Within the engine cooling system, what is the main job of the radiator?

Question

DentroTest · Accepted Answer

The radiator is the component in charge of cooling the coolant that has absorbed the heat generated in the engine block and the cylinder head. When the engine reaches its optimum operating temperature, the thermostat opens and lets the hot fluid circulate through the fine ducts and fins of the radiator. There, in contact with the outside airflow (helped by the movement of the vehicle or by the action of the fan), the liquid gives up its heat to the atmosphere and returns at a lower temperature to keep cooling the engine. Preventing leaks and evaporation is not the radiator's job: the tightness of the circuit depends on the condition of the hoses, clamps, gaskets and the valve of the filler cap or expansion tank, not on the radiator itself. Raising the temperature is the opposite of its role: the radiator acts precisely to dissipate heat and prevent overheating; the initial rise in temperature depends on the internal combustion itself while the thermostat remains closed.

Within the engine cooling system, what is the main job of the radiator?

Want to pass the Permit D and D1 (English) theory test first time?