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Crankcase pressure despite clean ventilation system

posted by  xluke on  Tue Sep 30 10:08 CST 2008
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last visit: Fri Jan 16 15:48 CST 2009
[RELATED]

Hello,
I suspect that I have high crankcase pressure in my '94 940 ('88 240 engine) because smoke and oil comes out of the dipstick when it is removed and the car is running at idle, and increases as I give the car throttle. Also, my metal oil cap (from an older volvo) also vibrates when loosened as per the FAQ. Feeling with my hand over the oil fill hole, there may be a very minimal amount of vacuum. I can not feel any vacuum over the dipstick tube when I remove the dipstick and cover it with my finger.

I just finished cleaning everything from the oil seperator ('breather box') all the way to the brass nipple on the intake with no change in the above symptoms.

No other oil leaks (yet?)

Any ideas?

Thanks!





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