Oil drain check valve test ? - 85 300d
I've heard that the check valve in the oil pan that receives the drain pipe from the air cleaner can fail and a motor can suck up oil from the pan? First, is that true? Second, is there a way to test that check valve? Third, if it's bad, is there a write up on how to service it? Thanks a bunch!
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1998 E300D, 287k, barely broken in.
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