2001-04 Mustang Radiator Overflow Tank

Coolant Overflow Tank
Repair the cooling system in your 2001-2004 Mustang with this direct replacement coolant overflow tank. After years of service and numerous heat cycles, the factory plastic coolant overflow tank(also known as an expansion tank) tends to weaken, become brittle, and crack, causing troublesome leaks under the hood. This coolant overflow tank is made of a durable plastic construction that matches the factory tank and has molded fill level markings to ensure topping off your coolant is a simple task. Bolting up to the existing factory mounting points on your radiator support, this overflow tank requires no modifications to install. This coolant overflow tank is the perfect choice for restoring the engine bay of your Mustang while eliminating irritating cooling system leaks.

What Does An Expansion/Overflow Tank Do?
An expansion tank connects to your lower radiator hose in order to catch extra coolant or air that is in the system once the engine has reached operating temperature. The coolant expansion tank is also known as a coolant overflow tank or engine coolant de-gas bottle. The expanding coolant pours over into the expansion tank and then siphons back into the cooling system when temperatures and pressures decrease. This helps keep the radiator full at all times and eliminates any air in the cooling system, allowing your radiator to be more effective.