5-19.1. CAMSHAFT ASSEMBLY AND GEAR TRAIN - MAINTENANCE INSTRUCTIONS.
h. The clearance between the camshaft end
journals and the camshaft end bearing
bushings is .0025" to .004" or a maximum
of .006" with used parts. Undersize and
oversize camshaft end bearings are avail-
able for service.
Inspect the oil seal in the left bank
camshaft front end bearing for wear or
damage. Replace the seal if necessary.
Also, examine the spacer used at the front
end of each camshaft. The outside diameter
of the spacer used in the left bank front
end bearing must provide a smooth oil seal
contact surface. The outside diameter is
not ground and polished on the original
spacer used on the right bank camshaft in
current engines. Only the polished spacer
is available for service and may be used
in either position.
Replace excessively scored or worn
camshaft intermediate bearings. The
clearance between the camshaft journals
and the intermediate bearings is .0025" to
.005" with new parts, or a maximum of .009"
with worn parts. Undersize and oversize
camshaft intermediate bearings are avail-
able for service. Also, examine the
intermediate bearing lock screws and the
tapped holes in the cylinder block for
Examine the teeth on the water pump
drive gear and the camshaft gears for
scoring, pitting or wear. Replace the
gears if necessary. Also, examine the
keyways and tapped holes in the gears and
the camshaft pulley for damage.