03-05-2008, 08:20 PM
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Location: Certified Okie
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Join Date: Apr 2005
Posts: 8,804
Mein Auto: E30 S52 / S52 M roady
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Another spot is the oil cap. Pretty much you need to rev your engine and listen for the hiss. My indication that I had a leak came in the form of poor idle and the infamous 1222 CEL code. Idle I discovered was part vacuum leak but more Bosch plat +4 plugs, M20's don't like them. the other was a O ring I forgot on the oil drain back tube when I did the head. And boy is that fun to do without removing the intake....
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