How often should the vehicle's antifreeze be replaced?
2 Answers
The vehicle's antifreeze should be replaced every two years. This is just a reference interval. For commercial vehicles with higher mileage, the replacement interval should be shorter. Since driving conditions vary for each vehicle, the replacement should be based on actual usage. Check the antifreeze condition regularly - if the level is low, replenish it promptly; if suspended particles, sediment, or discoloration/degradation are observed, replace the antifreeze immediately and flush the system. Antifreeze replacement procedure: Before a complete antifreeze replacement, conduct a thorough inspection for any leaks or cracks in the pipelines, with special attention to the five-way hose (named for its five connection points to different components). Antifreeze circulates through this hose before being distributed to various parts of the vehicle. If any antifreeze leakage is detected at this component, replace the hose or reseal the connections as needed. Drain the old antifreeze, then flush the channels with clean water. Add water to the antifreeze reservoir and continue filling until clean water circulates continuously through the engine cooling system. Start the engine and let it idle for 3-5 minutes to circulate the water. Initially, slightly pinkish water will flow out - continue flushing until completely clear water emerges. Remember to disconnect the heater hose and drain all water from the heater core. Approximately one hour after draining, pour new antifreeze into the radiator hose for rapid filling. Then add another container of antifreeze to the reservoir until nearly full. Run the engine for about 10 minutes - as air escapes from the cooling system, the fluid level will drop. Top up the antifreeze to the "MAXT" mark on the reservoir.
I've been driving for many years and believe that changing the coolant is crucial. It's generally recommended to replace it every two years or around 30,000 kilometers. Last time, I delayed it for nearly five years, and as a result, the engine froze in winter, costing me thousands in repairs. It's not just about antifreeze protection; coolant also prevents engine corrosion and reduces the risk of pipe bursts. Checking it yourself is simple: when the engine is cold, ensure the fluid level is between the marked lines, and if the color turns cloudy, it's time for a change. Don't neglect it during hot summer days either, as it helps dissipate heat and reduces engine strain. When replacing, it's best to choose a high-quality brand. It might cost a few dozen bucks, but it saves a lot of hassle in the long run. Remember, the manual is the most accurate reference, as different car models vary significantly.
