Thermostat: Testing and Inspection

THERMOSTAT INSPECTION [MZI-3.7]

1. Remove the thermostat. Service and Repair

2. Visually check that the thermostat valve is closed.

3. Place the thermostat in water.

WARNING:
- During inspection, the thermostat and water are extremely hot and can cause severe burns. Do not touch the thermostat and water.

4. Heat the water and check the following.

- Opening temperature and valve lift

- If there is a malfunction, replace the thermostat. Service and Repair

Thermostat initial-opening temperature
- 79.5-83.3 °C {176-181 °F}

Thermostat full-open temperature
- 94.5 °C {202 °F}

Thermostat full-open lift
- More than 8.1 mm {0.32 in}