Thermostat: Service and Repair

REMOVAL
1. Drain the coolant down to thermostat level or below.
2. Remove the engine coolant outlet fitting and gasket.
3. Remove the thermostat.

INSPECTION





1. Heat the thermostat as shown in the illustration.
2. Check to see if the valve operates properly.
3. Check to determine the temperature at which the valve begins to open.
Valve opening temperature: 80.5-83.5°C (176.9-182.3°F)
Full opening temperature: 95°C (203°F)

INSTALLATION
1. Check to ensure that the flange of the thermostat is correctly seated in the socket of the thermostat housing. If the thermostat is installed in the wrong direction, the bottom of the thermostat will touch the rib inside the intake manifold, making it impossible to seat flange in position.
2. Install a new gasket and engine coolant outlet fitting.
Tightening torque:
Engine coolant outlet fitting bolt: 10-15 Nm (100-150 kg.cm, 7-11 ft. lbs.)
3. Refill the coolant.