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 valve:

• varies the amount of blow-by gases returned to the intake manifold based on available engine vacuum.
• prevents the entry of combustion gases backfiring into the crankcase.
• is integral to the LH valve cover.
• is heated to prevent freezing.