Why Does Antifreeze Decrease in Winter?

[VanTessa]

Winter antifreeze decrease reasons: When the engine is running, it generates extremely high temperatures, which also raise the temperature of the antifreeze. Generally, when the temperature of a liquid increases, its volume expands. If this occurs in a confined space, the pressure will rise. The antifreeze cap has a pressure relief hole that opens to release some antifreeze, maintaining an appropriate pressure level before the hole closes again. At this point, the antifreeze level will have decreased. The full name of antifreeze should be antifreeze coolant, meaning it is a coolant with antifreeze properties. Antifreeze prevents the coolant from freezing and expanding in cold winter conditions, which could crack the radiator or damage the engine cylinder block or head. Many car owners believe that antifreeze is only used in winter, but in fact, antifreeze should be used year-round.