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#1
05-24-2013, 04:30 PM
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Help me diagnose oil leak? OM602
I've got an oil leak on my 92 300D (OM602) that's bad enough that I need to deal with it. 244k miles. Pics were taken before I cleaned it up....I'll wait and see what I see over the next few days. For quite some time I know I've had a minor leak at the stop lever. But it looks like there's a leak in addition to that.
It seems like it's most fresh at the bottom of the IP, where two surfaces come together. Any ideas? I'll report back once I see some fresh oil. Thanks.
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14 E250 Bluetec "Sinclair", Palladium Silver on Black, 153k miles 06 E320 CDI "Rutherford", Black on Tan, 171k mi, Stage 1 tune, tuned TCU 91 300D "Otis", Smoke Silver, 142k mi, wastegate conversion 19 Honda CR-V EX 61k mi Fourteen other MB's owned and sold 1961 Very Tolerant Wife Last edited by shertex; 05-25-2013 at 09:18 AM. 
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#2
05-24-2013, 06:57 PM
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Now that I think about it, maybe what makes most sense is to replace that stop lever o-ring first. Nice DYI here PeachPartsWiki: Injection Pump Stop Lever Oil Leak Fix
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14 E250 Bluetec "Sinclair", Palladium Silver on Black, 153k miles 06 E320 CDI "Rutherford", Black on Tan, 171k mi, Stage 1 tune, tuned TCU 91 300D "Otis", Smoke Silver, 142k mi, wastegate conversion 19 Honda CR-V EX 61k mi Fourteen other MB's owned and sold 1961 Very Tolerant Wife
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#3
05-25-2013, 08:24 AM
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There is a gasket under that plate with the common screws. My 2.2 was leaking from there due to past mechanic using RTV to attempt to seal the leak. I ordered the part from the dealer, replaced the gasket and no leaks.
I think pn. 001 074 01 80, had to come from Germany, cost $10.73, but stopped the leak. #382 in the diagram for my 4 banger.
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#4
05-25-2013, 09:20 AM
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Corrected a mistake...that place where I may see fresh oil is the bottom of the IP.
I replaced the stop lever o-ring....now I'll wait to see fresh drips.
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14 E250 Bluetec "Sinclair", Palladium Silver on Black, 153k miles 06 E320 CDI "Rutherford", Black on Tan, 171k mi, Stage 1 tune, tuned TCU 91 300D "Otis", Smoke Silver, 142k mi, wastegate conversion 19 Honda CR-V EX 61k mi Fourteen other MB's owned and sold 1961 Very Tolerant Wife
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