Discover a wide selection of replacement Expansion Tank at AM Car Parts. Our extensive range is sourced from top-tier auto parts manufacturers, ensuring quality and reliability. Simply input your vehicle's registration number or select the make and to find the compatible Expansion Tank for your vehicle.
What is Expansion Tank?
A coolant expansion tank is a common component found in most automotive applications. They are typically connected by a tube to the radiator filler neck, and can serve as a place for excess coolant to be captured when the pressure release valve in the radiator cap gives way. In a properly operating cooling system, the coolant will then be siphoned back into the radiator as the temperature drops. Certain applications can also use the coolant expansion tank as the fill point, in which case it serves as a pressurized part of the system. Many older cars and trucks lacked a coolant expansion tank, and any excess coolant would simply drain out onto the ground.