I have a catch can but...
Thread Starter
Burning Brakes
Joined: Mar 2006
Posts: 1,095
Likes: 5
From: Oldham County Louisville, KY
I have a catch can but...
Still getting oil in the intake. I empty the catch can every couple months and it's about 1/2 full each time. I pulled the throttle body off this past week to install a nitrous plate kit and saw this. I don't how long it took to get that much in there. Could be 2 months or two years.
Safety Car
Joined: Aug 2011
Posts: 4,449
Likes: 409
From: Portland OR
I think the best solution is to just vent the crankcase with filtered breathers. This results in no oil in the intake manifold.
Except for emissions testing time of course.
Another option would be to run a more race style remote catch can setup, but there just isn't much room under the hood.
Finally, my engine builder tells me that there are new oils available that don't flash to vapor near as easily. Resulting in less oil mist and less oil in the intake. I believe he said it was made by Joe Gibbs Racing, but it is very expensive.
Flame away guys....
Ron
Except for emissions testing time of course.
Another option would be to run a more race style remote catch can setup, but there just isn't much room under the hood.
Finally, my engine builder tells me that there are new oils available that don't flash to vapor near as easily. Resulting in less oil mist and less oil in the intake. I believe he said it was made by Joe Gibbs Racing, but it is very expensive.
Flame away guys....
Ron
Thread Starter
Burning Brakes
Joined: Mar 2006
Posts: 1,095
Likes: 5
From: Oldham County Louisville, KY
can inlet from Valley cover, outlet to the PCV then to intake.
Valve cover tube to coupler in front of the LS2 throttle body.
Thread Starter
Burning Brakes
Joined: Mar 2006
Posts: 1,095
Likes: 5
From: Oldham County Louisville, KY
I think the best solution is to just vent the crankcase with filtered breathers. This results in no oil in the intake manifold.
Except for emissions testing time of course.
Another option would be to run a more race style remote catch can setup, but there just isn't much room under the hood.
Finally, my engine builder tells me that there are new oils available that don't flash to vapor near as easily. Resulting in less oil mist and less oil in the intake. I believe he said it was made by Joe Gibbs Racing, but it is very expensive.
Flame away guys....
Ron
Except for emissions testing time of course.
Another option would be to run a more race style remote catch can setup, but there just isn't much room under the hood.
Finally, my engine builder tells me that there are new oils available that don't flash to vapor near as easily. Resulting in less oil mist and less oil in the intake. I believe he said it was made by Joe Gibbs Racing, but it is very expensive.
Flame away guys....
Ron
Le Mans Master
Joined: Mar 2002
Posts: 5,955
Likes: 161
From: PNW
I put the fixed orifice PCV "valve" in place of the original spring loaded valve, and seemed to cut down on the amount of oil in the catch can.
If your catch can is collecting that much oil, then the can is definitely working ... but something else is a miss. Wondering if you have excess ring blow-by or some other issue going on? Is this engine force induction?
Thread Starter
Burning Brakes
Joined: Mar 2006
Posts: 1,095
Likes: 5
From: Oldham County Louisville, KY
Hose routing sounds correct.
I put the fixed orifice PCV "valve" in place of the original spring loaded valve, and seemed to cut down on the amount of oil in the catch can.
If your catch can is collecting that much oil, then the can is definitely working ... but something else is a miss. Wondering if you have excess ring blow-by or some other issue going on? Is this engine force induction?
I put the fixed orifice PCV "valve" in place of the original spring loaded valve, and seemed to cut down on the amount of oil in the catch can.
If your catch can is collecting that much oil, then the can is definitely working ... but something else is a miss. Wondering if you have excess ring blow-by or some other issue going on? Is this engine force induction?
Le Mans Master
Joined: Mar 2002
Posts: 5,955
Likes: 161
From: PNW
Without a PCV valve, the vacuum in the intake manifold is trying to suck the crankcase way more than it should be doing.
Last edited by ZeeOSix; Sep 16, 2012 at 07:16 PM.
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Thread Starter
Burning Brakes
Joined: Mar 2006
Posts: 1,095
Likes: 5
From: Oldham County Louisville, KY
If you mean no PCV valve in the line, then ABSOLUTELY ... there needs to be a metered orifice in the dirty side of the PCV line, or else there will be TONS of vapors/oil going into the intake manifold.
Without a PCV valve, the vacuum in the intake manifold is trying to suck the crankcase way more than it should be doing.
Without a PCV valve, the vacuum in the intake manifold is trying to suck the crankcase way more than it should be doing.
Le Mans Master
Joined: Mar 2002
Posts: 5,955
Likes: 161
From: PNW
The "clean" side of the PCV system is the line between the front of the throttle body and the valve cover. It's the line that clean air travels into the engine to make up any air that is sucked out by the vacuum in the intake manifold. The PCV system is an actively flowing system ... dirty vapor filled air out, and fresh air in to create a washing flow through the engine.
Make sure the PCV valve is between the catch can and intake manifold ... which I think you said it was.