PCV Valve before or after can?
Thread Starter
Pro
Joined: May 2003
Posts: 520
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From: Wilmington NC
PCV Valve before or after can?
Well which is it? I would think you would place the valve before the can in order for the can to catch anything that passed the valve. I have seen pictures however of the valve at the manifold after the can???
Thread Starter
Pro
Joined: May 2003
Posts: 520
Likes: 0
From: Wilmington NC
http://www.mikenorrismotorsports.com...atch_Cans.html
Also if you take note of these pictures, one picture has the nipple of the PCV going toward the manifold, and the other has the nipple going toward the valley...
What gives?
Also if you take note of these pictures, one picture has the nipple of the PCV going toward the manifold, and the other has the nipple going toward the valley...
What gives?
Race Director
Joined: Dec 2000
Posts: 19,304
Likes: 85
From: San Diego CA
The PCV valve requires oil-lubrication, so typically, a catch can device is plumbed downstream. However, given that most catch cans do not trap all the oil that is in aerosol form, it probably doesn't matter.
Le Mans Master
Joined: Mar 2002
Posts: 5,955
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From: PNW
What you'll find is that on LS1s the PCV valve will be easiest to hookup before the CC. On the LS6s the PCV valve will be easiest to hoopup after the CC. This is just due to the way GM has set them up in the OEM configuration.Most important thing is to make sure you get the direction of the PCV right. Later year LSx engines don't have a spring loaded PCV valvle, but simply a fixed 2.5 mm orifice to regulate the crankcase vapor flow through the PCV system.
Last edited by ZeeOSix; May 25, 2008 at 11:00 PM.
Pro
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Race Director
Joined: Dec 2000
Posts: 19,304
Likes: 85
From: San Diego CA
I've spoken to some people who have the same type of setup. They told me that the "mess" (oily residue on engine parts) happens after many thousands of miles. It might be a bit soon for you to see the buildup of oil in your engine bay.
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