Service Manual
Valve
Clearance:
The
engine must be at room temperature when per-
forming
this test. Remove the valve cover. Remove
the
spark
plug. Turn the engine over until the piston
is
at
COMPRESSION
TOP
DEAD
CENTER. Check
the intake and exhaust valveclearance with a feeler
gauge.
If
the clearance is not as specified in
Dimen-
sions
and
Clearances,
loosen the lash adjusting nut
and
turn
the lash adjusting screw until the correct di-
mension is obtained. Tighten lash adjusting nut and
recheck
clearance measurement.
VT-1058
FIGURE 11-11.
MEASURING
VALVE
LASH
OIL
BASE
Shim as necessary to obtain the clearances speci-
fied in
Dimensions and Clearances.
Apply grease to the oil seal lip and make sure it's not
damaged when installing the oil base. Be sure the
oil pump shaft lines up with the slot on the balancer
shaft. Tighten the oil base mounting bolts in a clock-
wise pattern to the torque specified in
Assembly
Torques.
Torque the bolt first torqued once more.
Y
:Disassembly
Remove the oil pressure switch located next to the
.oil filter. Unscrew the oil base mounting screws. Tap
.the oil base with a plastic hammer. Remove
oil
base.
Do
not
pry
cover
off
with a screw driver chisel,
etc. Note where
ail
shims come
off
from.
Assembly
Install a new
oil
base gasket. Install shims in their
original locations (Figure
11-12).
If
the crankshaft,
camshaft
or
balancer shafts have been replaced,
use Plasti-gage to check their end clearances.
11-8
GOVERNOR
With the oil base removed, the governor can
be
in-
spected
or
disassembled for service. The governor
assembly must spin freely on the center pin without
excessive looseness
or
wobble. Sleeve tip wear is
the most common cause of governor failure. Check
for flat spots on the sleeve tip.
If
the governor
sleeve, gear, or flyweights are worn
or
damaged, re-
place them.
To disassemble, pull the governor gear assembly
off
the mounting shaft (Figure
11-13).
To assemble,
install the washer, gear assembly, and retainer onto
the shaft. Thread the sleeve between the flyweights
and push the assembly onto the shaft. See inset
drawing (Figure
11-13)
for position
of
flyweight and
sleeve.