Many cooling systems today, including the newer Volvo units have a separate coolant reservoir or most commonly known as expansion tank. Also called the recovery tank, it is basically designed to act as additional reservoir for the radiator. Connected to the overflow tube of the radiator filler neck, the expansion tank is partly filled with water and antifreeze mixture better known as coolant. The coolant inside the engine expands, as it accumulates heat from the engine. Instead of escaping through the overflow tube and onto the ground just to be wasted, the expansion tank catches it. The coolant flows into the expansion tank for safe keeping and to ensure that the cooling system will have enough coolant for efficient heat dissipation. When the engine cools, a vacuum is created in the cooling system which drives the coolant back into the radiator from the expansion tank. That tells us that the coolant circulates in a closed system. Coolant can flow back and forth between the radiator and the expansion tank as it expands and contracts because of gaining temperature and being cooled down respectively. However, since this reservoir is typically made from plastic material, it is susceptible to damages and cause coolant to leak not through the overflow tube but directly through a hole or tear in it. And for this situation, only a replacement will be your best solution. When you need new parts for Volvo vehicle, our online store is the best place to go. Our line of quality parts and accessories is accessible with real ease. Just by simply providing some information about your vehicle, a complete list of components that are designed to work efficiently on your ride will be provided. Our Volvo expansion tank replacements are available for various Volvo models, so you'll surely get the right product for your unit. You may now browse our online store to start the search.