THERMOSTAT INSPECTION

PROCEDURE

  1. INSPECT THERMOSTAT

    A313330E01
    Tip:

    The valve opening temperature is inscribed on the thermostat.

    Table 1. Text in Illustration

    *A

    for Type A

    *B

    for Type B

    1. Check that the valve is fully closed when the thermostat is at low temperatures (below 75°C (167°F)).

      If it is not fully closed, replace the thermostat.

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

    3. Check the valve opening temperature of the thermostat.

      Standard Valve opening temperature

      78 to 82°C (172 to 180°F)

      If the valve opening temperature is not as specified, replace the thermostat.

    4. A313331E01

      Check the valve lift.

      Standard Valve lift

      Item

      Condition

      Specified Condition

      for Type A

      93°C (199°F)

      10 mm (0.394 in.) or more

      for Type B

      95°C (203°F)

      10 to 14 mm (0.394 to 0.551 in.)
      Table 2. Text in Illustration

      *A

      for Type A

      *B

      for Type B

      If the valve lift is not as specified, replace the thermostat.