Bermaz Technical Service Information BR072/19
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Bermaz Motor Trading Sdn Bhd (9529-K)
No 7, Jalan Pelukis U1/46, Temasya Industrial Park, Seksyen U1, 40150 Shah Alam, Selangor Darul Ehsan, Malaysia
Tel : +60 (3) 7627 8888 Fax : +60 (3) 7627 8890
Website: www.mazda.com.my
•The lower radiator hose is getting hot when the thermostat is opened.
•Use a thick cloth or gloves when touching the hose.
Refer to the Workshop Manual “THERMOSTAT INSPECTION” for thermostat opening temperatures.
27. Mix the coolant in the cooling system using the following steps:
NOTE:
•Below A) B) are sample from a certain CX-5 (KE).
•Refer to the Workshop Manual “ENGINE COOLANT REPLACEMENT”.
A) Run the engine at 2,500 rpm for 5 min.
B) Maintain the engine speed at 3,000 rpm for 5 seconds, then allow the engine to idle.
28. Drain the coolant and repeat the step 24-27 to replace the coolant at the second time.
29. Allow the engine to cool down.
30. Replace the coolant in the reservoir tank with new FL22.
31. Inspect the engine coolant and reservoir tank levels and adjust with new FL22 as needed.
32. Verify repair that the heater system performs sufficiently.
<HEATER CORE REPLACING PROCEDURE>
Perform only when a Circulation Pump is NOT available in the market.
NOTE:
•Since all of the deteriorated old coolant cannot be drained out by one time, do the coolant replacement twice.
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 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. Replace the heater core with a new one according to the procedure in the workshop manual “A/C
UNIT REMOVAL/INSTALLATION” and “A/C UNIT DISASSEMBLY/ASSEMBLY”.
2. Make sure the radiator cap is removed, then drain the coolant from the radiator drain plug as much as
possible.
3. Tighten the radiator drain plug.
4. Refill the cooling system with FL22 (55% premix) coolant at the radiator filler neck until it is close to
the top of the filler neck.
NOTE:
•Do not use water to adjust the coolant concentration.
•Minerals contained in the water may generate deposits causing clogging of the cooling
system and rust on the parts.
•Service coolant (FL22 55% pre-diluted) using a specified quality of water is the solution.
5. Install the radiator cap.
