Thermostat: Service and Repair
REMOVAL OF THERMOSTAT1. DRAIN COOLANT
2. REMOVE WATER INLET HOUSING COVER AND THERMOSTAT
Remove the two nuts, the housing cover and thermostat from the water inlet housing.
INSPECTION OF THERMOSTAT
NOTE: The thermostat is numbered according to the valve opening temperature.
(a) Immerse the thermostat in water and heat the water gradually.
(b) Check the valve opening temperature.
Valve opening temperature: 80 - 84°C (176 - 183°F)
If the valve opening temperature is not within specification, replace the thermostat.
(c) Check the valve lift.
Valve lift: 8 mm (0.31 in.) or more at 95°C (203°F)
If the valve lift is less than specification, replace the thermostat.
(d) Check that the valve spring is tight when the thermostat is fully closed.
If necessary, replace the thermostat.
INSTALLATION OF THERMOSTAT
1. PLACE THERMOSTAT IN WATER INLET HOUSING
Install a new gasket to the thermostat and align the jiggle valve of the thermostat as shown in the water inlet housing
2. INSTALL WATER INLET HOUSING COVER
Install the water inlet housing cover with the two nuts.
3. REFILL WITH COOLANT
4. START ENGINE AND CHECK FOR LEAKS