What happens when coolant is turned off in a car?
What happens when coolant is turned off in a car? Once the driver parks the vehicle and turns off the engine, the heat dissipates which causes the coolant to not be as hot anymore. The coolant will then contract instead of expand; resulting in the volume of the coolant decreasing. Where does the coolant come from in an overflow tank? The overflow tank is connected to an overflow tube that comes from the radiator. This tank provides extra storage space for coolant as it expands when the engine heats up. Without this extra overflow storage space, the coolant would expand...