300 V6-3.5L VIN G (2005)
Lifter / Lash Adjuster: Description and Operation
ROCKER ARM SHAFT/ ROCKER ARM LASH ADJUSTER
DESCRIPTION - ROCKER ARM
Rocker arms are made of light weight permanent mold aluminum alloy with a roller (3) type follower operating against the camshaft. The valve
actuating end of the rocker arms are machined to retain hydraulic lash adjusters, eliminating the need for manual valve lash adjustment.
DESCRIPTION - ROCKER ARM SHAFTS
The rocker arm shafts are tubular steel and are supported by several forged aluminum alloy pedestals, which are fastened to the cylinder head. Four
shafts are used, one for each intake and exhaust rocker arm bank on each cylinder head. The shafts are hollow to provide a duct for lubricating oil flow
from the cylinder head to the valve mechanisms. One hollow dowel per pedestal is used to locate the pedestal to the cylinder head, orient the exhaust
rocker shaft, and serve as a cam bearing oil feed passage.
OPERATION
The rocker arm is the pivot point between the camshaft lobe and the valve.