Summer maintenance of motor vehicle cooling system

• Check whether there are any loose deformations at the hinge holes of the shutter blades and at the shaft holes of the connecting rods and the fixing bolts. Check whether the shutters are fully opened. Whether the blades and the radiator have a 90-degree angle, if not, adjust them. Check the connecting bolts of the fan blades and the belt pulley. If there is any looseness, tighten the bolts. Check whether the fan blades are broken or deformed. If any, repair or replace them in time. Check the tightness of the pump housing on the engine and check whether the pump housing is in place. Cracks and leaks should be repaired. Check the cooling fan belt tension. On the connecting belt between the fan and the engine pulley. About 4 kg of pressure is applied. If the belt is not pushed in at a distance of about 15 mm, use a mobile generator to adjust. Check the operation of the thermostat. After the cold vehicle starts, if the temperature of the cooling water rises slowly, open the radiator cap and check the water temperature. If the water in the water jacket of the cylinder block and the water in the radiator rise at the same time, it indicates that the thermostat does not work properly or fails. Clean the cylinder water jacket and the scale in the tank. Stir with 8% hydrochloric acid and water and add the water tank. The engine was started and the temperature was maintained at 70°C. After 40 minutes of operation, the object was discharged. Then close the water valve, add 8% caustic soda solution, start the engine, run for 40 minutes, then release all the washings. Rinse with water until the released water is clear. Finally, remove the water jacket baffle to clean the sediment and keep the cylinder water jacket and tank clean and free of dirt.