Exhaust side Check Valve

[Ca_Silvia]

While installing my Z32 maf i have to redo the exhasut side pcv tube. I did a quick blow through test of the check valve on the exhasut side. When i blow through each side it lets air though both ways. Does this mean i need a new valve? Can i scrap that valve entirely or just replace it?

[D_Stirls]

The exhaust side breather set up doesn't have a PC Valve in it, It's connected to the intake before the turbo so it will always be in vacuum anyway and this is why it doesn't need a PCV. The reason the intake side one has a PCV is because the intake manifold encounters both negative and positive pressures so the PCV is needed to stop the positive pressures getting into the the crank case.

[Ca_Silvia]

Really? That is quite strange then because my car definatly has a PCV on the exhaust side. Ill just remove it and see how the car runs and go from there. Thanks!