| TIBURON(GK) >2004 > G 2.0 DOHC > Emission Control System > Crankcase Emission Control System > Positive Crankcase Ventilation (PCV) Valve>Description and Operation |

OPERATION
Intake manifold side (No vacuum) Rocker cover side | Intake manifold side (High vacuum) Rocker cover side
Engine condition | Not running | Engine condition | Idling or decelerating
PCV valve | Not running | PCV valve | Fully operating
Vacuum passage | Restricted | Vacuum passage | Small
Intake manifold side (Moderate vacuum) Rocker cover side | Intake manifold side (Low vacuum) Rocker cover side
Engine condition | Normal operation | Engine condition | Accelerating and high load
PCV valve | Properly operating | PCV valve | Slightly operating
Vacuum passage | Large | Vacuum passage | Much large