Thermostat Repair Procedures

Removal

Removing the thermostat would adversely affect cooling performance, causing reduced cooling efficiency.

1. 1
   Drain the engine coolant until its level is below the thermostat height.
2. 2
   Remove the lower radiator hose. (Refer to Cooling System - "Radiator Hose")
3. 3
   Remove the water inlet connection (A) and the thermostat (B).

   

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 (179.6±2.7°F). Full opening temperature: 95°C (203°F). 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.

Installation

1. 1
   Install the thermostat in the block. Install the thermostat (B) with the jiggle valve facing up.
2. 2
   Install the water inlet pipe (A).

   Tightening torque: 18.6 ~ 24 N·m

   

3. 3
   Fill the engine coolant.
4. 4
   Start the engine and check for leaks.