Thermostat Inspection

Engine Hybrid System. Corolla. Zre142 Aze141
2Zr-Fe Cooling. Corolla. Zre142 Aze141

  1. INSPECT THERMOSTAT

Thermostat -- Inspection



1. INSPECT THERMOSTAT


Corolla. Zre142 Aze141
HINT:
The valve opening temperature is inscribed on the thermostat.


    Corolla. Zre142 Aze141

  1. Immerse the thermostat in water and then gradually heat the water.

  1. Check the valve opening temperature of the thermostat.

    Standard valve opening temperature:
    80 to 84°C (176 to 183°F)
    HINT:
    If the valve opening temperature is not as specified, replace the thermostat.


    Corolla. Zre142 Aze141.2Zr-Fe Cooling.Cooling System.Thermostat Inspection

  1. Check the valve lift.

    Standard valve lift:
    10 mm (0.39 in.) or more at 95°C (203°F)
    HINT:
    If the valve lift is not as specified, replace the thermostat.

  1. Check that the valve is fully closed when the thermostat is at low temperatures (below 77°C (171°F)).

    HINT:
    If it is not fully closed, replace the thermostat.