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'84 733i, suddenly smoking, oil on air filter (archive)
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Posted by Tim Orling on March 08, 2001 at 16:21:55:

A couple days ago, I went out to start up my '84 733i and a big cloud of white or blue-white smoke came out. It has NEVER smoked before. As I was on my way to change the oil anyway, I did so. It did not seem to have water in it, at least it didn't separate out at all. I use Castrol GTX 20W50 oil. I checked the air filter, and it has oil on it. I traced the source of this oil back through the mass air flow meter and so on. A mechanic suggested my valve stem guides are leaking and a possible vacuum leak problem. It seems odd to me that this happened OVERNIGHT. The engine seems to run fine. No weird noises. Suggestions?

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