Ok so after replacing TB Shaft seals, new Injector seals, All new vacuum line's. I seem to still have a leak after scratching my head for hours I realized it was not the valve's in the head I was hearing but the PCV valve...... Leaking pretty much around 5psi and almost shooting the dipstick out. I could hear the air trying to rush out of the dipstick basically.

Got 2 different PCV valve from O'Riellys and another from Autozone which both cannot hold even 1psi so I returned them for being crap.


Anyone know of a good brand / place to get a PCV that can possibly hold 30~ psi ?

 

You must buy the OEM PCV for the Evo.

 

Remove it, plug the intake port, and then install a catch can system.

 

thats what i did

 

Yeah I have the -AN fittings from STM, I just don't have the $ right now to get a catch can just yet.


I was told the OEM pcv can fail at low boost aswell.

 

Get the OEM pcv. End of story.

 

Neither. I use a check valve. I have an extra. I'll send you one.

 

Best Tuner Ever !

 

I had the same experience when trying to by an aftermarket PCV valve. The OEM original is back in my car.

 

Has anyone tried this PCV valve?

http://www.mellonracing.com/index.ph...oducts_id=2529

 

Correct it doesnt close properly thus boost builds slowly.

YOU still need a good PCV valve system with any catch can.. the valve has to be there or the engine boost pressure goes directly to the crankcase...

High boost conditions can overcome the PCV valve system as well, pressurize the crankcase and blow out the dipstick

It is simple physics

 

If he removes the pcv and plugs the port off the intake manifold as suggested, how exactly will he be pressurizing his crank case?? With a proper catch can setup you can delete the pcv entirely. I can't think of any aftermarket intake manifold that has a specific pcv provision or barb off the top of my head.

 

^ this, keeps your intake manifold cleaner as well. even better if you delete the egr.

 

Yeah my EGR is deleted


The PCV is leaking above 5psi on a boost leak test so I'm sure that's not good for the crankcase

 

The PCV has a spring inside it to seat the check ball. The check ball should only open when under vacuum and the spring will hold it in place and seal when under boost.

Lets face it, your car is not stock. Delete the PCV system and install a catch can. Let your engine breathe properly. Once you start turning up the boost, you are going to get more blow by and pressureize the crank case. Also, if you have the front breather hose still going into your intake, you are going to have oil going into your turbo/IC/ intake and the end result will be unmetered fuel as you are starting to burn oil.