Thread: PCV Valves, Crankcase Ventilation and a Lesson Learned
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  #53  
Old 02-27-2026, 10:26 AM
Tandyman Tandyman is offline
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Join Date: Jun 2006
Location: Northern GTA, Canada
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A PVC valve actually restricts flow at high vacuum and is open at WOT.
This is how a PVC valve works

https://comtires.com/blog/auto-repai...-of-a-bad-one/

Glenn

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