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Old 03-27-2025, 09:41 AM
kpbrown31 kpbrown31 is offline
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Why do more people not just vent the PCV to the atmosphere when they have issues like this? I've been curious and I'm wondering what downsides you see. It seems I've seen a lot of chevy's vent out of the valve covers to atmosphere over the years.

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Old 03-27-2025, 10:08 AM
Joe-Touring Joe-Touring is online now
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Originally Posted by kpbrown31 View Post
Why do more people not just vent the PCV to the atmosphere when they have issues like this? I've been curious and I'm wondering what downsides you see. It seems I've seen a lot of chevy's vent out of the valve covers to atmosphere over the years.
Ideally, you do want something drawing the fumes out of the crankcase, they are corrosive. Better for engine longevity to suck that stuff outta there, keeps your oil cleaner, etc

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Old 03-27-2025, 10:50 AM
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Originally Posted by kpbrown31 View Post
Why do more people not just vent the PCV to the atmosphere when they have issues like this? I've been curious and I'm wondering what downsides you see. It seems I've seen a lot of chevy's vent out of the valve covers to atmosphere over the years.
That's what my engine builder did. I have a solid valley pan with breathers on my valve covers. No pcv valve.

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Old 03-27-2025, 11:00 AM
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I drilled and tapped holes on my intake, used AN fittings, tube nuts, and aluminum tube for my PVC & brake booster. Works great.

You would only need to do one.

Don't run that flat aluminum Butler pan with the PCV in it, as previously stated, they suck a lot of oil.


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