Tracker Off-Road 800SX Service Manual page 77

MF111A
4. Install a 5 mm x 80 cap screw in the hole next to the
pinned hole on the intake camshaft drive gear and
tighten to secure the master and slave gears in posi-
tion; then rotate the camshafts to relieve the valve
spring pressure (approximately 1/3 turn).
MF097A
CAUTION
It is absolutely imperative to mark and note the posi-
tions and orientation of all valve train components for
proper installation when installing. Failure to do this
may result in accelerated component wear and com-
plete valve train adjustment. Adjacent moving compo-
nents wear against each other taking a "set."
Mismatching of adjacent wear parts will result in exces-
sive wear and, in the case of bearing caps, total compo-
nent failure.
5. Loosen the cap screws securing the camshaft bearing
caps to the cylinder head in the sequence shown to
allow the camshafts to unload evenly; then remove
the bearing caps noting their position and numbers
inscribed on the caps.
MF098A
MF099
NOTE: The numbers represent the position and the

arrows should be directed toward the drive end of the
camshafts.
NOTE: Expect the camshafts to rise up as the com-

pressed valve springs "unload" upon bearing cap
removal.
CAUTION
The camshaft bearing caps MUST be returned to their
original position and orientation or severe engine dam-
age will occur!
6. Remove the end plug from the intake camshaft and
the oil seal from the drive end of the exhaust cam-
shaft.
MF096B
7. Make sure the cap screw from step 4 is properly
installed; then carefully lift the camshafts from their
respective journals using caution not to lift unevenly
causing binding or galling of the camshaft bearing
surfaces.
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