Tracker Off-Road 800SX Service Manual page 78

NOTE: It is recommended to loosely install the cam-

shaft bearing caps in their original positions to pre-
vent mixing up while performing other related
operations.
MF160
8. Inspect the camshaft bearing surfaces in the cylinder
head and the bearing caps for signs of scoring, gall-
ing, or heat damage. If damaged, the engine must be
replaced.
MF099
9. Inspect the camshaft bearing journals and caps for
scoring, flaking, galling, or signs of heat damage. If
damage is present, the cylinder head will have to be
replaced (see REMOVING AND INSTALLING
CYLINDER HEAD in this section).
MF100A
10. Inspect the camshaft lobes for flaking, galling, scor-
ing, or bluing indicting heat build-up. If damaged or
worn beyond limits, camshafts will have to be
replaced.
76
MF101A
11. Inspect the camshaft drive gears for excessive wear,
chipped or missing teeth, and security to the cam-
shafts. Replace as required.
MF100B
12. Inspect the valve buckets and adjustment shims for
scoring, flaking, excessive wear, or discoloration.
Replace as required.
NOTE: When removing, make sure to mark loca-

tions and orientation of valve buckets related to posi-
tion in the cylinder head keeping buckets and their
respective shims together.
13. Install valve buckets and shims in locations as
marked during disassembly and inspection.
NOTE: If parts are mixed up or replaced, it will be

necessary to perform valve clearance checks and
adjustments as required for any replaced and adja-
cent components.
MF107
14. Install the camshaft drive seal; then install camshafts
aligning timing punch marks as shown.