PCV System
NOTE:
Do not permanently remove or render inoperative any part of the vehicle emission control system including related hardware. Failure to comply may violate applicable state and federal law.
NOTE:
The vehicle emission vacuum routing diagrams are contained in the Description and Operation subsection of the Evaporative Emissions
article. Refer to
EVAPORATIVE EMISSIONS
.
The engine emission control system consists of the PCV system.
The PCV system:
- uses intake manifold vacuum to ventilate blow-by vapors from the crankcase.
- returns the vapors to the intake manifold for combustion.
The PCV system consists of the:
- crankcase vent oil separator.
- crankcase ventilation tube.
- PCV valve.
The crankcase vent oil separator:
- is retained by 3 bolts, mounted to the RH valve cover.
The crankcase ventilation tube:
- is connected to the PCV valve and intake manifold fitting with a quick connect coupling at each end.
The PCV valve:
- varies the amount of blow-by vapors returned to the intake manifold based on available engine vacuum.
- prevents combustion gases backfiring into the crankcase.
- threads into the crankcase vent oil separator, mounted on the RH valve cover.