Can I directly add more coolant if it's low?

[BrielleLynn]

You cannot directly add more coolant if it's low. It is appropriate to add coolant when the level is below the standard mark, filling it up to the "MAXT" mark on the reservoir. Coolant is a special additive-containing liquid primarily used in liquid-cooled engine cooling systems. It offers excellent performance in preventing freezing in winter, boiling in summer, and protecting against scale and corrosion year-round. Method for replacing coolant: Before completely replacing the coolant, conduct a thorough inspection to check for any signs of leaks or cracks in the pipes, with special attention to the five-way hose. The five-way hose is named for its five connections to different parts of the engine. Coolant flows through this hose and is distributed to various parts of the car to perform its function. If there are any signs of coolant leakage in this area, replace the hose or reseal the connections as necessary. Drain the old coolant, then flush the channels with clean water. Add clean water to the coolant reservoir and continue filling until water flows continuously through the engine cooling system. Start the engine and let it idle for 3 to 5 minutes to circulate the water. The water initially draining from the reservoir may appear slightly pinkish. Continue adding clean water until the outflow is clear. Remember to remove the heater hose to drain all water from the heater system. After draining for about an hour, add the new coolant through the radiator hose to allow it to flow quickly into the radiator. Then, add another container of coolant to the reservoir until it is nearly full. Start the engine and let it run for about 10 minutes. During this time, the coolant level may drop as air is purged from the system. Finally, top up the coolant to the "MAXT" mark on the reservoir.