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18. Apply a very thin coat of si I icone sealer to
each
head
gasket; then
place head
w/gaskets
into
position
and
secure
with
eight
bolts,
lock
washers,
and
washers and
four nuts, lock
washers,
and washers.
Tighten in three steps to 3.0-4.0 kg-m
(22-29
ft-lb) using the
pattern
shown. Install the
spark plugs
and tighten to 2.5-3.0 kg-m
(18-22 ft-lb).
Fig.
2·89
©
.(@
®
0725·746
CAUTION
Make
sure the two large water passage holes in the
gaskets are on the intake side of the cylinders. If the
gaskets are improperly installed, severe engine
damage will result.
19. Test the
engine
for
following
procedure:
air
leaks using the
a. Install an intake-flange plug on each
flange and tighten the flange clamps
securely.
b. Place a rubber plug and cover on each
exhaust port and secure.
c. Connect a tester pump to the impulse
fitting
on
the
crankcase;
then
pressurize the crankcase to 12 lb and
close the valve.
•
Fig. 2-90
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----
CAUTION
DO NOT exceed 15 lb pressure or damage to the
seals will result
•
8331
d. Monitor the pressure gauge. Pressure
must not drop at a rate of more than 1 lb
per minute.
e. If the
pressure drops
faster than
specified, inspect for an air leak with
soapy water or completely submerge
the pressurized engine in clean fresh
water. Repair as needed.
20. Apply a very thin coat of silicone sealer to
both sides of the thermostat gasket; then
place
the
thermostat, gasket, and cap into
position. Secure with three bolts, lock
washers, and washers.
Fig. 2-91
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8316
21. Place the water pump, belt, and pulley into
position in the magneto case; then secure
the water pump to the magneto case with
five bolts, lock washers, and washers ..
31
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