PVC and catch can question

[Lew Silverman]

I'll make an assumption that we're talking about a "Positive Crankcase Ventilation" (PCV) valve here, and that it's picking up enough oil to make your exhaust emit a blueish fog. There are a few things I've tried to stop just what you're describing - one was a baffle underneath the grommet holding the valve to keep anything but vapor away from it OR some of the early Mopar's had a remote valve that sat in a hose mid-way between a plain plastic elbow and the vacuum fitting screwed into the intake manifold. Both seemed to work nicely at keeping the oil from entering the intake system. Good Luck!