Engine Coolant Leakage Inspection - Mazda 6 2002 Workshop Manual

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.
• If It is low, repeat Steps 6—9.
14. Install the radiator cap.
15. Inspect for coolant leakage.
• If not as specified, repair or replace the radiator cap.
End Of Sie

ENGINE COOLANT LEAKAGE INSPECTION

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 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 to the first stop. Step back while
the pressure escapes.
• • • • When you are sure all the pressure is gone, press down on the cap using the cloth, turn it, and
remove it.
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/cm
6. Verify that the pressure is held.
• If not, inspect the system for coolant leakage.
— 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.
End Of Sie
E–4
ENGINE COOLANT
2
, 18 psi}
A6E361215001W04
AME3612W003