After 60,000 kilometers in Ming Rui, the water pump needs to be replaced. Centrifugal water pump is widely used in automobiles, and its basic structure includes water pump shell, connecting plate or pulley, water pump shaft, bearing or bearing sleeve, water pump impeller and water seal device. Water pump is an important part of automobile. The following are the symptoms of water pump damage: 1. The damage of water pump will weaken the cooling circulation ability, even stop the circulation, resulting in the phenomenon of "cooling liquid boiling". 2. There is leakage near the engine water pump. The performance of coolant leakage can leave traces of coolant color on the vent hole of the water pump, leading to symptoms such as excessive water temperature after insufficient coolant. 3. When the engine is working, the water pump makes abnormal noise. The abnormal sound of water pump may be caused by internal foreign objects or bearing wear. The function of automobile water pump is to pressurize the coolant and ensure the coolant to circulate in the cooling system. This will allow water to circulate in the radiator and engine cylinder to take away heat and ensure that the engine will not overheat.