What component of a radiator should be straight and free of debris?

The fins of a radiator play a crucial role in the cooling process of an engine. Their primary function is to dissipate heat from the coolant flowing through the radiator core, allowing the engine to maintain an optimal operating temperature. When the fins are straight and free of debris, they can maximize airflow and heat transfer efficiency. Any obstruction or bending of the fins can restrict airflow, leading to reduced cooling performance and potential overheating of the engine. Keeping the fins in good condition is essential for the overall functionality of the radiator, ensuring that it effectively cools the engine and prevents any performance issues.