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1989 Mercedes-Benz 300-Class Questions & Answers
What could cause blue smoke from exhaust?
blue smoke is burning oil
I gather that you let the engine idle and when you give it rpms that there is a cloud of blue smoke
if that is the case it indicates that the valve stem seals are hard /failed and when the engine is at idle ( 15" mercury vacuum in manifold) the oil around the valves is sucked past the stem seals and into the combustion chamber
AS you have restricted use of the machine (every 3 weeks ) it is not a great problem as when you are on the road it is not happening (Only at idle )
It is repairable without removing the head if you find an accredited service shop that has experience in the procedure.
7/7/2015 2:41:28 AM •
1989...
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Answered
on Jul 07, 2015
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