Thermostat Inspection

Engine. Lexus Gs430, Gs300. Uzs190 Grs190
3Gr-Fse Cooling. Lexus Gs430, Gs300. Uzs190 Grs190

  1. INSPECT WATER INLET SUB-ASSEMBLY WITH THERMOSTAT

Thermostat -- Inspection



1. INSPECT WATER INLET SUB-ASSEMBLY WITH THERMOSTAT


Lexus Gs430, Gs300. Uzs190 Grs190.3Gr-Fse Cooling.Cooling System.Thermostat Inspection
HINT:
The water inlet sub-assembly with thermostat is stamped with the valve opening temperature.


    Lexus Gs430, Gs300. Uzs190 Grs190.3Gr-Fse Cooling.Cooling System.Thermostat Inspection

  1. Immerse the water inlet with thermostat in water and gradually heat the water.

  1. Check the valve opening temperature.

    Valve opening temperature:
    80 to 84°C (176 to 183°F)
    If the valve opening temperature is not as specified, replace the water inlet sub-assembly with thermostat.


    Lexus Gs430, Gs300. Uzs190 Grs190.3Gr-Fse Cooling.Cooling System.Thermostat Inspection

  1. Check the valve lift.

    Valve lift:
    8.0 mm (0.315 in.) or more at 95°C (203°F)
    If the valve lift is not as specified, replace the water inlet sub-assembly with thermostat.

  1. Check that the valve is fully closed when the water inlet with thermostat is at low temperature (below 40°C (104°F)).
    If not close, replace the water inlet sub-assembly with thermostat.