Thermostat Removal / Installation - 4.0L

Fig 1: Removing/Installing Thermostat With Torque Specifications

Courtesy of MAZDA MOTORS CORP.

1. Partially drain the engine coolant. See ENGINE COOLANT REPLACEMENT - 4.0L  .
2. Remove the air cleaner outlet tube.
3. Remove the upper radiator hose extension.
   Fig 2: Removing Upper Radiator Hose Extension

   Courtesy of MAZDA MOTORS CORP.
4. Remove the bolts, the water outlet adapter and the thermostat.
   Fig 3: Removing/Installing Bolts With Torque Specifications

   Courtesy of MAZDA MOTORS CORP.
   • Inspect the O-ring seal. Install a new O-ring seal if necessary.
5. To install, reverse the removal procedure.
   • Fill radiator with specified amount and type of engine coolant and bleed the cooling system. See ENGINE COOLANT REPLACEMENT - 4.0L  .