Page 176 - Mechanic Diesel - TT

MECHANIC DIESEL - CITS

Disadvantages

Following are the main disadvantages of water cooling system
1 In this system it would be necessary to make the radiator very large. So that the water can cool down quickly.
2 If for some reason there is an obstruction in the waterway, then this system is not able to perform its function.
Types of water cooling systems

Water cooling system is of following types
i Thermo-siphon system
ii Pump circulation system
1 Thermo-siphon system
The thermo-siphon system is similar to the Forced circulation system and the radiator is filled with water. This
radiator is made almost like the radiator of Ford Circulation system, but in this system a pump is not used.
Generally, a thermo-siphon system is installed in front of the engine with a radiator. The cold water from the
radiator goes to the engine block through the reservoir prime below it. From here, the water gets heated through
the water jacket or water passage in the engine head and enters the heat tank of the radiator through a pipe from
the engine head.
The air coming in contact with the radiator fins reduces the temperature of the water and the cooled water from
the tubes installed in the radiator enters the lower tank of the radiator by gravity.
1 Water circulates self-due to density.
2 Top → bottom (in radiator)
3 Bottom → Top (in engine)

2 Pump circulation system

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CITS : Automotive - Mechanic Diesel - Lesson 47 - 56 CITS : Automotive - Mechanic Diesel - Lesson 47 - 56