Re: [MBZ] 1981 300CD keeps going and going and going and...
So where is this oil separator? I want to check it out and see what's goin' on with it. Do the NA cars have the baffle inside the valve cover too? Would have thought so. The separator should be inside the air cleaner housing, in the center. The giveaway is if there's an oil drain tube out the bottom or not. -- Jim
Re: [MBZ] 1981 300CD keeps going and going and going and...
I had the air cleaner housing off the car during the valve adjustment to clean it up. I didn't see an oil drain tube. I hope that there's a chance that the new owner can keep her on the road for a long time. Kevin in Hillsboro, Benzless, but still breathing diesel exhaust
[MBZ] 1981 300CD keeps going and going and going and...
I NEVER thought that I would end up with a car that has this problem, but old Granny has decided to spring it on me! She won't shut off with the key, so I have to use the stop button under the hood. Before this, there was a wire under the dash that would cause the starter to cut in and out if it was jiggled, but that's all fine now. Everything under the hood looks ok,. I thought it must be under the dash at the ignition switch, but that looks fine too. Could the ignition not be sending vac to the shutoff? My next test is to hook up a line directly to the shuttoff and try pumping a vac on it or just use the old fashion method, sucking on it. It still has a slight miss, but it's using tons of oil too, lots of blue smoke puffing out of it. It's been a good experience, but this is going to be a case of getting my money back out of it and moving on to another one with a sound engine. The glow plugs have been tested and they are working, so the hard starting, hard enough where it won't start without that bad stuff called starting fluid, is due to poor compression with only 204K miles. I should have known that she led a hard life when she came to me with a well clogged and oiled air filter and DIRRRT oil! Kevin in Hillsboro Oregon 1981 300CD 204K miles, Giesela, movin' on
Re: [MBZ] 1981 300CD keeps going and going and going and...
rumor has it that kevin wrote: I NEVER thought that I would end up with a car that has this problem, but old Granny has decided to spring it on me! She won't shut off with the key, so I have to use the stop button under the hood. Before this, there was a wire under the dash that would cause the starter to cut in and out if it was jiggled, but that's all fine now. Everything under the hood looks ok,. I thought it must be under the dash at the ignition switch, but that looks fine too. Could the ignition not be sending vac to the shutoff? By any chance, did you just replace the oil filter? I seem to knock loose at least one vacuum line every time... My next test is to hook up a line directly to the shuttoff and try pumping a vac on it or just use the old fashion method, sucking on it. Yup. Good plan. I have only changed them on the 4-cyl engines. There it's easy. I suspect it's a bit snug on a OM617. Kaleb will probably even give you a good deal on a used shutoff! -- Philip, with vacuum working again.
Re: [MBZ] 1981 300CD keeps going and going and going and...
I haven't changed the oil filter in a while. That's the first place I checked, and it was still connected there. If the shutoff valve checks out OK, I'm going to check every line to see if they're all seated tightly in their fittings and how good they are. I anticipate finding something simple that's causing the problem. Kevin in Hillsboro Oregon 1981 300CD 204K miles, Giesela
Re: [MBZ] 1981 300CD keeps going and going and going and...
It still has a slight miss, but it's using tons of oil too, lots of blue smoke puffing out of it. It's been a good experience, but this is going to be a case of getting my money back out of it and moving on to another one with a sound engine. The glow plugs have been tested and they are working, so the hard starting, hard enough where it won't start without that bad stuff called starting fluid, is due to poor compression with only 204K miles. The Chicken Wagon had all those symptoms except hard starting, and _all_ were cured by working on the crankcase breather system. It purrs like a kitten now. If there's enough oil feedback through the intake it could crap up the ring and/or valve sealing enough to ruin compression too. All I'm saying is that the engine is not necessarily ruined, though of course it could be. You have two benign sources of oil into the intake, the oil separator in the breather and the turbo. Both are easily cured. -- Jim
Re: [MBZ] 1981 300CD keeps going and going and going and...
