Why Should Coolant Be Replaced?

[DiWyatt]

During long-term use, coolant inevitably deteriorates, leading to reduced performance in functions such as antifreeze and cooling. Additionally, failure to replace the coolant can cause corrosion of the car's metal pipes and even lead to radiator corrosion and leaks. The method for replacing coolant is as follows: Before completely replacing the coolant, conduct a thorough inspection to check for any signs of leaks or cracks in the pipes, with particular attention to the five-way water pipe. Coolant flows through the five-way pipe and is then distributed to different parts of the car to perform its functions. If there are signs of coolant leakage in this section, replace the water pipe or reseal the connection as needed. Drain the old coolant, then flush the liquid channels with clean water. Add clean water to the coolant reservoir, then continuously inject water into the reservoir so that it flows through the engine cooling system. Start the engine and let it idle for 3 to 5 minutes to circulate the water. Initially, the water flowing out of the reservoir may have a faint pink tint. Continue adding clean water until the outflow is clear. Remember to remove the heater hose and drain the water from the heater core. Approximately one hour after draining, add the new coolant through the radiator hose. Then, add another container of coolant to the coolant reservoir until it is nearly full. Start the engine and let it run for about 10 minutes. During this time, the coolant level will drop slightly as air is purged from the cooling system. Add more coolant until the reservoir reaches the maximum mark "MAXT".

[RubyDella]

As an ordinary driver with over a decade of experience, I think changing the antifreeze is just as crucial as regular maintenance and shouldn't be overlooked. Last time, I delayed it for three or four years, and my engine almost froze and cracked in winter—fortunately, I caught it early. When antifreeze deteriorates, its freezing protection weakens, raising the freezing point, which is especially dangerous in northern regions. It can also corrode the cooling system and pipes, leading to leaks or rust. Additionally, the anti-corrosion additives lose effectiveness, reducing the engine's cooling efficiency, which might cause overheating or even engine seizure in summer. I've heard it's best to replace it every two to three years, matching seasonal changes, using high-quality antifreeze mixed with distilled water. This protects the engine, avoids costly overhauls, and ensures peace of mind and safety.

[VanCaleb]

Hey, I've been into car modifications for years, so I pay special attention to coolant. It's the lifeblood of the cooling system. If not replaced, it can deteriorate into acidity, corroding aluminum radiators or water pump bearings, severely affecting engine performance. I've seen fellow enthusiasts' cars overheat and stall due to clogged radiator fins from old coolant. Replacing it keeps the fluid fresh, enhancing boil-over and freeze protection, preventing radiator damage in winter. It's recommended to change every two years or 50,000 kilometers, using pre-mixed coolant to avoid issues. For car enthusiasts, regular maintenance ensures smoother engine operation, better fuel efficiency, and extends component lifespan.

[VonLiam]

As an experienced driver, I can tell you that coolant must be replaced promptly, or you'll regret it. Once in my younger days, a moment of neglect led to the coolant corroding the radiator joint, and winter freezing caused leaks, costing thousands to repair. Coolant degrades over time, losing its antifreeze and anticorrosion additives. When the freezing point rises, it can easily damage the cooling system pipes. Generally, it's best to replace it every three years, depending on the climate and driving habits. After a fresh change, the engine temperature becomes more stable, avoiding overheating and bursting issues. It saves money and hassle while extending the overall lifespan of the car.

[StJoseph]

When I first started driving, I thought coolant lasted a lifetime until a technician told me it expires, which really surprised me. Aged coolant has poor anti-corrosion properties, and accumulated sediment can clog the radiator, leading to insufficient cooling and engine overheating. The antifreeze effect of additives weakens, raising the freezing point, which can cause pipes to crack in winter. Replacing it restores boil-over and rust protection, preventing metal corrosion and water pump wear. It's recommended to check every two years and replace the mixture if necessary to maintain cooling system efficiency. After learning this, I now handle it regularly, feeling much more at ease.