Quote:
Originally Posted by sjh
Are these only of concern for the 6-cyl engine?
Is my 602 a candidate for these problems?
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Your engine is also susceptible. As far as I know, all OM60x engines are. The original vacuum pumps were crimped on, and when they fail they can drop bearings and bits into the chain cavity and destroy the engine. Later pumps with covers held on by screws have an improved design and will not drop parts into the engine.
My '87 300TD had the original pump at 284k miles; cover was loose and leaking but pump worked fine and had not damaged the surface of the timing gear cam which drives it. It was replaced.
My '95 E300 had a failed pump when I bought it, 264k miles. I replaced the pump and also the injection pump timer, as the vacuum pump had also destroyed the surface of the timing gear cam. I was fortunate in that the pump was the newer style and did not drop parts into the engine.