Valve: Description and Operation

DESCRIPTION
The four valves per cylinder are opened by using roller rocker arms with hydraulic lash adjusters which pivot on the rocker shafts. The valves have chrome plated valve stems. Viton rubber valve stem seals are integral with the spring seats.
The valve springs, spring retainers, and locks are 3-bead design.

OPERATION
The intake valve allows the air/fuel mixture to enter the combustion chamber. The exhaust valve allows the burned air/fuel mixture to exit the combustion chamber. Also, the intake and exhaust valves seal the combustion chamber during the compression and power strokes.