Corolla LE Sedan L4-1.8L (1ZZ-FE) (1999)
3. REMOVE WATER INLET AND THERMOSTAT
a. Disconnect the ECT switch connector.
b. Remove the 2 nuts, and disconnect the water inlet from the cylinder block.
c. Remove the thermostat.
d. Remove the gasket from the thermostat.
INSPECTION
INSPECT THERMOSTAT
HINT: The thermostat is numbered with the valve opening temperature.
a. Immerse the thermostat in water and gradually heat the water.
b. Check the valve opening temperature.
Valve opening temperature: 74.0 - 78.5°C (165 - 173°F)
If the valve opening temperature is not as specified, replace the thermostat.
c. Check the valve lift.
Valve lift: 10 mm (0.39 inch) or more at 90°C (194°F)
If the valve lift is not as specified, replace the thermostat.
d. Check that the valve is fully closed when the thermostat is at low temperatures (below 40°C (104°F)).
If not closed, replace the thermostat.
INSTALLATION