No, a radiator does not pull coolant from a reservoir.
The purpose of a coolant reservoir (also known as an overflow tank or expansion tank) is to provide a space for coolant to expand as it heats up and to collect excess coolant that is pushed out of the radiator as the engine cools down.
The radiator’s job is to circulate coolant through the engine to help regulate its temperature. As the engine heats up, the coolant absorbs heat and flows to the radiator, where it is cooled down by air passing over the radiator fins. The cooled coolant then flows back to the engine to absorb more heat.
So, while the radiator and coolant reservoir work together to regulate engine temperature, they serve different functions and do not directly interact with each other in terms of fluid transfer.
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