Thread: eliminating the pcv?

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You will get blow-by causing positive crankcase pressure unless you relieve it some how, no breathers or PCV valve.... oil leaks. Breathers on each valve cover will do, however if the breathers do not catch vapors you will end up with an oily film on the valve covers. The PCV valve captures these vapors and routes them back into the combustion chambers. What you put on the other side will make the system either open or closed. Breather = open, line to the air cleaner = closed. Either will work I like a closed system