2. Gently open the water tank cover (press the water tank cover with cloth before opening);
3. Unscrew the drain valve at the bottom of the water tank (drain the original coolant in the water tank); If the engine has a cylinder oil drain plug, it is necessary to remove the plug and drain the residual coolant in the cylinder;
4. When there is no coolant flowing out, tighten the drain valve and cylinder drain plug;
5. Open a new bottle of antifreeze;
6. Slowly inject new antifreeze into the water tank to the highest mark of the water tank;
7. Put the warm air control button in the heating position, start the engine until the radiator outlet pipe heats up, and then turn off the engine;
8. Check the liquid level of antifreeze (added when the liquid level does not reach the highest mark);
9. Tighten the water tank cover;
10. Cover the machine.
Extended data:
The full name of antifreeze should be antifreeze coolant, which means coolant with antifreeze function. Antifreeze can prevent the coolant from cracking the radiator and freezing the engine cylinder block or cover when parking in cold winter.
In addition to antifreeze, antifreeze has the following advantages:
Anti-corrosion function: the engine and its cooling system are made of metal, including copper, iron, aluminum, steel and solder. These metals will be corroded and rusted when exposed to water at high temperature for a long time. Antifreeze not only won't corrode the engine cooling system, but also has the functions of corrosion prevention and rust removal.
General use: used as cooling liquid in automobile, diesel locomotive, tractor, ship, engine, water tank and various mechanical equipment, diesel engine, gasoline engine and other cooling systems. It has many functions such as anti-freezing, anti-boiling, anti-corrosion and anti-fouling.
The boiling point of water is 100℃, and the boiling point of high-quality antifreeze coolant is usually above zero 1 10℃, so in summer, antifreeze coolant is more difficult to boil than water. Using water as coolant is the biggest headache for drivers. Scale adheres to the metal surface of water tank and water jacket, so the heat dissipation effect is getting worse and worse, and it is difficult to remove it.
High-quality antifreeze is made of distilled water and added with anti-scaling additives, which not only does not produce scale but also has the function of scale removal. Of course, if the scale of your water tank is thick, you'd better clean it thoroughly with water tank cleaner before adding antifreeze. Like water, it has the advantages of high specific heat, large latent heat of evaporation and convenient replenishment. When the ambient temperature is below zero, the water in the cooling system will turn into ice, and the components of the cooling system will be in danger of being damaged by expansion. At this time, the use of antifreeze can ensure the normal operation of the engine at low temperature.
Baidu encyclopedia: antifreeze