ROCKER ARMS
DESCRIPTION
Rocker arms are made of light weight permanent
mold aluminum alloy with a roller type follower oper-
ating against the camshaft (Fig. 7). The valve actu-
ating end of the rocker arms are machined to retain
hydraulic lash adjusters, eliminating the need for
manual valve lash adjustment.
OPERATION
The rocker arm is the pivot point between the cam-
shaft lobe and the valve.
INTAKE MANIFOLD
DESCRIPTION
The composite upper intake manifold is a cross-
flow type with long runners to improve air charge
inertia (Fig. 8). An active Short Runner Valve (SRV)
opens during certain operating conditions to improve
top end performance. A Manifold Tuning Valve (MTV)
connects the plenums at specific engine speeds to
maximize low RPM torque without reducing high
RPM power.
The aluminum lower intake manifold attaches to
each cylinder head and uses a gasket for sealing (Fig.
9). The manifold coolant passage allows coolant to
flow between cylinder heads. An attached steel tube,
allows coolant flow to the heater.
Fig. 6 Rocker Arms and Shafts
Fig. 7 Rocker Arm Assembly
1 – RETAINER
2 – SWIVEL PAD
3 – ROLLER
Fig. 8 Upper Intake Manifold
1 – INTAKE MANIFOLD-UPPER
2 – BOLT
9 - 80 3.2/3.5L ENGINE LH
DESCRIPTION AND OPERATION (Continued)
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