Cooling systems regulate engine temperature via heat transfer, preventing overheating and maintaining optimal operating efficiency. Components include radiators, water pumps, thermostats, and hoses, all circulating coolant throughout the engine block and cylinder head. Radiators dissipate heat through a core and fins, utilizing airflow generated by engine-driven or electric fans. Water pumps create coolant circulation, while thermostats regulate flow based on temperature. Modern systems increasingly incorporate electronically controlled cooling fans and variable displacement water pumps for enhanced thermal management and fuel economy.