What Is Engine Coolant?

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How Does an Engine Cooling System Work?....5

About engine coolant, or antifreeze, and why it's important. Learn what engine coolant or antifreeze is in this free auto repair and car care instructional video.

Part of the Video Series: How to Check & Refill Engine Coolant
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Video Transcript

Hi! This is Jon on behalf of Expert Village. In this video clip, I will be answering the question what is engine coolant. In an engine, the temperature can get to a very hot temperature, and there is fluid that travels through many of the holes in the engine and this will help dissipate the heat. The fluid is called antifreeze, also known as engine coolant. The reason we use coolant is because, although water will do about the same thing, water freezes when it gets too cold and it boils when it gets too hot. By mixing antifreeze with the water, it will lower the freezing point and will raise the boiling point of the liquid. Because the engine does get really hot, we add the antifreeze mixture so that it will help protect the engine better and have a less likelihood of boiling inside the engine.


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