CAS, leaking oil
 

anyone have any problems with a cas leaking oil? we replaced the O ring on it and it still does it

Re: CAS, leaking oil
 

I also have this problem, I am quite perplexed.

I have also replaced the o-ring.

my best guess is there is excess pressure from boost/valve train/blowby and for whatever reason it is not getting vented out the breather on the side of the valve cover.

my plans are to re-connect my breather to the intake side of the intake pipe, one so the metered air is accounted for, thus resulting in running smoother and second so that there will always be vacuum in the valve cover.

Just because something leaks doesnt mean that it directly is the problem.

Re: CAS, leaking oil
 

Rtv

Re: CAS, leaking oil
 

what he said, use rtv with it, you should be fine.

Re: CAS, leaking oil
 

Have you checked the drain back hole in the head, might be plugging up?

Re: CAS, leaking oil
 

We fixed it.. we took a 90 cas and used the two very thin o-rings and threw them on the original cas