Mazda 3 Service Manual: Thermostat Removal/Installation [Mzr 2.0, Mzr 2.5]

Mazda 3 Service Manual / Engine / Cooling / Thermostat Removal/Installation [Mzr 2.0, Mzr 2.5]

WARNING:

Never remove the cooling system cap or loosen the radiator drain plug while the engine is running, or when the engine and radiator are hot. Scalding engine coolant and steam may shoot out and cause serious injury. It may also damage the engine and cooling system.
Turn off the engine and wait until it is cool. Even then, be very careful when removing the cap. Wrap a thick cloth around it and slowly turn it counterclockwise 2.5 turns. Step back while the pressure escapes.
When you are sure all the pressure is gone, turn the cap using the cloth, and remove it.

1. Remove the battery cover..

2. Disconnect the negative battery cable..

3. Remove the plug hole plate..

4. Remove the aerodynamic under cover No.2 and splash shield as a single unit..

5. Drain the engine coolant..

6. Remove the generator drive belt with the A/C drive belt still installed and set it out of the way. (MZR 2.0).

7. Remove the drive belt. (MZR 2.5).

8. Remove the drive belt auto tensioner. (MZR 2.0).

9. Remove the idler pulley. (MZR 2.5).

10. Remove in the order indicated in the table.

11. Install in the reverse order of removal.

12. Refill the engine coolant..

13. Inspect for engine coolant leakage..

1	Water hose
2	Lower radiator hose
3	Thermostat component
4	Gasket

Thermostat Inspection [Mzr 2.0, Mzr 2.5]

1. Remove the thermostat.. 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 ...

Emissions

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Other materials:

Automatic Transaxle Fluid (ATF) Replacement [FS5 A EL]
WARNING: A hot transaxle and ATF can cause severe burns. Turn off the engine and wait until they are cool before changing the ATF. 1. Drain the ATF. a. Remove the oil dipstick. b. Remove the aerodynamic under cover NO.2.. c. Remove the drain plug and washer to drain the ATF in ...

Windshield Defrosting and Defogging
Set the mode selector dial to the position and turn the fan control dial to the desired speed. In this position, the outside air position is automatically selected, and when the fan control dial is ON, the air conditioner automatically turns on. The air conditioner will directly dehumidify ...

Dashboard Illumination
When the position lights are turned on with the ignition switched ON, the brightness of the instrument panel illumination is dimmed. NOTE When the position lights are turned on, the position lights indicator light in the instrument cluster turns on. Refer to Headlights on . The brightness ...