Crossfire V6-3.2L VIN L (2004)
Valve: Description and Operation
INTAKE/EXHAUST VALVES AND SEALS
DESCRIPTION
Two 1.42 inch (36 mm) intake valves and a single 1.61 inch (41 mm) exhaust valve per cylinder are operated by a double-width roller chain-driven
camshaft per bank using roller rocker arms. Lightweight hydraulic adjusters in the rocker arms at the valves take up valve clearance for quiet
operation. For minimum weight and maximum rigidity the compact rocker arms are pressure-cast aluminum. They pivot through roller bearings on
rocker shafts bolted to the heads. Using computer-aided measurement and calculation techniques, valve dynamics are equivalent to that achieved by
direct valve actuation through in-line tappets, but with far less friction.
OPERATION
The intake valve allows the air/fuel mixture to enter the combustion chamber. The exhaust valve allows the burned air/oil mixture to exit the
combustion chamber. Also, the intake and exhaust valves seal the combustion chamber during the compression and power strokes.
