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Blocked PCV
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02-13-2016, 12:19 PM
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zzyzzx
GLS member
Join Date: Mar 2008
Location: Baltimore, MD USA
Posts: 5,530
I just got around to testing my old aftermarket PCV valve and yes I can blow through it in both directions. It just works better in one direction. This is different from the Motorcraft one, which only lets air by in one direction.
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