The radiator and the water tank are jointly used as the heat dissipation device of the car, in terms of its material, the metal is not corrosion resistant, so it should be avoided from contact with corrosive solutions such as acid and alkali to avoid damage. For the car radiator, blockage is a very common failure, reduce the occurrence of blockage, which should be injected with soft water, hard water needs to be softened and then injected, so as not to produce scale caused by the blockage of the car radiator. The winter weather is cold, the radiator is easy to freeze and expand and freeze, so antifreeze should be added to avoid the freezing of water. In daily use, the water level should be checked at any time, and water should be added after stopping and cooling. When adding water to the car radiator, the water tank cover should be slowly opened, and the body of the owner and other operators should be as far away from the water inlet as possible, so as not to cause burns caused by high pressure and high temperature oil and gas ejecting the water outlet