Thermostat Inspection

WARNING: This page is about a different car, the 2005 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.

Visually inspect 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 badly burn. Do not touch the thermostat and water directly.

Heat the water and inspect the following.

If not as specified, replace the thermostat.

CONDITION ENGINE

Condition	Engine
Condition	L3	AJ
Initial-opening temperature (°C {°F})	80-84 {176-183}	84-88 {184-190}
Full-open temperature (°C {°F})	97 {206}	99 {210}
Full-open lift (mm {in})	More than 8.0 {0.31}	More than 7.3 {0.29}

Fig 1: Identifying Thermostat Valve Lift

Courtesy of MAZDA MOTORS CORP.