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Engine Cooling System
If engine overheating occurs, there could be a fault in the
cooling system which may be on account of :
1. Less coolant in the cooling system or dirt/scale having
accumulated inside cooling water passages especially
in the radiator core.
2. Choking of radiator passages due to foreign material or
damages.
3. Defective thermostat.
4. Defective coolant temperature sensor.
5. Non operation of electrically operated fans (Controlled
by ECU).
6. Coolant leakage.
7. Radiator cap not sealing properly.
8. A.C. condenser fan not working
9. Excessive refrigerant charging in the A.C. system.
10. No communication between auxiliary tank and radiator.
Prevention of Rust Formation
To prevent rust formation in the radiator use premixed
recommended anti-freeze coolant. This is sufficient to
operate the vehicle upto -40
o
C.
The coolant filling Procedure:
It is recommended that the refilling of the engine coolant should
be carried out at authorized service centre
COOLING SYSTEM
M A I N T E N A N C E
1.Auxiliary Tank 2. Radiator Pressure Cap
1. Air evacuation and coolant filling (Vacuum filling) Method:
The coolant refilling in the system is recommended to be carried
out through air evacuation and coolant filling method for quick
filling.
1. Allow the engine to cool up to ambient temperature.
2. Keep cabin heater valve (if applicable) at “ON” position
throughout the coolant refilling.
3. The complete cooling system should be drained (old coolant)
before refilling the system.
a. Remove radiator pressure cap
and bleeding screw at EGR
cooler outlet (BSIV engine)
b. Drain the coolant from engine through by removing
