When Should the Car Engine Coolant Be Replaced?

[Quinn]

Car engine coolant should be replaced every two years. Modern cars are equipped with water-cooled engines, which rely on coolant for heat dissipation. These engines have a radiator, and the coolant continuously circulates through the engine's water passages to remove excess heat. If the coolant is not replaced for a long time, its cooling performance will degrade, and its freezing point will also become insufficient. The full name of coolant should be antifreeze coolant, meaning it has antifreeze properties. Antifreeze prevents the coolant from freezing during cold seasons when the car is parked, which could otherwise cause the radiator to crack or the engine block to freeze. Antifreeze is not just for winter use; it should be used year-round. In standard car maintenance, the engine antifreeze should be replaced every year.