Can a car run without coolant?

[ORowan]

Coolant is an essential item for a car, and a car cannot run without coolant. The function of coolant is to dissipate heat from the engine. Without coolant, the engine and radiator lack protection, which affects the heat dissipation efficiency of the radiator. The engine temperature will continue to rise without effective cooling, and the antifreeze cannot circulate properly. Continuing to drive under such conditions may cause severe engine damage. In cold climates, it can also lead to the freezing of the engine or radiator, resulting in engine failure and rendering the vehicle unusable. The full name of coolant should be antifreeze coolant, meaning it has antifreeze properties to prevent the coolant from freezing during parking in cold seasons, which could crack the radiator or damage the engine cylinder block. Coolant is not only for winter use but should be used year-round. In regular car maintenance, the engine coolant should be replaced every year. Coolant consists of three parts: water, antifreeze, and additives. Based on the antifreeze component, it can be classified into alcohol-based, glycerol-based, ethylene glycol-based, and other types of coolant. It is important to note that the coolant reservoir usually has max (maximum) and min (minimum) level marks. If the coolant level is below the minimum mark, it indicates insufficient coolant, and it needs to be replenished promptly. The optimal amount of coolant should be between the max and min levels.