How Often Should Coolant Be Added?
2 Answers
For regular cars, coolant should be replaced and refilled every 2 years or 40,000 kilometers. For commercial vehicles, the frequency of coolant refilling is more frequent. Below are detailed instructions on coolant addition: 1. During car maintenance, pay attention to the coolant level. Once the coolant level drops below the minimum mark, it should be replenished promptly. Note that coolant has an expiration period, typically around 2 years, while high-quality coolant can last up to 5 years. Using expired coolant can cause rust in the engine's water passages, leading to blockages, engine overheating, or even "boiling over." 2. When adding coolant, keep the following in mind: First, identify the coolant filler port, which is marked with a thermometer-like triangular symbol on the cap. Second, do not mix coolants of different brands or colors, as their varying compositions and formulas can cause chemical reactions that impair performance. Third, choose a high-quality product of the same brand and model as the original coolant. Fourth, coolant is corrosive, so avoid contact with skin and rubber parts. If spilled, rinse immediately with water. Fifth, always add coolant after the engine is turned off and cooled to prevent the pressurized hot coolant from spraying out and causing burns.
The frequency of adding antifreeze isn't fixed—it depends on the situation. When I first started driving, I thought changing it once a year was enough, but I later noticed the level gradually drops due to evaporation or minor leaks. Now I've made it a habit to check the coolant reservoir every quarter—when the engine is cold, I open it to see if the level is between MIN and MAX, and top it up with the same type of antifreeze if it's low. Manufacturers generally recommend replacing the entire system every two years, but if you drive long distances frequently or have an older car that leaks faster, you might need to check and top it up every two months. Once, I forgot to check, and the temperature gauge spiked—only then did I realize that cooling system failure could lead to costly engine repairs. In short, don't wait for a fixed schedule; proactive monitoring is the safest way to save trouble and stay worry-free.
