hot-J

After changing my AOS housing because it cracked after installing a Souki Michi catch can, and lindsey venturi delete, I still have pressure in the crankcase blowing oil out the top of the AOS and oil fill tube. Why is this happening? There was a vent thingy in the venturi line that attaches to the top of the AOS, but after asking the advice of listers that had the same catch can, I deleted it. I should note, I am boosting it hard at 17 psi testing....... I threw the dam thing away too, so I cant just go and reinstall it. Anybody with a catch can, on thier race car please, I'd like to hear your input.

Techno Duck

Sounds dumb, but make sure you did not swap the ISV to charge pipe and AOS to j-boot hoses. Its not hard to do.

hot-J

ISV goes to the TB pipe and the AOS goes to the turbo inlet correct?

Darwantae951

A catch can will not prevent crank case pressurization (as it sounds like you were dealing with a pressure problem before the catch can install). Any idea what condition the rings/bores are in?

hot-J

as I typed this, I went out to check, I had the aos to the boost pipe to TB and the ISV to the turbo inlet..... switching them should do it.

JohnKoaWood

That is why you are pressurizing your crankcase, AND why your AOS cracked...

The SM Can had nothing to do with it...