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Timing Gears
Check each gear
for
incor-
rect wear and damage, and if
defective replace.
Camshaft
Measure the clearance between the camshaft journals
(both front and
rear)
and the shaft hole in the crankcase, and if the clearance is
excessive, replace the camshaft or crankcase.
If the cam face is damaged or the cam lobe is worn in excess of the
service limit, replace the camshaft.
Check the slot for driving the oil pump for any wear, and if the wear
is excessive, replace.
Tappet
Check the bottom of the tappet (the surface contacting the cam), and
replace the tappet if the bottom is excessively cracked, spalled or
streaked.
Push Rod
Replace if the wear at both ends is
excessive.
Place the push rod on a surface plate
and measure the bend in the center,
and
if
it
is excessively bent over
the
standard
value,
repair
or
replace.
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