Service Manual
Assembly
CAUTION
Over torquing
bolts
can cause en-
gine damage.
Do
not over torque nuts.
Refer to Figure
11-2.
Install a new cylinder head
gasket. Position cylinder head on engine and posi-
tion rocker arm, bolts, and washers in positions
shown. Make sure push rods are properly installed
in tappets and rocker arm. tighten cylinder head
bolts
to
the torque specified in
Assembly
Torques
in
the order: bolt
1,
bolt
2,
bolt
3,
bolt
4,
bolt
5,
bolt
6.
Bolts
2
and
4
must be retorqued after all bolts are
torqued. Adjust valve clearance. Remove the
gasket from valve cover. Install the breather in the
cylinder head. Install a new valve cover gasket and
tighten valve cover capscrews in a two-step cross
pattern to the torque specified in
Assembly
Torques.
VALVE SYSTEM
This engine uses an overhead valve design, shown
in figure
11-3.
A
properly functioning valve system is
essential for good engine performance. Use the fol-
lowing procedures to inspect and service the valve
system.
Tappets
Very little wear takes place on tappet diameters
or
in
tappet bores.
If
the clearance between tappet and
bore in the cylinder block exceeds specifications,
replace the tappet.
Inspect the tappet faces which contact camshaft
lobes
for
roughness, scuffing,
or
concave wear. Re-
place any worn tappets. If tappets are worn, inspect
the camshaft
for
wear.
Valves, Springs, Guides
Disassembly
Refer to Figure
11-3.
Compress valve springs and
pull out the valve locks. Remove the valve spring
retainer, valve spring, washer and valve.
VALVE
LOCKS
VALVE SPRING INTAKE SEAL STOPPER
CYLINDER
HEAD INTAKE VALVE
VALVE SPRING RETAINER WASHER VALVE GUIDE VALVE SEAT EXHAUST VALVE
11-4