Liquids undergo expansion when they are heated; hence, the coolant running through the engine normally expands especially during the engine's combustion process. The cooling system component that facilitates this coolant expansion is none other than the expansion tank. This is also called the overflow canister or coolant reservoir. If it is damaged, a replacement Mazda Expansion tank should be acquired to maintain the performance of the engine. You should check the condition of your expansion tank regularly because without it, the coolant will flow out of the tube, down to the street. Vacuum is formed in the cooling system whenever the temperature of the engine is goes down. This means that the reduction of pressure will suck the coolant back into the system. The coolant is flowing in a closed system that's why no energy is lost as it expands and compresses. The expansion tank is also capable of removing the air bubbles produced in the cooling system. Such bubbles are formed during compression, when pressure becomes higher. The coolant can efficiently absorb heat if these bubbles are removed from the system. The automotive expansion tank is normally placed near the radiator and is linked to the overflow tube, replacing the radiator cap. Once leaks occur in your Mazda expansion tank, have it replaced with a new one to avoid affecting the efficiency of your engine. High-quality replacement Mazda Expansion tanks are designed according to the configurations of vehicles so be sure to get the right one that fits into the specifications of your Mazda's cooling and engine system. Have a quick product search here in our store through our reliable parts catalog. If ever you run into some search troubles, you can use our toll free lines for your queries and clarifications. Our on-call customer service agents are ready to assist you any time of the day for your shopping convenience.