PCV System
WARNING: This page is about a different car, the 2009 Mercury Sable, 2009 Ford Taurus X, and 2009 Ford Taurus. However, it is still accessible from the selected car via links, so may be relevant.
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 (early build engines only).
- 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 (early build engines only).
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.