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Old 05-12-2010, 01:48 PM   #1
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PCV valve

I just replaced my pcv valve and I was wandering if it's only an emissions component or it is related with performance, because unless I'm wrong the pcv valve connects to the intake and that means there is hot air traveling from the crankcase to the intake. Any thoughts?


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Old 05-12-2010, 02:48 PM   #2
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It's kind of for both.
Without it, the engine would build up way too much pressure and blow out seals (the least) to rings (the worst).

Lemme do a bit of searching instead of writing it all down...
Here you go:
http://en.wikipedia.org/wiki/PCV_valve
^^^Also explains why it's also an emissions requirement.

EDIT
LOL!!
Check out the last sentence:
Quote:
For this reason many engine tuners choose to replace the PCV system with an oil catch can and breather filter which vents the blow-by gases directly to atmosphere and retains the oil in a small tank (or returns it to the sump), although this technically fails to meet most engine emission legislation.
If you search around here you'll find plenty of discussions about how to install a catch-can system.
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Old 05-12-2010, 04:44 PM   #3
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Where is the PVC on our SVT's
How much And how hard was it to replace?
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Old 05-12-2010, 05:03 PM   #4
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The PCV is for emmissions and tree huggers , you are correct that it does such hot oily air back into the intake building up oil in the intake as does the vent from the valve cover

I vent both to the ground and let them breath freely , no psi will build in the engine if done properly

Tom
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Old 05-12-2010, 09:49 PM   #5
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Originally Posted by Mystic544 View Post
Where is the PVC on our SVT's
How much And how hard was it to replace?
its really simple.. i did mine yesterday. its on the left side at the top of your header. theres a 90 degree elbow tube holdin it in the engine.
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Old 05-12-2010, 09:50 PM   #6
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The PCV is for emmissions and tree huggers , you are correct that it does such hot oily air back into the intake building up oil in the intake as does the vent from the valve cover

I vent both to the ground and let them breath freely , no psi will build in the engine if done properly

Tom
we need a how to.
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Old 05-13-2010, 10:15 AM   #7
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Quote:
Originally Posted by 1turbofocus View Post
The PCV is for emmissions and tree huggers , you are correct that it does such hot oily air back into the intake building up oil in the intake as does the vent from the valve cover

I vent both to the ground and let them breath freely , no psi will build in the engine if done properly

Tom
This is how mine was when i bought it but i put it back in b/c i was scared something is gunna get sucked through that hole in the intake. should i disconnect it and put a piece of duck tape over the hole or something, or it doesnt matter?
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Old 05-13-2010, 11:44 AM   #8
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Thanks guys, the catch-can sounds great.
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Old 05-13-2010, 05:43 PM   #9
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Will venting the valve to ground cause any CEL's?
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Old 05-13-2010, 07:26 PM   #10
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Will venting the valve to ground cause any CEL's?
Nope. I've been doing it for over a thousand miles now.
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