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NISTECH »
https://forums.nicoclub.com/nistech-u7581.html
Wed Nov 16, 2005 4:41 am
Your problem is not oil pressure. It is as they said to much pressure in the crank case. If you have a restricted flow in positive crankcase ventalation [PCV] you will have an issue with excessive pressure in there. Another posibility is blow by. If your combustion chamber is becoming worn ,at high revs, the blowby could climb drastically causing the same problem. This can be chacked by doing a cyl leak down test. anything over 10% leak down is not good.