What should I pay attention to when replacing automobile antifreeze?

Engine antifreeze is also called coolant, and the process and steps of replacing antifreeze are basically the same. The steps for correctly replacing antifreeze are as follows: 1. Prepare tools and materials. Comprises iron tongs, an iron drum filled with antifreeze and antifreeze (4L). 2. Drain the original antifreeze. Be careful not to replace the engine when it is hot. You need to open the radiator cover first, release the pressure, open the water tank cover, and then drain the antifreeze. If the vehicle chassis has an engine guard, you need to remove the guard first, then turn on the drain switch under the radiator and unscrew it clockwise. 3. Add new antifreeze. You can put the vehicle down and fill antifreeze from the radiator cover until the antifreeze flows out of the radiator opening. Then open the exhaust bolt, empty the air bubbles, add antifreeze, cover the radiator, increase the engine speed to 2000 rpm, add liquid into the liquid storage tank until it approaches the MAX scale line, and finally let the engine cool naturally. 4. Pay attention to safety. Before lifting the vehicle, it is necessary to check whether the handbrake is tightened and hung on the P or N gear. Wear gloves at work to avoid skin contact with antifreeze. The recovered antifreeze should be treated as industrial wastewater. After replacing the antifreeze, clean the cooling system to avoid the failure of the new antifreeze caused by the mixture of old and new antifreeze. When replacing antifreeze, you need to follow the correct steps to ensure safety and avoid the normal operation of the engine due to excessive engine temperature. At the same time, attention should be paid to cleaning the cooling system after replacing the antifreeze to avoid the failure of the new antifreeze caused by the mixture of old and new antifreeze.