Positive Crankcase Ventilation System
OverviewPCV System:
All engines are equipped with a Positive Crankcase Ventilation (PCV) system. The function of the PCV system is to circulate blow-by gases from the engine crankcase to the engine intake.
The PCV system consists of:
^ PCV valve
^ ventilation hose
The Positive Crankcase Ventilation (PCV) System cycles crankcase gases back through the engine where they are burned. The PCV valve regulates the amount of ventilating air and blow-by gas to the intake manifold and prevents backfire from traveling into the crankcase. The PCV valve should be mounted in a vertical position. On some applications, the PCV system is connected to the evaporative emission system (refer to the VECI decal).
CAUTION: Do not remove the PCV system from the engine. Removal of the PCV system will adversely affect the fuel economy and engine ventilation and result in shorter engine life.
HARDWARE
PCV Internal Drawing:
Typical PCV Vacuum Connector:
