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LS6 PCV conversion, should I cap the valve cover fittings or run a hose between them?

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Old 02-22-2011, 01:17 PM
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Default LS6 PCV conversion, should I cap the valve cover fittings or run a hose between them?

Installing the 04+ LS6 valley cover with the PCV built in, do I just cap off the fittings on the rear of each valve cover, or should I run a hose from one valve cover to the other?

I know the pass side has the vent tube running to the TB, but the drivers side would be completely sealed up with the fitting capped, so I just want to make sure.
Old 02-22-2011, 01:24 PM
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Yes... Cap off the fittings on the covers except for the fresh air tube on the pass side to tb.. Then just run the u-style hose from the valley cover to intake, done.
Old 02-22-2011, 01:46 PM
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Great, that's the way I understood it, just wanted to make sure.

Thanks my fellow Okie!
Old 02-22-2011, 02:37 PM
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Cap them off. Do not hook them together. That caused me to blow oil out of the rear main seal. I dont know how that advice has started floating around
Old 03-12-2011, 09:41 AM
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I'm running the GM Performance valve covers on my 3rd Gen Nova conversion. I had one valve cover drilled and tapped with a hose going to a vented catch can. Getting a lot of vapors coming out the top of the filter. Adding the new LS6 valley cover, should I cap off the one valve cover I had drilled or do you still need a fresh air vent?
Old 03-12-2011, 11:04 AM
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Fresh air vent should come from the throttle body.
Old 03-12-2011, 11:50 AM
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Keep the clean air inlet.
Old 03-14-2011, 07:47 AM
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Checked over the weekend, on my conversion, I'm running a LS3 Intake with an Edelbrock TB, there are no vacuum ports coming off of the TB, have 1 on each side of the intake behind the TB, assuming I'll hook the one on the RS to the LS6 valley cover I'm adding. How should the "fresh air" be plumbed?
Old 03-14-2011, 11:14 AM
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Originally Posted by stcloudguy
Checked over the weekend, on my conversion, I'm running a LS3 Intake with an Edelbrock TB, there are no vacuum ports coming off of the TB, have 1 on each side of the intake behind the TB, assuming I'll hook the one on the RS to the LS6 valley cover I'm adding. How should the "fresh air" be plumbed?
You could drill a hole in the air lid and run the hose from it.
Old 03-14-2011, 02:30 PM
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Originally Posted by stcloudguy
Checked over the weekend, on my conversion, I'm running a LS3 Intake with an Edelbrock TB, there are no vacuum ports coming off of the TB, have 1 on each side of the intake behind the TB, assuming I'll hook the one on the RS to the LS6 valley cover I'm adding. How should the "fresh air" be plumbed?
Those are vacuum sources. One typically goes to the PCV system (valley or valve cover OUT) and the other goes to the vapor line on the fuel system. Fresh air just needs to be fresh filtered air.
Old 03-14-2011, 04:29 PM
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Mine came with two caps. One for the back of the pass cover and one for the back of the driver's cover.
Old 03-14-2011, 08:38 PM
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http://i900.photobucket.com/albums/ac206/lsnova/Nova%20Build%202010/100_2803.jpg[/URL]Thanks for the info guys. When I first had it running, pic attached, I just had a filter in the valve cover, had oil all over everywhere. I've since just put a filler cap in this, added an elbow from the DS valve cover to a vented catch can. Now I'll add the LS6 VC and reroute the line from the DS cover and plumb it into the pipe in front of the MAF. Thanks for all the pointers.
Old 03-14-2011, 08:41 PM
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^ here ya go.
Old 03-15-2011, 10:15 AM
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i am fixing to install a ls6 valley cover when i do a motor swap in the next couple weeks i am planning on putting push in breathers in the valve cover holes



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