A coolant is a substance, typically liquid, that is used to reduce or regulate the temperature of a system. An ideal coolant has high thermal capacity, low viscosity, and low cost, is non-toxic and chemically inert, and neither causes nor promotes corrosion of the cooling system. When it comes to your vehicle’s cooling system, two terms are often used interchangeably: antifreeze and coolant. While they are very closely related, there are important distinctions between the two. Coolant regulates engine temperature, preventing overheating by absorbing excess heat during combustion. It contains corrosion inhibitors, extending engine lifespan. In cold climates, it acts as antifreeze, preventing engine liquid from freezing and causing damage. Not sure which color coolant you need? Use Prestone's antifreeze color chart to find the best antifreeze for your vehicle and driving conditions. The new coolant you are adding must be the same type and color as the existing antifreeze in your car’s cooling system. Failure to adhere to this rule could cause costly damage to your engine. For related background details, please refer to our report on bravo 3 outdrive parts diagram. For a gallon of coolant, you can expect to pay less than $25, regardless of the type you need. But if you fill your cooling system with the wrong type, it can be much costlier. Check out the different types of engine coolant, how to pick the right one, and how long coolant should last. Using a coolant that’s not specifically designed for your vehicle can cause corrosion, damage components, and potentially lead to engine failure. Check your owner’s manual for the right formula. What Does Engine Coolant Do and Why Is It Important For Your Vehicle ...

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