TEMPERATURE SENDER SERVICING
Removal
Loosen sensor and remove by hand. Use care to avoid breaking threads.
Clean sensor threads, sensor, and sensor cavity.
Installation
Fill bottom of sensor cavity with 0.7 cc of Thermal Joint Compound, P/N 322170. Sensor cavity should be filled to 1 inch (25 mm) below the top edge of the cavity.
Install sensor. DO NOT use gasket sealing com pound. SLOWLY tighten temperature sensor to a torque of 50 to 70 in. lbs. (5.6 to 8.0 N·m).
- Temperature sensor
- Sensor cavity
- Thermal joint compound
Wait 10 minutes for trapped air to bleed from cavity. Thermal compound may seep past threads. Retighten sensor.
THERMOSTAT SERVICING
Disassembly
Remove the thermostat cover and O-ring from cylinder head.
Remove spring, thermostat, and gasket.
Remove the cylinder head if cylinder head ther mostat seal requires replacement. Place new seal in the cylinder head with side marked “TO CYL HEAD” facing thermostat. Refer to Cylinder Head Installation on p. 245.
- Cylinder head seal
Inspection
Inspect all parts for cracks, heat damage, or signs of corrosion. Replace damaged parts. Clean debris from housing and parts.
Assembly
Assembly is the reverse of disassembly. Pay close attention when performing the following additional tasks.
Coat threads of thermostat cover with Gasket Sealing Compound and install new O-ring. Install and tighten cover to a torque of 120 to 144 in. lbs. (13.5 to 16 N·m).
PRESSURE RELIEF VALVE SERVICING
The pressure relief valve assembly should be serviced at the same time as the thermostat.
Disassembly
Remove screws and cover from pressure valve assembly.
Remove the pressure relief valve assembly.
