PCV System

Positive Crankcase Ventilation (PCV) system prevents blow-by gases that build up in crankcase from escaping into atmosphere. Fresh air is routed to crankcase from throttle body and mixed with blow-by gases, then drawn back into intake manifold to be burned. PCV system consists of a valve cover baffle plate, PCV valve or orifice, and oil separator (most models). Oil separator removes oil particles from blow-by gases.