Removal and Installation

Drain the engine Cooling System. Refer to COOLING SYSTEM DRAINING, FILLING AND BLEEDING .
Remove the air cleaner outlet tube.

Fig 1: Locating Five Hoses From Thermostat Housing
Courtesy of MAZDA MOTORS CORP.
Disconnect the five hoses from the thermostat housing and remove the thermostat housing.

Fig 2: Locating Engine Coolant Temperature (ECT) Sensor
Courtesy of MAZDA MOTORS CORP.
Disconnect the engine coolant temperature (ECT) sensor from the bypass tube.

Fig 3: Locating Removal Bolt & Stud
Courtesy of MAZDA MOTORS CORP.
Remove the bolt, stud, and the water bypass tube.
NOTE:
- Clean and inspect the sealing surfaces.
To install, reverse the removal procedure.