cold. If you drive it and get it good and warmed up, even when driving at say, 40-50mph, the oil pressure comes off pegged, down to maybe the first line. At idle with the engine good and hot, it will drop almost to 0, but not 0, but maybe 1/3 to 1/2 the way up to the 1st line. Even though it shows low pressure, it shows no signs of it. I of course shut it off at this point. So on the dip stick, the oil seems thin to me, not your typical thick diesel black oil. I suspect maybe the oil that was put in was too thin, or it almost seems like maybe it is fuel diluted. I just drained the oil, and pulled the pan so I am staring at the oil pump, also pulled the filter. When draining the oil seemed normal but like I said, on the dipstick my unscientific observation was it was too thin. Anything else I should look for? Is there some sort of check valve or something that may need to be looked at? Should I replace the oil pump? The car seems to have a great engine except for that. Also, I see no signs at all of metal in the oil pan, oil filter etc. ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com All posts are the result of individual contributors and as such, those individuals are responsible for the content of the post. The list owner has no control over the content of the messages of each contributor. ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com All posts are the result of individual contributors and as such, those individuals are responsible for the content of the post. The list owner has no control over the content of the messages of each contributor. ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com All posts are the result of individual contributors and as such, those individuals are responsible for the content of the post. The list owner has no control over the content of the messages of each contributor. ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com All posts are the result of individual contributors and as such, those individuals are responsible for the content of the post. The list owner has no control over the content of the messages of each contributor. ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com All posts are the result of individual contributors and as such, those individuals are responsible for the content of the post. The list
