The engine cooling system (water radiator) is responsible for transferring the excessive heat from the combustion chamber to the outside of the engine, allowing the engine to operate at a suitable temperature and preventing damage to engine components caused by overheating. In this process, the coolant is circulated through the hot cylinder walls by a water pump. If the coolant temperature rises, the thermostat opens the passage and the hot coolant flows through the inlet pipe into the radiator. As it moves through the radiator, it transfers its heat to the tubes, which in turn transfer the heat to the fins at the junction of the tubes and fins. The transferred heat is dissipated and cooled by forced air flow. The cooled coolant exits through the outlet pipe and continues its cycle. Radiators are made of aluminum and brass and are available in two types: fin-tube (in this type of radiator, the tubes are perpendicular to the fins and pass through them) and corrugated radiators (in this type of radiator, the tubes do not pass through the fins, but rather the fins and tubes are placed side by side). Crugated fin radiators are a newer technology that offers high production speed and efficiency. They are manufactured with HF or B type tubes using brazing technology, with HF tubes offering higher durability.