What are the symptoms of a bad engine water pump?

[AaliyahLynn]

Engine water pump failure mainly manifests in the following symptoms: 1. Cooling system malfunction. This can cause issues such as insufficient heat from the heater, unstable engine water temperature, or reduced coolant leading to poor engine circulation and overheating. 2. Noise from the engine area. A friction sound is produced as the engine rotates, with the volume changing as engine speed increases. Typically, the more severe the fault, the more pronounced this noise becomes. 3. Unstable idle. Increased resistance in the water pump's rotation directly affects the engine's operation. Specific manifestations include fluctuations in engine speed after starting, and in winter, it may even cause the engine to stall.