Removal Procedure

Fig 1: Locating Engine Drain Plug At Right Front Of Engine & Radiator Drain

IMPORTANT: During extremely cold weather, -12°C (+10°F) or colder, the engine's coolant temperatue will decrease quickly when idling with the heater fan on high speed, and cool air may flow from the heater outlet.

The fan control switch should be set at a slower speed position (fan speed I or II) to maintain the hottest air flow

Drain the coolant from the radiator and engine drain plug located at the right front of the engine
Disconnect the lower radiator hose at the thermostat housing. Use the J 43914 or equivalent

Fig 2: Thermostat & Inlet Housing

Remove the two bolts in the water inlet housing
Remove the water inlet housing and thermostat assembly
IMPORTANT: The O-ring gasket must be replaced whenever the thermostat housing is removed
Remove the O-ring.

Fig 3: Thermostat Element And Service Tool Provided With Replacement Element

IMPORTANT: The thermostat element should not be removed if the assembly requires testing
Remove the thermostat element using the service tool provided with the replacement element
NOTE: 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
Inspect the thermostat components for damage, seat deterioration, etc