Will adding too much antifreeze have any impact?
2 Answers
Adding too much antifreeze can have negative effects, which include: during vehicle operation, thermal expansion may cause it to overflow through the pressure relief valve, leaving stains. The functions of automotive antifreeze are: to prevent the coolant from freezing during cold winter parking, which could crack the radiator or damage the engine cylinder block or head. The method for replacing antifreeze is: 1. Unscrew the radiator cap to drain the old antifreeze; 2. With the engine idling, inject clean water until clear water flows out from the radiator; 3. After all clean water has drained, close the water valve; 4. Add new antifreeze until the liquid level is between the MAX and MIN marks; 5. Replace the cap and let the engine idle for two to three minutes.
Adding too much antifreeze definitely has consequences. As an experienced driver who has been behind the wheel for years, I once accidentally overfilled the antifreeze, thinking a little extra would be safer. But while driving, the temperature gauge started acting erratically. When I stopped to check, I found antifreeze bubbling out of the expansion tank, making a mess everywhere. Later, a mechanic explained that overfilling can burst seals, leading to leaks and even pipe corrosion. Since then, I've learned my lesson—I always carefully check the fluid level between the MIN and MAX marks when topping up. The most accurate reading is taken when the engine is cold in winter; never do it when the engine is hot. If you do overfill, use a suction tube to carefully remove the excess to avoid potential issues. Also, remember to use the same antifreeze formula—mixing different brands can cause sediment buildup and worsen problems. Safety on the road comes first.
