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Home >> Toyota >> 2024 >> Corolla LE >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 5 (Engine Cooling System (2ZR-FXE) - Service Information) >> Thermostat >> Inspection [01/2019 - ] >> Procedure

Inspection [01/2019 - ]: Procedure

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  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
    1. Immerse the water inlet with thermostat sub-assembly in water and then gradually heat the water.
    2. Check that the valve of the water inlet with thermostat sub-assembly opens at the specified temperature.

      Standard Valve Opening Temperature

      80 to 84°C (176 to 183°F)

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

    3. Check the valve lift.
      GTY607853Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *A Compression Spring Shape: Tapered
      *B Compression Spring Shape: Straight
      *a Valve Lift
      *b Compression Spring

      Standard Valve Lift

      Compression Spring Shape Condition Specified Condition
      Tapered 95°C (203°F) 10 to 14 mm (0.394 to 0.551 in.)
      Straight 8 mm (0.315 in.) or more

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

    4. 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.