Coolant tanks, also known as expansion tanks or reservoirs, are indispensable in the automotive industry for managing engine coolant levels. Typically located near the radiator, these containers serve as a reservoir for excess coolant and provide a space for thermal expansion. As the engine heats up, coolant is pushed into the tank, preventing over-pressurization of the cooling system. When the engine cools, the coolant is drawn back into the system, maintaining a consistent level. Coolant tanks play a crucial role in preventing overheating, ensuring proper engine cooling, and safeguarding the overall functionality and longevity of the vehicle's cooling system.