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Crankcase Pressure? 850

posted by  PBH on  Wed Mar 7 02:47 CST 2007
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last visit: Mon Jan 2 20:34 CST 2012
[RELATED]

I had a head gasket go on my 850 (2.3 low pressure turbo) a month ago. I replaced the head gasket, the turbo, the valve stem seals, the flame trap (oil reservoir?) etc etc and sealed the engine up. It ran great after that. This morning I noticed oil blowing out around the oil fill cap. I have gone about 2,000 km since I did the head. This is a sudden problem, it did not do this until today.

The oil fill cap has a new seal, and I shouldn't have excessive crankcase pressure, so I'm wondering what might cause this?

I also think (not sure) that I saw some white smoke when I decellerated on the highway this morning. I will try to verify this later today. It is very cold here today, I don't know if this is relevant.

The engine has 200,000 km and the bores and valves are in excellent shape. The engine was like new inside when I did the head gasket. I do not think it needs head work, and since I replaced the valve stem seals I wouldn't think the valve guides are by-passing oil.

I'm thinking I should vent the engine and add in a PCV valve? Maybe tee into the rubber line from the top of the head and run that over to the intake. that would prevent the engine from building pressure.

Also, I have always had a problem with this car as far as condensation/sludge in the oil, which I attributed to my wifes short trip driving, Now I'm wondering if this is a related problem. I should also mention that the seals were gone in my turbo, which the rebuilder says is a sign of excessive crakcase pressure.

Any suggestions for me?






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