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Coolant
Checking Whether Coolant Deteriorates
●Visually check the coolant in the fluid storage tank.
★If white cotton-wool flotages are observed, it indicates that the aluminum parts inside the cooling system have been
corroded. If the coolant is brown, it indicates that the iron parts or steel parts rust. When any one of above situations occurs,
please clean the cooling system.
★If the coolant emits odor, check whether there is air leakage in the cooling system. Because there may be some exhaust
gas in the cooling system.
Checking Coolant Level
●See "Checking Coolant Level" in the "Regular Maintenance" chapter.
Discharging Coolant
●See "Replacing Coolant" in the "Regular Maintenance" chapter.
Adding Coolant
●See "Replacing Coolant" in the "Regular Maintenance" chapter.
Detecting Pressure
●Remove the radiator cap and install the pressure meter [A] of
cooling system on the filler.
Remark
○Wet the sealing surface of radiator cap with water or coolant to
prevent pressure leakage.
●Increase the pressure in the system gradually until the pressure
reaches 123kPa
Note
The pressure shall not exceed the maximum system design
pressure during detection. The maximum pressure is 123kPa
●Observe the pressure meter at least 6 seconds.
★If the pressure is stable, the system is normal.
★If the pressure decreases and no external problem is found, check for internal air leakage. If it is found that a small
amount of oil is mixed in the coolant, it indicates that the internal air leakage occurs. Check the cylinder head gasket and
coolant pump.
●Remove the pressure meter, supplement the coolant and close the radiator cap.
4-7
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Troubleshooting
