Quote Originally Posted by Y33TREKker View Post
Trekky?

Anyway...

I was just going by your original post, and not the additional things you've now brought up. If you guys want to have yet another discussion regarding the various trains of thought regarding oil consumption in VX's, have at it.

But as I said, even if there is blowby, it still has to go through the PCV system for oil to get to the intake, which is what we're trying to figure out for p_justin.
Further discussion? Don't mind if I do, thanks!

Positive Crankcase Ventilation is exactly that, it allows for the ever-changing volume of air in the crankcase to be expelled and subequently replaced as the volume changes due to the reciprocating pistons in their bores. If you introduce an oil mist into that atmosphere, either due to oil being blown by the pistons rings or too much oil in the sump being contacted by the crank journals, that oil will find it's way out of the pcv system along with the air. A small amount of oil mist is normal, it is when it becomes excessive that you have the problem described...ultimately, it is the function of the pcv valve to regulate or control the volume of air entering or leaving the crankcase, not to separate oil from that air. Provided all internal baffles are in place to impede the flow of normal oil mist, a catch can is not required.

Hope that helps!