94
6. Remove the bearing retaining screw (Fig
ure
83), then
withdraw the camshaft.
7. Remove the valve lifters and mark them so they may
be reinstalled in their original locations.
8. Check the rear bearing journal and lobes for signs
of
wear or
sconng
.
NOTE
If
precision measuring equipment is not
available,
have
a dealership
or
machine
shop
perform Step 9.
9. Measure the rear camshaft journal diameter and lobes
(Figure 84) and compare the measurement 10the specifi-
cation in Table I. Replace the camshaft
if
the journal or
lobes do not meet specifications.
10. Measure the stem diameter
of
the valve lifters and
compare the measurement to the specification in Table I.
Measure the lifter bores in the cylinder block. Calculate
the lifter clearance and compare it with the specification
in T
ab
le L Replace the valve lifters
if
they do not meet
specifications. Replace the valve lifter
if
the lifter face is
scored, galled, excessively worn or otherwise damaged.
CHAPTER
FIVE
Fuel transfer
pump lobe
Intake valve
lo
be
Exhau st
valve
lobe
11. Replace the ball bearing
if
it is damaged or feels
rough during rotation.
12. Installation is the reverse
of
removal . Note the fol-
lowing:
a. If installing a new camshaft, coat the camshaft lobes
with camshaft break-in lubricant. Ifrcinstalling tbc
original camshaft, apply heavy oil to the camshaft
lobes.
b. Lubricate the camshaft bearing journal with heavy
engine oil before reinstallation.
c. Lightly tap the end
of
the camshaft to seat the ball
bearing in the engine. Rotate the camshaft 10be sure
it rotates freely.
d. Align the timing marks (Fig
ure
78) on the camshaft
and crankshaft gears when installing the camshaft
gear.
c. Install the fuel injection cam so the side marked
with a zero is out (Figure 85).
f. Check gear backlash by installing a dial indicator as
shown in Figure 79 or by rotating the gear teeth
with soft solder between the gear teeth. Compare
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