oil spew when in boost

[420a-t]

I've searched for numerous hours on this subject and I can't seem to find anything to help me. All mods in profile are up to date. I am currently running 22 psi. Everytime I hit full boost, oil spews out of my dipstick. I've done everything I can think of for it- cleaned pcv valve (still leaked a little), replaced pcv valve, got a catch can for both the pcv and the intake to VC, upgraded check valve from usplastics.com in line with the stock pcv and catch can, crimped the dipstick, new dipstick, blah blah blah...

I'm still getting oil everywhere! I dont know what to do now. I have good compression on all cylinders too, so I don't think it's blowby either. Thanks for any suggestions.

 

[kenamond]

I've searched for numerous hours on this subject and I can't seem to find anything to help me. All mods in profile are up to date. I am currently running 22 psi. Everytime I hit full boost, oil spews out of my dipstick. I've done everything I can think of for it- cleaned pcv valve (still leaked a little), replaced pcv valve, got a catch can for both the pcv and the intake to VC, upgraded check valve from usplastics.com in line with the stock pcv and catch can, crimped the dipstick, new dipstick, blah blah blah...

I'm still getting oil everywhere! I dont know what to do now. I have good compression on all cylinders too, so I don't think it's blowby either. Thanks for any suggestions.

Have you done a boost leak test? Might be intake valve stem seals. They're outside the combustion chamber, so they don't show up on a compression test, but they will pressurize above the head and in the crankcase (through the oil return passages) when boosting. And I'd make sure your PCV system is functioning properly. The whole intake should hold ~25psi in the test leaking down less than 1psi every few seconds. And the PCV valve should open and let blowby gassed into the IM under vaccuum. And the VC breather should be free to vent to the intake pipe (or to atmosphere, but that's not ideal). Pull the oil cap when you do the boost leak test and listen.

 

[420a-t]

Sounds good i'll try the boost leak test. My vc breather is inclosed with the catch can inline, so i know that is good. I'll try and look at the pcv system one more time too. What do you mean the oil return passages? Thanks for the response.


Josh