Replace the antifreeze generally or every kilometer. Do not replace the antifreeze when the engine is at high temperature.
Precautions for filling coolant: after the coolant is drained, tighten the drain switches of the cylinder block and radiator. Fill the specified coolant from the radiator filler until the coolant level in the reservoir reaches the specified "full".
At this time, cover the radiator cap, let the engine run to normal operating temperature, stop the engine and turn off the engine until it is cooled to room temperature.
Then observe the liquid level height of the liquid tank and add as appropriate until there is no air in the liquid tank when the engine is idling.
Do not spill water on the engine when adding water. When adding water, if the water is sprinkled on the spark plug socket of the engine, the high-voltage line socket, and the distributor, it may have an impact on the ignition; Water splashing on the drive belt may also cause it to slip; Sprinkled on the engine body may also lead to deformation and even crack of the engine body.
Do not mix different types of antifreeze. Otherwise, it is easy to cause chemical reaction, generate precipitation or bubbles, and reduce the use effect. When replacing the coolant, clean the cooling system with clean water before adding new antifreeze and water. The name of the remaining antifreeze shall be marked on the container to avoid confusion.