Mazda 3 Service Manual: Radiator Drain Plug Replacement [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 aerodynamic under cover No.2..

2. Drain the engine coolant..

3. Loosen the radiator drain plug completely.

4. Using a flathead screwdriver or equivalent, pry out the radiator drain plug.

CAUTION:

• Do not apply excessive force to the flathead screwdriver or equivalent as doing so can damage the drain bore. Slowly and carefully pry out the radiator drain plug when removing it.

5. Install a new radiator drain plug with a new O-ring.

Tightening torque

• 1.2—1.5 N·m {13—15 kgf·cm, 11—13 in·lbf}

6. Refill the engine coolant..

7. Inspect for engine coolant leakage..