pistol

im just quessing, what this cause this?

from the 'cold' side of the turbo, sparying it through the cooler into the engine?

KAS35RSTI

iTrader: (73)

It might just be blow by from the PCV. Blocking it off will prevent this.

pistol

what's the PCV?

pistol

found it thank you!

so basically it's part of the breather system? Ive got a catch tank on it's way anyway.

blank it off, do you mean remove it and pop a bolt in? or just connect the hose?

KAS35RSTI

iTrader: (73)

Its basically behind the inlet manifold towards the turbo side. The PCV causes blow by when you drive off boost. People tend to use a Oil catch tank.

snOOpy86

iTrader: (1)

noticed mines a lil oily as well on a my00 where do i find this valve?
is it better to replace it, or blank it?

KAS35RSTI

iTrader: (73)

Thats it. Depending on how man ports your catch tank has, you can either plumb it to the tank or just cut the pipe in half & blank each side. That should stop the blow by then all you do is clean the cooler with brake cleaner to remove all the oil.

Phildodd06

Dont blanking them off cause your crankcase pressure to rise?

stedee

iTrader: (4)

ditto - i thought blocking it off totally would not be a good idea

Splitpin

There's some spectacularly bad advice in this thread. Suggesting that oil in the intercooler has come from the PCV valve looks a little daft when you realise that the main discharge on the PCV system runs direct into the inlet manifold.

Similarly suggesting that breathers are blocked off completely ain't good. Efficient ventilation makes for a happier engine in a number of ways. The stock system's not a bad one for a roadcar, albeit not as good as a properly installed catch can.

While a certain amount of oil in the induction tract is normal, a lot of it can indicate the onset of problems that need looking at, so randomly telling someone that oil in the intercooler is "out of the PCV valve" is not only technically ignorant, it's potentially misleading.

Pistol - it's unlikely that the oil you're seeing is from the turbo coldside. Even if the seal on it is compromised, it wouldn't normally result in significant quantities of oil getting into the inlet tract. Whether what you're seeing is normal or not is all down to quantity. If in doubt get your car looked at.

While I don't want to scare anyone, nor make light of someone else's misfortune, this unfortunate collection of threads is probably required reading for anyone with a tendency to make assumptions (or silly guesses) on this subject.

https://www.scoobynet.com/general-te...t-up-cold.html
https://www.scoobynet.com/general-te...tercooler.html
https://www.scoobynet.com/general-te...als-turbo.html
https://www.scoobynet.com/general-te...g-impreza.html
https://www.scoobynet.com/general-te...-sell-fix.html

The thread titles alone tell the story. The moral of Mossi's experience is if something like this is bugging you, don't take anyone's word as to explanations unless they're actually looking at your car and have the experience to know what they're looking at. The people making random questionably educated guesses on internet boards won't be the ones paying to fix the damage if they're wrong.