Third Generation F-Body Message Boards - Oil out the dipstick tube

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Batass

09-25-2010 09:48 PM

Oil out the dipstick tube

My buddy just picked up a 305 tbi and it pukes oil out the top of the dipstick tube. Compression is 180-205. What else can we check?

skinny z

09-25-2010 09:57 PM

Re: Oil out the dipstick tube

Check the PCV system. Unless it's working properly, cylinder blowby will increase crankcase pressure to the point where oil will be forced out anyplace it can.
Nice compression pressure by the way. Bit of a spread but it's good to see 200 psi.

Batass

09-25-2010 10:01 PM

Re: Oil out the dipstick tube

There's a new breather on the passenger side, and a new pcv valve on the driver's.

skinny z

09-25-2010 10:07 PM

Re: Oil out the dipstick tube

Other than checking that the PCV is working correctly (despite the presence of the breather and the valve) my only other suggestion is a leak down test. That'll determine if that nice high compression you have is overwhelming the PCV and causing your problem.

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