Thermostat Inspection

WARNING: This page is about a different car, the 2003 Mazda Protege5 and 2003 Mazda Protege. However, it is still accessible from the selected car via links, so may be relevant.

If the gasket of the thermostat is damaged, replace the thermostat assembly. (FS model)
Visually check that the thermostat valve is closed.
Place the thermostat and a thermometer in water.
WARNING:
- During inspection, the thermostat and water are extremely hot and they can cause severe burns. Do not touch the thermostat and water directly.
Fig 1: Inspecting Thermostat Gasket
Courtesy of MAZDA MOTORS CORP.
Heat the water and check the following.
- If not as specified, replace the thermostat.
Fig 2: Thermostat Opening Temperature Table
Courtesy of MAZDA MOTORS CORP.

Fig 3: Identifying Thermostat Opening
Courtesy of MAZDA MOTORS CORP.