Removal

IMPORTANT: During extremely cold weather, 10° F (-12° C) or colder, your engine's coolant temperature will decrease quickly when idling with the heater fan on high speed and cool air may flow from the heater outlets. The fan control switch can be set at a slower speed position (fan speed I or II) to maintain the hottest air flow.


Removal





1. Drain coolant from the radiator (1) and engine drain plug (2) located at the right front of engine.
2. Disconnect lower radiator hose at thermostat housing. Use Snap-on Tool HCP10 or 20 (or equivalent).





3. Remove two bolts in water inlet housing.
4. Remove water inlet housing and thermostat assembly.
5. Remove O-ring.

IMPORTANT:
^ The O-ring gasket must be replaced whenever the thermostat housing is removed.
^ The thermostat element should not be removed if the assembly requires testing.





6. Remove the thermostat element using the service tool provided with the replacement element.

NOTICE: The thermostat will not function correctly once it is contacted by oil. If oil is found in the cooling system, it must be flushed and the thermostat's cartridge replaced.

7. Inspect the thermostat components for damage, seat deterioration, etc.