Post by
T45 »
https://forums.nicoclub.com/t45-u41813.html
Tue Apr 08, 2008 1:27 pm
Any and all ports in the valve cover are pcv. There are 2 that link the covers together like a balance tube, there are 2 that go from the crankcase to the valve covers and 2 that let air in from the intake and 2 that suck it back out through the pcv check valve. One could plug them all up and just add breathers to the valve covers and the crankcase or let the crankcase vent to the valve covers and then vent the valve covers or use the catch can method. Best would to use a catch can but then run the catch can back to the intake to keep the crankcase and heads under vacuum. That way you have a vacuumed crankcase and pcv but without the nastiez.