I don't fully understand the function of my T1 PCV valve, please advise.
1)a large diameter tube runs from the valve cover to air box, most excess crankcase gas will flow via this route.
2)on the above tube is where the PCV valve sits. So when the valve sticks or pcv valve gets twisted sideways this allows air to get past the PCV valve shutoff and flow into the intake manifold via a tube connected to the intake compressor housing. And as expected the engine idle increases to 2,000 RPM. The issue of the tilting PCV valve has increased in frequency since I changed from an older 87 Valve cover to a new one piece gasket design. Yes I have several new and used PCV valves
So why did the engineers do this? I am unclear why unless a federal regulation states that the car must have a PCV valve in this configuration. I am planing to block the PCV valve to scroll flow.
Thoughts/comments?