A radiator hose is a component of your vehicle’s engine cooling system. Typically made of rubber, a radiator hose carries engine coolant from the engine to the radiator or vice versa.
In order to ensure that your engine operates within a specific temperature range, and to keep it from overheating, a liquid coolant (also known as “antifreeze”) is circulated through the engine block. There, the coolant absorbs heat from the engine. The coolant exits the engine through the upper radiator hose and travels to the radiator.
Inside the radiator, the coolant flows through a network of tiny tubes snaking their way across a matrix of cooling fins. Air passing through the radiator pulls heat from the coolant and allows it to dissipate into the atmosphere. Once its temperature has dropped, the coolant returns to the engine through the lower radiator hose so it can pick up some more heat.
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