[Onefast99gsx]

Shane- Found this stuff on dsmlinks website: Some don't consider it a problem However, I still smell burning oil out the tailpipe. My problem is seems to be a true oil seal issue.


I had this same question about a month back and this is the reply I got from FP

"Nothin unusual about the pressure going form the compressor housing into the crankcase. The seal is supposed to hold back a oil mist from leaving the bearing housing under normal operating conditions, if air is going from the compressor housing into the bearing housing then oil isn’t going to be coming out of the bearing housing.



This concern by itself doesn’t warrant rebuilding the turbo.



Regards

Robert Young
"

The issue from my research is that when the car is running the oil pressure on the seal is higher than the air pressure seen on the turbo side so air won't get past it. When you do a boost leak check the pressure is high and there is no oil pressure on the seal so the air goes past it into the crankcase.


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Turbo seals look like piston rings. They aren't designed to seal against air pressure without oil pressure behind them.

Dave

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