Re: [MBZ] More AC woes
leak but who knows, maybe that's all it is. I tried my tire core tool It doesn't take much to leak it all away. on it to see if I could tigten it but it would not fit around the barrel of the valve. Odd. Mine doesn't go around the barrel, it goes down inside and over the pin. Works fine on tires and AC valves. Cheap thing, too. Hemostats work, too. I've had several valves that were loose and that's all the significant leak there was. The vibration and heat cycling works them loose with time. I assume that the valve cores are not interchangable with a tire valve core, right? No, they're not exactly the same. Very similar. I think NAPA carries them. It's where the local rip-off AC shop gets their stuff. -- Jim ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
[MBZ] More AC woes
To add to the chorus of AC problems -- I've been working on getting the AC going again on my 300D. It has not worked in some time and when it threw the AC belt last year summer I did not bother replacing it. With the intention to resurrect the system, I bought some servicing equiptment from Harbor Freight (vacuum pump and manifold gauge set). Last week I put a new belt on and attached the gauges. No pressure on the high side and minimal residual pressure on the low side. I vacuumed the system for half an hour. Closing the valves, it appeared to be holding. I charged the system and got some cooling. Pressures looked good but never got really cold vent temps (I got maybe into the 50s). I did notice that a lot of the cool air was being diverted to the defrost vents because water started condensing on the windshield. I did not really use the AC much on the road because the cooling was so marginal it was more comfortable to just have the windows open. Today I put the gauges back on and there was virtually no pressure in the system. So I've got a major leak somewhere, as the entire charge was lost in about 5 days, without even having had the AC on much in that time. What's the best way to isolate the leak or identify the source? Allan -- 1983 300D ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] More AC woes
A/C sniffer or dye with goggles and UV light. Ask Kaleb about my JB Weld repair to the $600 a/c line in my SDL... Luther Allan Streib wrote: To add to the chorus of AC problems -- I've been working on getting the AC going again on my 300D. It has not worked in some time and when it threw the AC belt last year summer I did not bother replacing it. With the intention to resurrect the system, I bought some servicing equiptment from Harbor Freight (vacuum pump and manifold gauge set). Last week I put a new belt on and attached the gauges. No pressure on the high side and minimal residual pressure on the low side. I vacuumed the system for half an hour. Closing the valves, it appeared to be holding. I charged the system and got some cooling. Pressures looked good but never got really cold vent temps (I got maybe into the 50s). I did notice that a lot of the cool air was being diverted to the defrost vents because water started condensing on the windshield. I did not really use the AC much on the road because the cooling was so marginal it was more comfortable to just have the windows open. Today I put the gauges back on and there was virtually no pressure in the system. So I've got a major leak somewhere, as the entire charge was lost in about 5 days, without even having had the AC on much in that time. What's the best way to isolate the leak or identify the source? Allan -- -- Luther KB5QHUAlma, Ark '87 300SDL (281,xxx mi) '85 Ford F250 6.9 diesel (x59,xxx mi) BioBeast '82 300CD (183 kmi) '82 300D (74 kmi) getting donor engine-sold '85 300D (280,176) parts car sans engine The Accordion ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] More AC woes
With the intention to resurrect the system, I bought some servicing equipment from Harbor Freight (vacuum pump and manifold gauge set). So far, so good. I vacuumed the system for half an hour. Closing the valves, it appeared to be holding. Yep. I charged the system and got some cooling. Pressures looked good but never got really cold vent temps (I got maybe into the 50s). I did notice that a lot of the cool air was being diverted to the defrost vents because water started condensing on the windshield. Effectiveness will suck if the defrost vents don't close. You need to deal with that. Vent temps on a 123 can get down to 39 degrees on a long freeway. That's what I get with the test refrigerant, anyway. What's the best way to isolate the leak or identify the source? Get a jug of kids' bubble solution and start painting it around all the joints. Especially on the compressor manifold and the Schrader valves. Look for bubbles. -- Jim ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] More AC woes
Jim Cathey j...@windwireless.net writes: Get a jug of kids' bubble solution and start painting it around all the joints. Especially on the compressor manifold and the Schrader valves. Look for bubbles. I seem to have some leaking around the low pressure schrader valve, I saw some bubbling oil there after I removed the manifold gauge hose. It seemed to stop within a minute or so. I would guess that's not my only leak but who knows, maybe that's all it is. I tried my tire core tool on it to see if I could tigten it but it would not fit around the barrel of the valve. I assume that the valve cores are not interchangable with a tire valve core, right? Where can I find a replacement core? Is this something NAPA would be likely to stock? Stopped in a Pep Boys this afternoon and they did not have them. Allan -- 1983 300D ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] More AC woes
Allan Streib str...@cs.indiana.edu writes: Where can I find a replacement core? Is this something NAPA would be likely to stock? Stopped in a Pep Boys this afternoon and they did not have them. Would these work? Mercedes didn't use some odd size core did they? http://www.harborfreight.com/cpi/ctaf/displayitem.taf?Itemnumber=66896 Allan -- 1983 300D ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] More AC woes
any parts store should have them, and Im almost certain they are pretty much the same as tire valves Allan Streib wrote: Jim Cathey j...@windwireless.net writes: Get a jug of kids' bubble solution and start painting it around all the joints. Especially on the compressor manifold and the Schrader valves. Look for bubbles. I seem to have some leaking around the low pressure schrader valve, I saw some bubbling oil there after I removed the manifold gauge hose. It seemed to stop within a minute or so. I would guess that's not my only leak but who knows, maybe that's all it is. I tried my tire core tool on it to see if I could tigten it but it would not fit around the barrel of the valve. I assume that the valve cores are not interchangable with a tire valve core, right? Where can I find a replacement core? Is this something NAPA would be likely to stock? Stopped in a Pep Boys this afternoon and they did not have them. Allan No virus found in this incoming message. Checked by AVG - www.avg.com Version: 8.5.375 / Virus Database: 270.12.93/2205 - Release Date: 06/27/09 05:53:00 -- Kaleb C. Striplin/Claremore, OK 95 E300, 92 500SEL, 92 300SD, 92 300E 4Matic, 91 300D, 91 300E, 89 560SEL, 87 300SDL x2, 85 380SE 5.0 Euro, 85 190D, 84 190D, 84 300D euro manny, 81 240D, 80 240D, 76 240D, 76 300D, http://www.okiebenz.com -- next part -- An HTML attachment was scrubbed... URL: http://okiebenz.com/pipermail/mercedes_okiebenz.com/attachments/20090627/9eb0ca44/attachment.html ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
