Thermostat Inspection

Thermostat Inspection

Thermostat Removal and Installation

- Check that air bleed valve (1) of thermostat is clean.
- Check that valve seat (2) is free from foreign matters.





- Check thermostat valve operation using the following procedures:

a Immerse thermostat (1) in water, and heat water gradually.
b Check that valve is operating with the following specifications:

Temperature at which valve starts opening
80 - 84 °C (176 - 183 °F)

Temperature at which valve becomes fully open
95 °C (203 °F)

Thermostat valve lift
More than 8 mm (0.3 in) at 95 °C (203 °F)

If thermostat valve does not open as specified above, or sticks in any position, replace it.