Thermostat: Service and Repair
REMOVAL OF THERMOSTAT1. DRAIN ENGINE COOLANT
2. DISCONNECT RADIATOR OUTLET HOSE
3. REMOVE WATER INLET HOUSING AND THERMOSTAT
Remove the two nuts, water inlet housing, thermostat and gasket.
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 and valve lift. If the valve opening temperature and valve lift are not within the following specifications, replace the thermostat.
Valve opening temperature 80 - 84°C (176 - 183°F)
Valve lift: 8 mm (0.31 in.) or more at 95°C (203°F)
(c) Check that valve spring is tight when the thermostat is fully closed. Replace as necessary.
INSTALLATION OF THERMOSTAT
1. INSTALL THERMOSTAT AND WATER INLET HOUSING
Install a new gasket, the thermostat and water inlet housing with the two nuts.
2. CONNECT RADIATOR OUTLET HOSE
3. FILL WITH ENGINE COOLANT