Possible a newb question, but I need to know!!!

[patrickm1587]

Would it hurt anything if I didn't put the stock oil catch tank/oil-air separator, whatever it is back on? And I just just put some of those small filters you can get from auto parts stores on there where the piece is on the valve cover and where the part goes back into the crank case?

[Jacototheb]

That's fine. They're the same thing but smaller.

[patrickm1587]

That's fine. They're the same thing but smaller.

What's the same thing but smaller? The air filters? I know that. I'm needing to know if it's okay to run the engine without the oil catch can or whatever that thing is on there.

[PyR0NiAk]

NO. It is not ok to remove the line with the oil catch can and use a small air filter instead. You'll build up excess pressure in the crank case. Why do you want to remove it? Don't like the way it looks? Aftermarket ones range from $20 - $80 depending on your tastes and preferences.

[Jacototheb]

Oops, I misread. It's ok to do that on an N/A car but not boosted.
And you can get nice catch cans on enjunku or have a shop make you one. Don't use a fuel filter or whatever you were planning on using.

[Rays_240]

I have a question about this also. My exhaust manifold dosent leave enough room for the stock catch can. How should the aftermarket can be routed corectly? Does it have to drain back into the block like the oem one? If not, then what should I put on the drain tube attached to the motor?

[patrickm1587]

Mine won't go on because I've got a top mount turbo and the catch can won't fit on there. Well if I relocate it, do you still have to run a line to the intake, just like it was stock?

[patrickm1587]

NO. It is not ok to remove the line with the oil catch can and use a small air filter instead. You'll build up excess pressure in the crank case. Why do you want to remove it? Don't like the way it looks? Aftermarket ones range from $20 - $80 depending on your tastes and preferences.

How would the pressure in the crank case get high if there is a place where the pressure can go out? And I'm talking about where that line comes out of the crank case. What if you did something like this:

http://stzautomotive.com.au/wp-content/ ... ta22-4.jpg

[PyR0NiAk]

There's no vacuum on that setup. The way it's always been explained to me is that without it being attached to the intake, you'll build up excess pressure in the crank case. There are actually a few threads on here where guys say they used the filter instead of running it to the intake after the T, and it cost them their motor. The big question here is, why NOT? A fitting, some hose, and a good welder, and you're set. Hell, FRSport sells fittings that go through the couplers, so you don't even need a welder.

[patrickm1587]

There's no vacuum on that setup. The way it's always been explained to me is that without it being attached to the intake, you'll build up excess pressure in the crank case. There are actually a few threads on here where guys say they used the filter instead of running it to the intake after the T, and it cost them their motor. The big question here is, why NOT? A fitting, some hose, and a good welder, and you're set. Hell, FRSport sells fittings that go through the couplers, so you don't even need a welder.

Yeah I knew there was no vacuum, I got to wondering why they would have even bothered with that setup. I'll look into getting it hooked up, if it could cost me the motor then it should be hooked up. Where can I find a fitting that will go through a silicone coupler? That would be good.

Edit:

Is this what you're talking about? http://www.frsport.com/Turbo-Quick-Tap- ... _7854.html

[PyR0NiAk]

Give me 2 minutes.

[PyR0NiAk]

http://www.frsport.com/Turbo-Quick-Tap- ... _7854.html

Pretty sure I beat my 2 minute claim.

[patrickm1587]

http://www.frsport.com/Turbo-Quick-Tap- ... _7854.html

Pretty sure I beat my 2 minute claim.

So that would work alright? That looks like it's a little small I wish it told the diameter of it.

[PyR0NiAk]

No clue, bro. Honestly, I learned about it while I was in Iraq when someone else was looking at using one. It looks like it would be the same size as most of the aftermarket catch cans, but definitely smaller than the stock one. Try giving FRSport a call and ask for their recommendations. They have a hotline on their website.

[patrickm1587]

Alright, I will, I appreciate it.

[patrickm1587]

Listen though, just for a little while would this hurt anything: Just put a small filter on the front side of the T that comes out of the valve cover, then run a line from the back side of the T down to where the tube comes out of the crank case. That wouldn't let the crank case build up any pressure would it? It might just blow some oil out of that filter wouldn't it?

[Rays_240]

"How should the aftermarket can be routed corectly? Does it have to drain back into the block like the oem one? If not, then what should I put on the drain tube attached to the motor?"

anyone?

[PyR0NiAk]

Patrick, refer to above post about vacuum.

Rays, your aftermarket can should have one hose running to the tube from the crank case, and one hose running to the T on the valve cover.

[Rays_240]

ok then I dont need a hose running to my intake? does the hose coming from the crank case create vacuum?

[Rays_240]

or do I then need a line on the other side of the T Just like the factory setup.

[PyR0NiAk]

In order. Tube comes from crank case. There should be a line coming from that into the catch can. There should be a line coming from the catch can into the T. There should be a line coming from the T to the intake. (Just like the factory setup.) The reason people use aftermarket setups is they look much better, and they're also easy to relocate. They provide no other real benefit.

[Rays_240]

ok well then heres another question. if the vacum is coming from the other side of the T then why would any of the oil go through the catch can? I would think it would all just go into the intake. Also do I 100% have to drain it back into the crankcase or can I just cap that off and drain the catch can every once in awile. I noticed that the s14 and s15s dont drain into the crankcase.