from the valve cover into the air cleaner. It could use some type of oil separator so that oil feedback doesn't gunk up the intake which I'm sure it's doing quite well. IF I remove the oil cap for even a second or so It's already got one, doesn't it? Whether it's working correctly or not... while it's running, oil dribbles all over the valve cover with considerable blowby. Now that you mention this, most of the burned oil could be due to oil feedback since there's that much of it going on. Maybe this one is a candidate for a homemade oil separator to catch the vast quantities of oil vented from the crankcase breather. It might be worth a bit of experimentation before writing off a potentially nice coupe. The thing about oil feedback (tm!) is that if it gets bad enough to crap up the rings that just makes more blowby, exacerbating and perpetuating the problem. Your car might be a candidate for a sealing job to the baffle inside the valve cover, and it might need some attention to the separator and breather tube. The Chicken Wagon cleared up nearly completely in just a few hundred miles after its real problem, a clot of glue inside the breather tube, was corrected. Or you could try the 2l bottle idea just to get the oil going somewhere else for long enough to see if the situation starts improving with some Italian tuning action. Or I'll give you $500 for it and then _I_ will try these things! (Then I sell it for the big bucks!) -- Jim
Re: [MBZ] 1981 300CD keeps going and going and going and...
Or I'll give you $500 for it and then _I_ will try these things! (Then I sell it for the big bucks!) With all of the parts/space/knowledge that you have at your disposal, you could certainly save this one! It does have a pretty good body and interior, but it needs the ACC system reworked (PO installed toggle switch for something, and broke it off, no aux fan, no blower working). Who knows what else is going on under there? with your MB expertise, I'm sure that you could fetch at least $2500 out of it, and even more if the ACC system was sorted out. Kevin in Hillsboro Oregon 1981 300CD 204K miles, Giesela AKA Granny
Re: [MBZ] 1981 300CD keeps going and going and going and...
So where is this oil separator? I want to check it out and see what's goin' on with it. Do the NA cars have the baffle inside the valve cover too? Kevin in Hillsboro Oregon 1981 300CD 204K miles, Giesela AKA Granny
Re: [MBZ] 1981 300CD keeps going and going and going and...
I have a 1980 300CD which initially had serious problems with excessive blow-by and associated oil consumption. The prescription: Diesel purge, regular Italian tune-ups and drive it like yer pants are on fire and yer ass is catchin'. The blow-by is quite likely due to rings which are crapped up with carbon and no longer doing their job well. The regimen described above will help clean out your engine. After 10,000 miles of this regimen, our Benz no longer burns appreciable oil. Lee Jim Cathey wrote: from the valve cover into the air cleaner. It could use some type of oil separator so that oil feedback doesn't gunk up the intake which I'm sure it's doing quite well. IF I remove the oil cap for even a second or so It's already got one, doesn't it? Whether it's working correctly or not... while it's running, oil dribbles all over the valve cover with considerable blowby. Now that you mention this, most of the burned oil could be due to oil feedback since there's that much of it going on. Maybe this one is a candidate for a homemade oil separator to catch the vast quantities of oil vented from the crankcase breather. It might be worth a bit of experimentation before writing off a potentially nice coupe. The thing about oil feedback (tm!) is that if it gets bad enough to crap up the rings that just makes more blowby, exacerbating and perpetuating the problem. Your car might be a candidate for a sealing job to the baffle inside the valve cover, and it might need some attention to the separator and breather tube. The Chicken Wagon cleared up nearly completely in just a few hundred miles after its real problem, a clot of glue inside the breather tube, was corrected. Or you could try the 2l bottle idea just to get the oil going somewhere else for long enough to see if the situation starts improving with some Italian tuning action. Or I'll give you $500 for it and then _I_ will try these things! (Then I sell it for the big bucks!) -- Jim ___ http://www.okiebenz.com For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
