233
COOLING SYSTEM
THERMOSTAT SERVICING
9
THERMOSTAT
SERVICING
Disassembly
Remove the thermostat cover and O-ring from
each cylinder head. Remove each thermostat.
Inspection
Inspect all components for cracks, heat damage,
or signs of corrosion. Replace damaged compo-
nents. Clean debris from all housings and thermo-
stat components.
Assembly
Assembly is essentially the reverse of disassem-
bly. Pay close attention when performing the fol-
lowing additional tasks.
Coat threads of each cylinder head thermostat
cover with Gasket Sealing Compound. Install and
tighten the cover to a torque of 120 to 144 in. lbs.
(13.6 to 16.3 N·m).
PRESSURE RELIEF
VALVE SERVICING
Pressure relief valve assembly should be serviced
at the same time as the thermostats.
Disassembly
Remove the EMM. Refer to EMM SERVICING on
p. 153.
Remove the four screws holding the electrical har-
ness base.
Loosen electrical harness connections as neces-
sary to lift harness base away from the pressure
relief valve.
Remove screws and cap from pressure valve
assembly.
Remove the pressure valve housing.
005394
000756
1. Harness base screws 005378
1. Pressure valve cap screws 005395
1
1
11
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