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Description






The engine is cooled by coolant set in forced recirculation through jackets formed in the cylinder and cylinder head, and through the radiator. For the water pump, a high-capacity centrifugal pump is used. The radiator is a tube-and-fin type made of aluminum material, which is characterized by lightness in weight and good heat dissipation.

 

The thermostat is of wax pellet type, complete with a valve as the means of temperature-dependent control over the flow of coolant through the radiator. The valve is actuated by the temperature-sensitive wax contained in the pellet.

 

Referring to the following illustration, the thermostat is in the closed condition, so that coolant recirculates through the route comprising pump, engine, by-pass hole of the thermostat and radiator in the regulated condition.

 

As the coolant temperature rises to 76.5°C and the thermostat valve unseats, the normal coolant flow is established. At about 90°C of coolant temperature, the thermostat becomes completely open and most of heat is released to the atmosphere through the radiator core.

 

 

 
To coola nt reservoi r ta nk Rad iator cap

 

 

Ther mostat

 

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