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Old Jul 12, 2008 | 12:30 PM
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I recently added the LS6 valley cover to my car and this is how I'm thinking of running my new crankcase breather setup.



Does anyone see a problem with it?
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Old Jul 12, 2008 | 05:30 PM
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Originally Posted by DanWS6
I recently added the LS6 valley cover to my car and this is how I'm thinking of running my new crankcase breather setup.



Does anyone see a problem with it?
That's almost exactly what I have except I installed little filters directly on the valve covers instead of hose to a filter.

Some may argue that while in boost you're not getting proper crank ventilation but I have had no problems.
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Old Jul 12, 2008 | 05:47 PM
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I just wanted to make it easy to get to that breather to clean it. I'm thinking I should run two separate breathers off each vent instead.

I'm not sure how big of a deal it is to vent the crank case under boost either.
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Old Jul 12, 2008 | 09:10 PM
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You need to vent the crankcase under boost, or you'll push out the dipstick or a seal. A single breather should be enough as long as the line isn't restricted. You may get some oil on the breather element after a while.

I would keep a pcv valve in the pcv line, just to limit the amount of air pulling through there at idle,
or adjust the tb stop to let the throttle blade close a little more so the IAC can still manage the idle speed.
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Old Jul 12, 2008 | 10:51 PM
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Originally Posted by John_D.
You need to vent the crankcase under boost, or you'll push out the dipstick or a seal. A single breather should be enough as long as the line isn't restricted. You may get some oil on the breather element after a while.

I would keep a pcv valve in the pcv line, just to limit the amount of air pulling through there at idle,
or adjust the tb stop to let the throttle blade close a little more so the IAC can still manage the idle speed.
Yeah that's why I have a breather coming off the rear vents on the valve covers. I hadn't considered leaving the pcv valve in there, that might be a good idea. I guess that should go between the check valve and the intake.
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Old Jul 13, 2008 | 04:24 AM
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Instead of doing the filter off the two rear valve cover taps, why don't you just leave the factory PCV line attached connecting the driver to passenger side and run a metco breather on the driver side where the oil cap goes? Looks cleaner and the breather is easy to get to because its right up front.
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