12
Workshop Manual, TSD3450E, Issue 1 123
2800
To test the thermostats Operation 12-11
1 Remove the thermostats from the engine.
Warning! Use care during this operation to avoid serious injury from the hot water.
2 Heat water in a suitable container until the temperature is 98 °C (208 °F). Stir the water to ensure that the
temperature is consistent within the container.
3 Suspend the thermostat in the container of water. The thermostat must be below the surface of the water
and it must be away from the sides and the bottom of the container.
4 Ensure that the water is maintained at the correct temperature for ten minutes.
5 After ten minutes, remove the thermostat. Immediately check the distance that the thermostat has opened.
It must be a minimum of 10,4 mm (0.41 in). If the distance is less, renew the thermostat.
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