Engine/Transmission (1994 - 1998) Crankcase pressure (Oil Leak UPDATE)

[BIG C]

Turned out the rear main seal was dry as a bone. The rear of the oil pan is leaking. Dropped the pan and put a new pan seal in. Got it all buttoned up. Took it for a little drive, all was good. Drove back home (90 miles) now its leaking again.



Someone explain the vacuum pump pressurizing the crankcase to me again. This might be a possibilty? If so what other symptoms should I look for.



Also maybe I running too much boost and its blowing by the rings and pressurizing the oil pan?? Although on the way home I was never over 20-25psi. Mostly under 15psi the majority of the time. Other symptoms would be??



All these leaks are starting to irritate me. Especially when about 10 hrs of busted knuckles was all for nothing.



Thanks,

Chad

 

[WDixon27]

the vacuum pump exhausts into the crankcase and normally it doesn't have any real flow, but if you have a vacuum leak the pump has something to move and a large enough leak can overcome the vent pressurizing the crankcase

Someone explain the vacuum pump pressurizing the crankcase to me again. This might be a possibilty? If so what other symptoms should I look for.

 

[bmoeller]

Is the blow-by tube free and clear?

 

[NHays]

Yeah, check the blowby tube.

 

[BIG C]

The blow by tube is free and clear down below. I will have to check on the end up by the block. Should I "feel" air coming out of the tube? Its pretty oily but it looks like it is only on the outside from the oil pan leak. The inside looks clean. How do I make sure the tube isnt plugged up in the lifter cover??



Thanks!

 

[KingS]

hey there if you solve this problem please reply how and what it was I posted with the same type problem last week and not a single reply to help me and I still havn't found my problem yet.

 

[Highfinance97]

Ya me 3 :-laf Too much blow by??



Michael