What is the function of coolant in a truck’s radiator?

The function of coolant in a truck's radiator is primarily to remove heat from the engine. The coolant circulates through the engine, absorbing heat generated during combustion and the operation of moving parts. This heat is then transferred to the radiator, where it dissipates into the air. Maintaining the engine at an optimal temperature is crucial for efficient performance, preventing overheating, and avoiding potential engine damage.

While lubrication and cleaning are important aspects of engine maintenance, these functions are not roles played by the coolant. Lubrication is typically handled by engine oil, which reduces friction between moving parts, while cleaning the fuel system involves other specific fluids and processes. Enhancing traction relates to the vehicle's tires and suspension system, which is separate from the cooling system's function. Thus, the primary role of coolant is effectively managing the engine's heat to ensure proper operation.