When does the water pump need to be replaced? Understanding your engine's water pump is crucial for vehicle health! A failing water pump can lead to serious issues, as illustrated in the diagram. Here are the key signs of water pump Visual Inspections Increase Centrifugal Pump Life Pumps & Systems The image illustrates the differences between a properly functioning and a leaking water pump, emphasizing the condition of the seal and gasket. A good water pump has a clean, properly sealed gasket