Engine Emission Control

ENGINE EMISSION CONTROL

CAUTION: Do not permanently remove any part of the engine emission control system. Operating the engine without the engine emission control system intact will reduce fuel economy and engine ventilation. This will weaken engine performance and shorten engine life.

The engine emission control system consists of the:
- positive crankcase ventilation (PCV) system.

Positive Crankcase Ventilation (PCV) System
The PCV system:
- uses intake manifold vacuum to ventilate blow-by fumes from the crankcase.
- returns the fumes to the intake manifold for combustion.

The PCV system consists of the:
- PCV heater element.
- crankcase ventilation tube.
- PCV valve.

The PCV valve:
- varies the amount of blow-by gases returned to the intake manifold based on available engine vacuum.
- prevents combustion gases backfiring into the crankcase.
- utilizes an internal heater.

The PCV heater element:
- heats the ventilating air and blow-by gases going to the intake manifold.
- is retained by 2 self-tapping screws and mounted in the intake manifold.
- has an optional set of mounting holes located in the intake manifold.