Hey Guys,

Quick question on Fresh Air side for PCV..... I have custom valve covers that will have a line on the passenger side cover to the throttle body (before throttle blade). The idea is to have fresh air flow into the crankcase. However, I am looking for an inline check valve so that PCV does not go the other way. Since this is before the throttle blade, there should be no engine vacuum pulling in PCV from the crankcase, correct?

I am looking at a check valve specified at: vacuum between 2 and 29 in. Hg. and pressures from 1 psi up to 150psi. .5 lb. cracking pressure.

The question is whether or not this is enough pressure from the air on the inlet side to the valve cover side to open the check valve. It is listed at .5lb cracking pressure. I almost want to say that the air would be a constant 1 atmosphere from the inlet? If so, this would not allow the valve to be operational.

This is the link to the check valve - http://www.usplastic.com/catalog/ite...ickid=redirect

Any input would be very much appreciated!