Cooling System (Mechanical): Cooling: Thermostat: Inspection

HINT:

The water inlet with thermostat is stamped with the valve opening temperature.

Fig 1: Identifying Thermostat Valve Opening Temperature

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1. Immerse the water inlet with thermostat in water and gradually heat the water.
2. Check the valve opening temperature.

   Standard valve opening temperature: 80 to 84°C (176 to 183°F) 

   If the valve opening temperature is not within the specified range, replace the water inlet with thermostat.

   Fig 2: Checking Valve Opening Temperature

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3. Check the valve lift.

   Standard valve lift: 10.0 mm (0.394 in.) or more at 95°C (203°F) 

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

4. Check that the valve is fully closed when the water inlet with thermostat is at a low temperature (below 77°C (171°F)).

   If it is not closed, replace the water inlet with thermostat.

   Fig 3: Checking Valve Lift

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