PCV Valve Hookup

[JaeTea]

This is on a SOHC so I don't know its it different from a DOHC.

Whats the best way to run this thing? Leave it stock, dump to atmosphere or run it to a catch can.

When you remove the hose which side do you leave connected? The side on the intake manifold or the side on the intake plenum? Do you just plug the hole thats left open?

I've posted this probably on every 240 forum and have YET to get a straight answer.

So I'm really hoping someone here can help me.

Found a pic to better explain WTF I'm talking about..





Modified by JaeTea at 6:08 PM 8/6/2006
Modified by JaeTea at 4:16 AM 8/7/2006

[240marcuSX]

Why do you want to remove it in the first place?

[JaeTea]

Why do you want to remove it in the first place?

The whole point to running an oil catch can on a turbo'd KA is to stop thePCV from seeing Boost. If you boost a stock KA the PCV see's boost whichdoesnt allow the gasses to escape the crankcase. If you plumb it to beforethe turbo it will see vac all the time like in an N/A application (stock).

I don't want to remove it, I want to run it to a catch can.

[240marcuSX]

Ok, I didnt gather that from your first post, in fact, i dont even know why I posted in KA-T. I guess I got turned around somewhere between the KA and suspension forums, lol.

It would seem to me though, that the end that goes onto the pcv valve (intake mani)would be the end that should go to the oil catch tank, but do no take that as a definite answer.

[j-z]

yeah you would want the end that connects to the intake manifold to run into your catch can, and then into the inlet pipe for your turbo. thats how im running mine on my de, cept i dont have the valve in mine. i think youre good even if you leave it with the stock configuration because its a one way valve. it will only close when you hit boost and that only last for seconds anyways. in reality you could just leave it how it is and be perfectly fine. only reason i ran mine to a catch can is because i didnt want to be burning oily vapors.

[JaeTea]

yeah you would want the end that connects to the intake manifold to run into your catch can,

Are you sure you run the intake manifold to the catch can? The PCV Valve is located on the intake plenum (the big thing with ECCS on it). I thought you had to keep the PCV Valve connected for your car to actually run.

Well its mainly a track car so its going to be seeing boost quite often so I'd rather be safe than sorry.

[j-z]

you take the hose that runs to the intake mani off because you dont wan the pcv system to see boost correct?? thats the only way it will see boost is if you leave that hose on the plenum. theres only one way you can do it for the system to not see boost. i guess you misunderstood what i was trying to say. the pcv valve lets the crankcase ventilate by drawing a vacuum from it. i still have it being ventilated by vacuum only constant %100 whenever im driving the car.

[jr_ss]

yeah you would want the end that connects to the intake manifold to run into your catch can, and then into the inlet pipe for your turbo. thats how im running mine on my de, cept i dont have the valve in mine. i think youre good even if you leave it with the stock configuration because its a one way valve. it will only close when you hit boost and that only last for seconds anyways. in reality you could just leave it how it is and be perfectly fine. only reason i ran mine to a catch can is because i didnt want to be burning oily vapors.

J-z, if you don't have a valve in yours wouldn't you be pressurizing the oil catch can? Maybe I misunderstood what you were saying, but the PCV will close under boost and stay open under vacuum (like it's designed to work), so not running a valve at all would be sending boost into your oil catch can correct? I dunno maybe I'm dillusional.

[j-z]

LOL oh no not again! if you read my post youll see that i said its a one way valve. i told him he could run it how it is from the factory and be good to go because it only allows for vacuum. the way mine is set up is i have a hose on a nipple coming straight out of the front timing cover where the oem pcv system use to reside. i then have have that hose going straight to the catch can, and from the catch can to the turbo inlet pipe. that setup results in vacuum %100 of the time while the motor is running. i better not be seeing boost in the catch can.

[jr_ss]

Oh no, not again, I know how the PCV system works I was just curious as to how you had yours setup. I was mistaken as to where the valve was located. I'm still new to the Ka, I didn't know the PCV was on the timing cover.... I thought that you had the mani line to the catch can and then back to the inlet side. I got the timing cover and intake mani switched...

[j-z]

well the E is on the intake mani as i found out from this thread (never knew that and didnt care). and the DE is on the front lower timing cover.