Thermostat Repair Procedures

Removal

1. 1
   Drain the engine coolant until its level is below the thermostat height. (Refer to Cooling System - "Coolant")
2. 2
   Remove the lower radiator hose (A).

   

3. 3
   Remove the water outlet (A).

   Tightening torque: 18.6 – 24 N·m

   

4. 4
   Remove the thermostat (A).

   

5. 5
   Install in the reverse order of removal.
6. 6
   Fill the radiator with water through the radiator cap and install the cap. (Refer to Cooling System - "Coolant")
7. 7
   Start the engine and check for leaks.
8. 8
   Recheck the engine coolant level.

Inspection

1. 1
   Immerse the thermostat in water and gradually heat the water.

   

2. 2
   Check the valve opening temperature. Valve opening temperature: 82 ± 1.5 °C Full open temperature: 95 °C If the valve opening temperature does not meet the specification, replace the thermostat.
3. 3
   Check the valve lift.

   Valve lift: 8 mm (0.3 in) or more at 95 °C

   If the valve lift is not as specified, replace the thermostat.