value is 0.0254 mm (.001 in.), wear limit is 0.254
mm (0.010 in.).
ROCKER ARMS
The rocker arm shafts are hollow and are used as
lubrication oil ducts. The rocker arm and shaft
assembly on the right side of the engine has an oil
passage hole from the cylinder head located at the
third rocker shaft support pedestal. The rocker arm
and shaft assembly on the left side of the engine has
an oil passage hole from the cylinder head located at
the second rocker shaft support pedestal.
NOTE: To prevent air ingestion into lash adjusters,
avoid turning rocker arm assembly upside down.
CAUTION: Do not allow rocker arm assembly to
rest on lash adjusters, as damage may occur to
lash adjuster and plastic retainer.
The intake and exhaust rocker arms are different.
They should be identified before disassembling the
assembly (Fig. 136).
Check rocker arms for wear or damage (Fig. 137) :
• Roller scuffing or wear
• Shaft bore scuffing or wear
• Swivel pad on lash adjuster missing or broken
• Rocker arm showing signs of fatigue or cracking
• Roller axle protruding from arm
Replace assembly as necessary if any rocker arms
shows signs of wear.
CAUTION: Do Not remove lash adjuster from rocker
arm assembly. Damage to the adjuster and rocker
arm will result.
VALVE INSPECTION
(1) Clean valves thoroughly and replace burned,
warped and cracked valves.
(2) Measure valve stems for wear (Fig. 138). Refer
to Engine Specifications.
NOTE: Valve stems are chrome plated and should
not be polished (Fig. 138).
(3) Remove carbon and varnish deposits from
inside of valve guides with a reliable guide cleaner.
Fig. 135 Camshaft Inspection
1 – ACTUAL WEAR
2 – LEFT CAMSHAFT
3 – RIGHT CAMSHAFT
4 – BEARING JOURNAL
5 – LOBE
Fig. 136 Intake and Exhaust Rocker Arms—Left Side
Fig. 137 Rocker Arm/Lash Adjuster—Inspection
1 – RETAINER
2 – SWIVEL PAD
3 – ROLLER
LH 3.2/3.5L ENGINE 9 - 139
CLEANING AND INSPECTION (Continued)
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