What is the primary function of a radiator in an engine?

The primary function of a radiator in an engine is to cool the engine coolant that circulates through the engine. As the engine operates, it generates heat, and the coolant absorbs this heat to help maintain the engine at an optimal operating temperature. Once the coolant reaches the radiator, it is cooled by the air that passes through the radiator fins. This cooled coolant is then recirculated back into the engine to continue absorbing heat, ensuring efficient thermal management and preventing overheating.

The other functions listed, such as maintaining proper engine oil levels, filtering air entering the engine, or regulating fuel flow, are handled by different components in the engine system. The radiator is specifically designed to manage coolant temperatures, making it a critical component in preventing engine damage and ensuring smooth operation.