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> too much crank case pressure...., how can you tell?
jr91472
post Jul 8 2005, 02:50 PM
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So a little history. I am struggling with a rear main seal that doesn't want to stop leaking oil (sounds like I am not the only one).

I am down to two possibilities (that I know of)
1. excessive wear on the flywheel hub
2. excessive case pressure

Focusing on #2, how can you determine if there is too much pressure?

One mechanic told me that one test is to simply place the oil filler cap on the oil fill neck (without tighting) while the car is idling. If the cap blows off = too much pressure. Anyone heard of this?

Ultimately, what is the cause of excessive case pressure? and how do you fix it?

sorry for all the newbie questions, but these things keep me awake at nite......

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