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Home >> Mitsubishi >> 2010 >> Lancer ES, Standard >> Repair and Diagnosis (Single Page) >> Engine Mechanical >> Cooling System (Mechanical) >> Engine Cooling -- Lancer >> Thermostat >> Inspection >> Thermostat Check

Thermostat Check

  1. Immerse the thermostat in water, and heat the water while stirring. Check the thermostat valve opening temperature.

    Standard value: 

    82 ± 1.5°C (180 ± 3°F) <2.0L ENGINE Non-turbo, 2.4L ENGINE> 

    76.5 ± 1.5°C (170 ± 3°F) <2.0L ENGINE Turbo> 

    Fig 1: Cthermostat Valve Opening Temperature
    G06671770Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
  2. Check that the amount of valve lift is at the standard value when the water is at the full-opening temperature.
    NOTE: Measure the valve height when the thermostat is fully closed, and use this measurement to compare the valve height when the thermostat is fully open.

    Standard value: 

    Full-opening temperature: 

    95°C (203°F) <2.0L ENGINE Non-turbo, 2.4L ENGINE> 

    90°C (194°F) <2.0L ENGINE Turbo> 

    Amount of valve lift: 8.5 mm (0.33 inch) or more 

    Fig 2: Checking Valve Lift
    G06671771Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
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