Thermostat: Service and Repair

COMPONENTS:

REMOVAL

WATER TEMPERATURE CONTROL ASSEMBLY
1. Drain the engine coolant.
2. Remove the air cleaner assembly.





3. Disconnect the radiator upper and lower hose (A, (B).
4. Disconnect the ECT (Engine Coolant Temperature) sensor connector.
5. Remove the coolant hose related to the heater hoses and the ECT (Engine Coolant Temperature) system.
6. Remove wiring protector.





7. Remove water temperature control assembly (A) and the gaskets (B).





8. Remove the water pipe (A).

THERMOSTAT

NOTE: Removal of the thermostat would have an adverse effect, causing a lowering of cooling efficiency. Do not remove the thermostat, even if the engine tends to overheat.

1. Drain engine coolant so its level is below thermostat.





2. Remove the coolant inlet pitting (A) and the thermostat (B).

INSTALLATION

WATER TEMPERATURE CONTROL ASSEMBLY





1. Install the water pipe (A).





2. Install the water temperature control assembly (A) with a new gasket (B).

NOTE: Use new O-rings and wet them with water or coolant when reassembling.

3. Install the wiring protector.
4. Connect the heater hose and ECT hose.
5. Connect the ECT sensor connector.





6. Connect the radiator upper and the lower hose (A).
7. Install the air cleaner assembly.
8. Fill with engine coolant.
9. Start engine and check for leaks.
10. Recheck engine coolant level.

THERMOSTAT





1. Place thermostat (B) in coolant inlet pitting (A). Install the thermostat with the jiggle valve upward.
2. Install the coolant inlet pitting (A).
Tightening torque 16.66 - 19.60 Nm (1.7 - 2.0 kgf.m, 12.30 - 14.47 ft. lbs.)
3. Fill with engine coolant.
4. Start engine and check for leaks.