12th February 2002, 02:14
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'88 M5 - Oil in throttle body air box
I am trying to help a friend who owns a beautiful 1988 M5.
There appears to be an air expansion box that attaches to the six throttle bodies and has source air from the regular air box.
This box is LOADED with engine oil which of course is causing major amounts of blue smoke out the exhaust. There also appears to be an electronically controlled valve (PCV) just below the #2 and #3 throttle bodies that I believe may be the source of allowing enough vaccum to draw oil out of the valve cover and into this air expansion box and then directly right into the throttle bodies.
We have no manual (same on us) but are seeking the insight from you all.
One call to a BMW Service writter leads me to believe that this is an electronically controlled PCV valve and that it is bad but yet a call to the parts department the guy there states that this is an Idle Control Valve.
In either case, can this cause the large amounts of oil into this airbox?