Tracker Off-Road 800SX, Service Manual

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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
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.
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.
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.
CAUTION
The camshaft bearing caps MUST be returned to their
original position and orientation or severe engine dam-
age will occur!