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crankcase pressure doom and gloom--when is the patient terminal? 850

posted by  Paul_McBride on  Fri Mar 13 10:18 CST 2009
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last visit: Wed Apr 14 09:33 CST 2010
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Well i had the rms replaced on my 850 w/ 160K on it. The guys doing it claim that the crankcase pressure is not due to the pcv system but rather to a worn-out engine / piston blow-by and that no amount of tinkering would reduce the pressure to an appropriate level. I have always been attentive to the car in terms of oil changes, the right filters, etc., so i am a little suspicious and will probably take it somewhere else where they are willing to do a full pcv system overhall (breather replacement). Is there a level on a compression test that would indicate a "beyond-help" level, or can a fair amount of blow-by be captured by the pcv system? I would hate to give up on this otherwise spotless car...

Thanks!

Paul






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