1, the damage of the water pump will weaken the cooling circulation ability or even not circulate, and the coolant will boil.

2. Water leaks near the engine water pump. Coolant leakage will 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 sound. The abnormal sound of the water pump may be caused by foreign matter inside or bearing wear.