How Often Should Coolant Be Added to a Car?
2 Answers
Antifreeze should be replaced every three years or when the car reaches 50,000 kilometers. Below are the replacement cycle and functions of antifreeze: Antifreeze replacement cycle: During car operation, coolant is also consumed. Generally, the replacement cycle for antifreeze is every three years or 50,000 kilometers. Beyond this period, the performance of the antifreeze will degrade, and it will no longer provide normal protection for the engine. Therefore, car owners should regularly check the coolant level. If the coolant level is below the minimum mark, it should be topped up. Functions of antifreeze: The primary function of antifreeze is to prevent the coolant from freezing in cold winter conditions, which could cause the radiator to crack or damage the engine cylinder block or head. In high summer temperatures, it effectively prevents boiling and avoids overheating. Antifreeze also has anti-corrosion properties.
As a veteran driver with twenty years of experience, I believe coolant maintenance depends on the specific situation. New cars generally don't require attention for two to three years, but for older vehicles or those frequently driven long distances, it's advisable to check the coolant reservoir level under the hood monthly. The safest method is to observe the reservoir's scale lines when the engine is cold, keeping the fluid level slightly above the midpoint between MIN and MAX. If the level drops below MIN, don't rush to top it up—first check for leaks in the system. I've personally seen cases where people kept adding coolant to a cracked radiator, only to overheat midway. Remember, never mix different colored coolants as they can coagulate and clog the system. During maintenance, ask the mechanic to test the freezing point and pH level—if degraded, the entire coolant needs replacement.
