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Home >> Mitsubishi >> 2014 >> Lancer ES Sportback >> Repair and Diagnosis >> External Pages >> Different car >> Section 49 (Engine Cooling System) >> Thermostat >> Inspection >> Thermostat Check

Thermostat Check

WARNING: This page is about a different car, the 2014 Mitsubishi Outlander. However, it is still accessible from the selected car via links, so may be relevant.
  1. Immerse the thermostat in water, and heat the water while stirring. Check the thermostat valve opening temperature.

    Standard value: 

    Valve opening temperature: 

    87 ± 1. 5°C (189 ± 3°F) < 2. 4 L Engine > 

    82 ± 1. 5°C (180 ± 3°F) < 3. 0 L Engine > 

    Fig 1: Checking Thermostat
    G09664629
  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) 

    Amount of valve lift: 

    8. 5 mm (0.335 inch) or more < 2. 4 L Engine > 

    9.0 mm (0.354 inch) or more < 3. 0 L Engine > 

    Fig 2: Identifying Thermostat Valve Lift Amount
    G09664630