ramsack
15+ Year Contributor
- 3,288
- 23
- Dec 27, 2007
-
West Lawn,
Pennsylvania
Common sense would say that if have great enough blowby to double oil pressure then you have bigger things to worry about, like how the valve cover wasn't blown off the top of the engine. Even a malfunctioning PCV valve would still let blowby vent to the other port on the cover. Air and liquid pressure is not the same numberwise too. If you pressureize a tank of oil with 15 psi of air you will not have 15 psi of oil pressure. It will be a lot less. That would be some insane blowby to create that much oil pressure. Probably direct cylinder pressure. The car wouldn't run.