Deleting PCV on LS3
08-01-2012, 12:52 PM
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Deleting PCV on LS3 I want to try running w/o the PCV setup. From my readings I believe this is what I want to do, but I'd like to confirm first (ls3 480 crate engine in the pictures)
If I understand this right, I want to
-plug #3
-plug #5
-connect #4 (pass. valve cover) to #2 (driver valver cover) (?or do I want to plug these and not connect the 2 valve covers together?)
-stick on k&n breather in place of oil cap
Would that be correct? Anything else to plug and/or connect togther?
If I understand this right, I want to
-plug #3
-plug #5
-connect #4 (pass. valve cover) to #2 (driver valver cover) (?or do I want to plug these and not connect the 2 valve covers together?)
-stick on k&n breather in place of oil cap
Would that be correct? Anything else to plug and/or connect togther?
Last edited by 2efnfast; 08-01-2012 at 01:11 PM.
08-01-2012, 02:06 PM
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It took me a sec to realize your intake manifold was on 'backwards'... lol
I thought that you connect the valley plate (#5) to the valve cover (#4). Then you need to put a breather where your oil cap is and another breather where #2 is.
Then you need to plug the intake manifold nipple (which I believe is #3)
I thought that you connect the valley plate (#5) to the valve cover (#4). Then you need to put a breather where your oil cap is and another breather where #2 is.
Then you need to plug the intake manifold nipple (which I believe is #3)
08-01-2012, 04:59 PM
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4 would have gone to the intake to draw in air, but it can do that with the filtered oil cap now.
08-01-2012, 06:21 PM
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I can't remember my stock setup... but 5 would have probably gone to 3 in order for the intake manifold to pull a vaccum out of the crankcase. If you cap 5, I'm not sure that's healthy for the motor. If you run 5 up to 4 on the valve cover, you're letting that vent out the oil cap filter.
4 would have gone to the intake to draw in air, but it can do that with the filtered oil cap now.
4 would have gone to the intake to draw in air, but it can do that with the filtered oil cap now.
Connect 5 to 4
Replace oil cap with k&n breather
cap 3
cap 2 (driver side valve cover)?
Would that be correct? Or would I want to T and connect 2, 5, and 4?
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08-01-2012, 07:18 PM
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So you didn't T the driver and passenger side together? I just want to make certain I do this right to see if it's better than using the pcv system. (no point doing it if you do it wrong, haha)
08-22-2012, 01:39 PM
#10
Seems to me like you would want to run #5(valley cover port) to a vented catch can instead of running back thru motor. Maybe it will circulate itself out thru the oil cap, I am not sure. That crap needs to get out of your motor, via combustion or dispersing into the air. As for #2 (driver side valve cover), unless you are having excess crankcase pressure, I would think just capping it would work. If it starts blowing oil out breathers and dipstick, then add a breather there. Good luck with it and post results once motor is running.
