ENGINE 3-35
CAMSHAFT
CAM WEAR
Worn-down cams are often the cause of mistimed valve opera-
tion resulting in reduced power output.
Measure the cam height H using the micrometer. Replace a
camshaft if the cams are worn to the service limit.
Cam height H
Service Limit: (IN.): 33.54 mm (1.320 in)
(EX.): 33.00 mm (1.299 in)
09900-20202: Micrometer (25 – 50 mm)
CAMSHAFT BEARING
Rotate the camshaft bearing outer races by finger to inspect for
abnormal play, noise and smooth rotation.
Replace the camshaft assembly, if there is anything unusual.
CAMSHAFT SPROCKET
Check the camshaft sprocket teeth for wear or damage. If any
defects are found, replace the camshaft sprocket and cam chain
as a set.
CYLINDER
DISTORTION
Check the gasket surface of the cylinder for distortion using a
straightedge and thickness gauge. Take clearance readings at
several places. If any reading exceeds the service limit, replace
the cylinder.
Cylinder distortion
Service Limit: 0.05 mm (0.002 in)
09900-20803:
Thickness gauge
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