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  #1  
Old 04-07-2002, 05:20 PM
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Join Date: Apr 2002
Location: San Juan Puerto Rico
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300 D engine cap oil leak

I would appreciate you help. My 1981 300 D 70.000 m. has a leak of oil by the engine cap. The tube the extends between the air cleaner case and the lower part of the engine, leak oil at its inferior end. The base that hold the case leaks oil too.
Thank you
Juan
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  #2  
Old 04-09-2002, 12:51 AM
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Location: LEMONT-CHICAGO
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You need to obtain new grommets for the pipe. They get brittle after time and wont seal. They are not too expensive but probably need to be purchased from a Mercedes Benz dealer.
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Old 04-09-2002, 12:49 PM
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make sure the mesh screan is not pluged up.You symptoms are a engine that has plugged up breathing.
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Old 04-09-2002, 06:17 PM
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Thank you Hristo Tomov, Michael and JDUB. I have changed the o-ring at the base of air cleaner case and the engine cap. Oil leak has continued present at the inferior end of the line coming from the base of the mentioned case to the upper part of the the lower oil pan, where is the check valve. I also have oil leak around the o-ring, it is new. In my ignorance, I think the car has a problem in the Typical Positive Crankcase Ventilation, but I do not know at wich level. I wuould appreciate if some of you can tell me what is the grommets
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  #5  
Old 04-09-2002, 06:57 PM
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Location: Santa Clara, CA
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In my experience with 4 MBZ diesels, all of them exhibited SOME oil on the top of the valve cover. Gas cars probably do it just as much but the oil is so much cleaner that you don't notice it.

Obviously, this comment does not justify the presence of
more than perhaps a teaspoon of oil per week. If you have more oil than that, something is wrong and it should be fixed.
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