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Home >> Lexus >> 2024 >> TX 350 Base, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 72 (Engine Cooling System (2GR-FXS) - Service Information) >> Thermostat >> Inspection [12/2023 - ] >> Procedure

Inspection [12/2023 - ]: Procedure

WARNING: This page is about a different car, the 2024 Lexus TX 550h+. However, it is still accessible from the selected car via links, so may be relevant.
  1. INSPECT WATER INLET WITH THERMOSTAT SUB-ASSEMBLY 
    WARNING:
    • Do not put your hands into the water that has been heated for the inspection.
    • Touching the heated water could result in burns.
    GTY547274Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    HINT: 

    The valve opening temperature is inscribed on the water inlet with thermostat sub-assembly.

    GTY1238620Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Pre-procedure1

    • Immerse the water inlet with thermostat sub-assembly in water and then gradually heat the water.
      NOTE:

      Do not allow any water to come into contact with the connector of the water inlet with thermostat sub-assembly.

    • Check that the valve of the water inlet with thermostat sub-assembly opens at the specified temperature.

      Standard Valve Opening Temperature

      Specified Condition
      80 to 84 °C
      176 to 183 °F

      If the result is not as specified, replace the water inlet with thermostat sub-assembly.

    • Check the valve lift.
      GTY1235950Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Valve Lift

      Standard Valve Lift

      Condition Specified Condition
      95°C (203°F) 10 mm or higher
      0.394 in. or higher

      If the result is not as specified, replace the water inlet with thermostat sub-assembly.

    • Check that the valve is fully closed when the water inlet with thermostat sub-assembly is at low temperatures (below 77 °C (171 °F)).

      If it is not fully closed, replace the water inlet with thermostat sub-assembly.

    Post-procedure1

    • None