Mazda 6 manuals

Mazda 6 Service Manual: Engine coolant

ENGINE COOLANT LEVEL INSPECTION

Verify that the coolant level in the coolant reservoir is between the F and L marks.

ENGINE COOLANT REPLACEMENT

Warning

1. Remove the radiator cap.


2. Remove the radiator drain plug.


3. Drain the coolant into a container.

4. Flush the cooling system with water until all traces of color are gone.

5. Let the system drain completely.

6. Tighten the radiator drain plug.

7. Fill the coolant into the reservoir up to the FULL mark on the coolant reservoir.

8. Fully install the radiator cap.

Caution

9. Start the engine and let it idle until the cooling fan operates.

10. After engine warms up, perform the following steps.

(1) Run the engine at 2,500 rpm

for 5 min.

(2) Run the engine at 3,000 rpm

for 5 s,

then return to idling.

(3) Repeat Step (2) several times.

(4) Run the engine at idle for 1 min.

11. Stop the engine and wait until it is cool.

12. Remove the radiator cap.

13. Check the coolant level.

14. Install the radiator cap.

15. Inspect for coolant leakage.

ENGINE COOLANT LEAKAGE INSPECTION

Warning

1. Inspect the coolant level.

2. Remove the radiator cap.

3. Clean the mounting surface of the rediator cap and the upper radiator hose.

4. Connect a radiator cap tester and the radiator cap tester

to the reservoir filler port.

5. Apply specified pressure to the radiator.

Pressure
127 kPa { 1.3 kgf/cm2, 18 psi}


6. Verify that the pressure is held.

- If the coolant leaks from the upper hose attachment part, replace the upper hose and the clamp.

- If the coolant leaks from the main body of the radiator (caulking part), replace the radiator.

Cooling system service warnings
COOLING SYSTEM SERVICE WARNINGS Warning Never remove the radiator cap or loosen the radiator drain plug while the engine is running, or when the engine and radiator are hot. Scalding coolan ...

Radiator cap
Warning Never remove the radiator cap while the engine is running, or when the engine and radiator are hot. Scalding coolant and steam may shoot out and cause serious injury. It may also dam ...

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