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 components. Clean debris from all housings and thermostat components.
Assembly
Assembly is essentially the reverse of disassembly. 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.
- Harness base screws
Loosen electrical harness connections as necessary to lift harness base away from the pressure relief valve.
Remove screws and cap from pressure valve assembly.
- Pressure valve cap screws
Remove the pressure valve housing.
Remove the pressure valve components.
Inspection
Inspect all components for cracks, heat damage, or signs of corrosion. Replace damaged components. Clean all debris from pressure relief valve components.
Assembly
Assembly is essentially the reverse of disassembly. Pay close attention when performing the fol lowing additional tasks.
Torque cap screws to 60 to 84 in. lbs. (7 to 9.5 N·m).
