Air filter soaked with oil??
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Safety Car
Joined: Nov 2003
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From: Lake Worth FL
St. Jude Donor '03-'05-'06 & '12
Air filter soaked with oil??
Recently had heads, cam, and FAST 90mm intake done on my '02 Z06. Took it to the road race course yesterday and it ran great, but towards the end of the day, I noticed a small puddle of oil dripping from my air intake (Vortex) and the filter was soaked with oil. The only way it could've gotten there that I can see is from the hose that runs from the passenger side head into the air bridge. I thought this was for cold air to get INTO the head. I already have a catch can for the PCV system so that isn't the issue. There was barely any oil in it when I checked. Any ideas guys?
Le Mans Master
Joined: Jul 2002
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From: Slave to the evil empire
Cruise-In V Veteran
St. Jude Donor '04
You should have a hose running from the throttle body to the right valve cover and then the other part of your PCV system will be the hose coming from your valley cover to your catch can and then to the intake manifold, you shouldn't have any part of your pcv hose system running to the airbridge.
Thread Starter
Safety Car
Joined: Nov 2003
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From: Lake Worth FL
St. Jude Donor '03-'05-'06 & '12
Originally Posted by FFR-Z06
You should have a hose running from the throttle body to the right valve cover and then the other part of your PCV system will be the hose coming from your valley cover to your catch can and then to the intake manifold, you shouldn't have any part of your pcv hose system running to the airbridge.
Someone suggested that its reversion on decel due to my cam (LG G5X-3 112 lsa).
Former Vendor
Joined: Feb 2004
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From: Las Vegas NV
St. Jude Donor '06 & '12
Its common.. You need an oil catch can on your vent system
*EDIT* I just noticed you have an LS6.
Your pcv line should come off of your valley pan and go into the catch can. Then from your catch can to the Intake manifold.
You should also have a small line coming off of your TB and run to your pass side valve cover. This is to push in fresh air when the TB blade is shut.
I have seen it where oil leaks down through the valve cover vent line and into the TB, which causes detonation.
Do you have a line that runs from your valve cover to your air filter? A lot of F/I guys do this..
*EDIT* I just noticed you have an LS6.
Your pcv line should come off of your valley pan and go into the catch can. Then from your catch can to the Intake manifold.
You should also have a small line coming off of your TB and run to your pass side valve cover. This is to push in fresh air when the TB blade is shut.
I have seen it where oil leaks down through the valve cover vent line and into the TB, which causes detonation.
Do you have a line that runs from your valve cover to your air filter? A lot of F/I guys do this..
Last edited by Jeff @ TPE; Nov 20, 2005 at 12:16 PM.
Thread Starter
Safety Car
Joined: Nov 2003
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From: Lake Worth FL
St. Jude Donor '03-'05-'06 & '12
Originally Posted by AMERICAN_HP
Your pcv line should come off of your valley pan and go into the catch can. Then from your catch can to the Intake manifold.
You should also have a small line coming off of your TB and run to your pass side valve cover. This is to push in fresh air when the TB blade is shut.
Do you have a line that runs from your valve cover to your air filter? A lot of F/I guys do this..
You should also have a small line coming off of your TB and run to your pass side valve cover. This is to push in fresh air when the TB blade is shut.
Do you have a line that runs from your valve cover to your air filter? A lot of F/I guys do this..
Melting Slicks
Joined: Jul 2004
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From: Wilmington Ca.
By changing to the different intake system you slightly changed the PCV system. Normally the passenger valve cover vent lets air in to help scavenge out crank case fumes to the PCV vacuum line. Your new 90 mm intake changed the location of the valve cover vent to a new location on the air bridge. Under track conditions you will find that vacuum will occasional be sucking crank case oil vapors into the air bridge. If you install the catch can in this line you will have air flowing in different directions determined by the engine operating conditions. I am not sure how your catch can will work with alternating air flow. You can run a test trial and see what happens.
Team Owner
Joined: May 2004
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From: SoCal
Originally Posted by dmtnt
I have a catch can in place between the valley cover and manifold. When I checked it, there was barely a drop of oil in there. Also there is a line that runs from the valve cover to the air bridge behind the MAF and ahead of the TB. This is where the oil is coming from. Someone suggested a catch can on this line which I would think would solve the problem. Considering the lack of oil in the can from the valley cover to pcv/manifold line, I may return that line to stock and run the catch can to the valve cover/air bridge line.
Basically I have the LS2/90 TB setup. I have a catch can in the valley to manifold line.....it does catch oil. I have a line going from valve cover vent to the air bridge. I recently checked the inside of the hose where it enters the airbirdge and found OIL !!!!!
I posted a thread recently that NO ONE replied to. I asked if there should be a filter of some sort in the line from valve cover vent to air bridge. Or should it be spliced some how into the catch can.
Time for me to check and clean my air filter and look and my throttle body plate.
Or I could just let all the hose hand loose and drag under the car like some big headed buddy
DH
