Positive Crankcase Ventilation: Description and Operation

1.6L SOHC VTEC-E, 1.6L SOHC VTEC, 1.6L DOHC VTEC:

1.6L SOHC Non-VTEC:

Description
The Positive Crankcase Ventilation (PCV) system is designed to prevent blow-by gas from escaping to the atmosphere. The PCV valve contains a spring-loaded plunger. When the engine starts, the plunger in the PCV valve is lifted in proportion to intake manifold vacuum and the blow-by gas is drawn directly into the intake manifold.