Positive Crankcase Ventilation: Description and Operation

Positive Crankcase Ventilation (PCV) System:

Positive Crankcase Ventilation (PCV) System

PCV System Description
- The Positive Crankcase Ventilation (PCV) system cycles crankcase gases back through the engine where they are burned.




PCV System Operation




PCV Valve
- Mounted in a vertical position.
- Regulates the amount of ventilating air and blow-by gas to the intake manifold and prevents backfire from traveling into the crankcase.