im about to do the 20$ catch can, and found stuff shady in the directions, i dont know if the hose is in diferent locations from 03-04 or if it was a funny pic. look at the attached pic and tell me if that is the right hose. and which way is the air flow, point A to point B or the other way around. thanks. i would search more but want to get this done before dark

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You got it, it's the PCV valve hose (A) and you splice it in so it flows towards (B). Line up the arrow on the top of the can to match the flow....[sm=smiley20.gif]

 

that just seemed wierd to me, i have no experience with engines really, i thought the air would be going from the intake to that thing on top of the cover.....lol im a tard when it comes to this stuff

 

Don't forget the hose clamps, those lines can pop off under "spirited" driving....

 

GJ! those are them. Clamp'em good.

 

It's dark now, how'd it go??

 

it went good, no problems really, i got a red line from nappa because i thought it would look good, but it kinda looks ghetto, i also started the airbox mod, my hole in the hood is alittle rough and i need to touch it up, what kind of paint would match it nice?

 

You can put the catch can at either end (A or B), it's just a matter of having a place to mount it. I went with putting it on the "A" side and zip tied it to the A/C lines. Since you are using the air box/hood ram air mod, you won't need the second catch can or the need to T in the other vacuum line into the existing catch can (it is only needed if you have a short ram intake or a cold air intake).

The direction of flow is a fairly simple concept, here's how it works. The PCV valve allows crankcase gases to be drawn out of the engine to keep them from building up, they can become combustible and cause severe engine damage if it were to stay in the engine (this is very unlikely to ever happen though). As the outside air gets drawn into the engines cylinders through the intake manifold, it causes a drop in atmospheric pressure thus drawing the gases out of the engines crankcase through the PCV hose. The reason for the oil catch can is self explainatory, but it is needed because under higher boost pressures the oil tends to blow by/past the PCV valve and get into the intake manifold. This can lead to the engine burning oil and possible fouling out the spark plugs. And because of the intake manifolds location and design, the oil could also run down into the throttle body and into the intercooler when it not running.

There you have it, the how and the why. And as G.I. Joe always said,"and knowing is half the battle".

Here is a pic of my 2 oil catch can set-up:

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