Got my car home and pulled it in the garage to do a few upgrades and I took the air box off and intake elbow and it was all ripped. But inside the TB and intake manifold there is an oily residue all over. What is it from? The intake elbow wasn't sealed to the TB and it was leaking air there but it still ran fine. I need to know if the intake gaskets are bad or what the problem is and how serious it is. Motor makes no strange noises and runs great and it has 120,000 miles BTW its a 95 Z

Thanks in advance guys

 

check the pcv

 

I would also replace the elbow and you should see the car run even better. Usually the car runs bad from an air leak but maybe it was torn but not allowing much air out.

 

Get a catch can, I can't believe how much mine has caught so far.

 

I'm getting a Moroso CAI and an aluminum elbow, that was the reason to take these parts off and I was hoping I wasn't going to have a big problem. I'll get a pcv tomorrow, but what about a catch can. Where did you put yours and whats the point? Did you vent your pcv to the catch can or how else did you do it

Thanks guys

 

The line from the PCV goes into the catch can, then the line from the catch can goes under the throttle body, it catches all the oil that comes through the PCV system. I got hte one from next level performance (I think thunder racing sells it now too), not a POS ebay one that doesn't have any internal baffling. I mounted it to my coil bracket.

 

There's 2 common ways oil can get in the intake tract at the TB. One is from the vent tube that goes from the pass valve cover to the passenger side of the TB. Technically, air should only flow from the TB to the VC as that is the vent to let in air that the PCV is sucking out....but, that is rarely the case on a higher mileage car as blowby pressure may escape thru that tube at WOT when there is little vacuum on the PCV valve...thus pushing oil into the TB intake.
The other way is the PCV is sucking in some oil vapors and it gathers in the TB then, this is very normal. A new PCV may reduce it some, but a catch can is the best option.

Since I have a Ram air intake, I mounted my catch can where the stock air filter used to be.
My LT4 truck get a about a full cup of oil in the can every 2k miles or so. My GN never gets a drop yet, the '95 TA hasn't filled up yet in 3k miles, but has some in it.

 

Ok it looks like a catch can is the way to go then. Anyone have pics of it installed or some type of how-to for it? I know its pretty self explanitory, but I'd like to see what you used and where you routed everything

 

Actually the breather tube from the pass. VC to the TB is designed to be neutral flowing. Air will flow either way. As you stated it is very common for vapors to enter the intake because the baffle on the pass. VC doesn't do its job very well.

 

I'll get some pics tomarrow when its light out. http://www.thunderracing.com/catalog...&sid=776#P5920
I have the black version. Basicall all you do is get some 3/8 hose from the parts store. Run a line from the PCV valve to the top port on the catch can, then a line from the side port to under the throttle body on the intake manifold. Mine mounted perfect on the coil bracket.

 

Another option is to add a Deutsch BF412 valve cover oil separator. This is a low cost plastic piece that mounts to the valve cover, replacing the existing 90 degree plastic elbow.

 

But you will still have oil vapors thru the PCV. In order to completely prevent oil in the TB, you can either get the breather mentioned, or completely remove the vent tube and plug the opening on the TB, and place a brether on the valve cover, and then add a catch can in the PCV line.
I have one of these for $30 from ebay and are very nice and have a site window so you know when it needs emptying.
http://cgi.ebay.com/ebaymotors/OIL-R...QQcmdZViewItem

 

Subscribing for future info!

-B

 

This thread is exactly what i was researching
This site is awesome

I just bought that canister off ebay, and ill be going to autozone for the seperator elbow

 

The ebay catch cans have nothing in them to condense the vapor into a liquid so you will still get oil in the intake through the PCV line. Thats why they are so cheap.