In a vehicle with a combustion engine, fuel is converted into heat energy, which means the vehicle can get very hot very quickly. The cooling system reduces internal engine temperatures and prevents possible overheating by dissipating and removing heat from the vehicle’s engine. Cooling systems use antifreeze to control the internal temperature of the vehicle. Engine coolants, like antifreeze, have to withstand low temperatures without freezing and high temperatures without boiling. The antifreeze in your cooling system is composed of ethylene glycol and water. This mixture improves the boiling and freezing points of antifreeze and makes it effective at controlling a vehicle's temperature. Aside from keeping your engine cool as it circulates throughout the cooling system, antifreeze also prevents corrosion and helps lubricate the engine to keep it in proper working order. If your cooling system experiences a leak, it’s crucial that you get it checked out sooner rather than later.