Coolant, also known as antifreeze, is designed to help displace heat from the engine of your vehicle. By moving this heat away from the engine, your coolant helps to lower and stabilize the temperature of your engine block. Circulating the proper amounts of coolant and water protects your engine from overheating and is vital to its longevity. Overheating is one of the most common causes of engine failure. It is important to note that the composition of coolant breaks down over time as a result of the consistent heat to which it is exposed. If coolant is replaced as recommended by the manufacturer of your vehicle, it is likely to increase the life of your engine and lower costs associated with engine failure caused by overheating.