Overflow from the radiator travels through a hose into the radiator overflow tank, or coolant tank. Due to the design of the radiator pressure cap functioning in partnership with the overflow tank, the engine cooling system stays a closed cooling system, allowing no air to enter it, making the cooling system a lot more dependable and effective. The accumulated overflow of coolant from the radiator will eventually cool off. When this takes place, the coolant is returned to the water pump and rejoins the cycle by a vacuum generated by the reduction of temperatures within the cooling system. With the radiator and coolant tank being one solution of removing the heat from the coolant, there is another course that the coolant can take, which is through the heater core.
Napa Service Assistant
You don’t have to be an expert to know that preventive maintenance is the best way to make sure your vehicle is running properly. Use our interactive vehicle tool to learn about the maintenance and services your NAPA AutoCare Center can provide.