Omni pressurizing crankcase

[glhman]

Quote:

Originally Posted by shadetreeshop Burnt rings. I had a 2.2 that started to push the dipstick out. then it started blowing the cam plug out (soaking the trans) until finally #2 piston gave up the ghost , blew a chunk of the upper ring land somewhere... Most likely the cause is too lean with overshots of boost, It's been my experience that TD's love Rich mixtures , and around 13lbs things tend to a little lean (read extra oil from blowby) ... Detonation will bring on your problem also..IIRC 14.5lbs is where the factory ECM stops providing fuel ?

Stock ECM/MAP setup reads up to 14.7 PSI. Wouldn't burnt rings show up on a compression test and a leak down test?

[glhman]

Any other thoughts? I've heard that if the wrong seal goes bad in the turbo, that it can be leaking boosted air into the oil return (which would explain my problem) even though the turbo itself isn't leaking/burning oil. Has anyone heard of this? BTW, its the stock T3 Garrett from a T2 Daytona.

[glhman]

Bump

[glhman]

anyone?

[glhman]

Bueler?

[glhman]

Bueler?

[phantomrt]

Have you ever experimented to find out exactly how much pressure you need to push the dipstick out of its tube? I'm sure it varies from stick to stick, but expect more than 13 PSI to push it out. I performed the experiment a couple months ago.

Do what was said before--disconnect and plug off that big huge vacuum line from the intake manifold to the PCV valve and leave the other end just sit there. If the dipstick still comes out, we have just ruled out the possibility of intake manifold pressure getting into the crankcase to cause the concern.

*IF* your camshaft timing is correct, and the compression readings are accurate, there is something wrong with that leakdown test because you should be getting much more compression than that. That also means there is something wrong with your pistons / piston rings.

Loosen the oil cap, and let it rest on the valve cover. Start the engine and goose it to about 3500 RPM. Does that oil cap stay there?