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Home >> Honda >> 2005 >> S2000 L4-2.2L >> Repair and Diagnosis >> Engine, Cooling and Exhaust >> Cooling System >> Thermostat >> Testing and Inspection
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Thermostat: Testing and Inspection

Thermostat Test
Replace the thermostat if it is open at room temperature.
To test a closed thermostat:





1. Suspend the thermostat (A) in a container of water. Do not let the thermometer (B) touch the bottom of the hot container.
2. Heat the water and check the temperature with the thermometer. Check the temperature at which the thermostat first opens, and at which it is fully open.
3. Measure the lift height of the thermostat when it is fully open.
Standard Thermostat Lift Height:
Above 10.0 mm (0.39 inch)
Starts Opening: 169 - 176°F (76 - 80°C)
Fully Open: 194°F (90°C)


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