Thread: How do you choose the correct PCV valve?

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Originally Posted by joeybsyc

Does it matter if the PCV valve is actually "in" the valve cover? I have one of those "breather looking" push in deals with the tube out the side.. I call it this because although it looks like a breather, there are no holed in the bottom of it like a standard push-in breather has, just the tube coming out the side and a solid bottom. i have a hose connected to the tube, and a PCV inline between the valve cover and the carb... seems to work, but i still get a little oil that seeps around the breather.

No.

Here's mine sitting on top of an oil/air separator I made.
An SBC PVC fwiw, one of the performance models.

Look inside the PVC if you can, you'll see a number which correlates to the opening vacuum level.

The angle on the drain/return hose was changed so residual oil would drain back by gravity.

And a pic of a couple of the home-made fittings I made that go in the Buick's PVC grommet on the intake manifold.
The 90 degree model was used so the drain/return hose would run downhill.
The PCV in the pic with the fittings is a stock 455 Buick.

The straight one required the hose be curved and that sat it up too high fr proper drainback.