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From: Hank Dozier
Email: dozierhc <at> aol.com
Remote Name: 220.127.116.11
Date: November 20, 2003
I think that the PCV valve is not a guaranteed check valve. Although it would close on reverse vacuum, the seat in not made to be a total seal (never a requirement for a PCV valve). You might get lucky, but why not steal an inline screw-in unit off a fender-mounter vacuum reservoir tank and use that instead?