The main indications of a failing water pump in a diesel engine include several telltale signs. First, overheating. A failing water pump is unable to circulate coolant effectively, leading to engine overheating, especially under load. Second, coolant leaks. Leaks may be visible around the water pump housing or from the weep hole, indicating a failing seal. Third, noise. A failing water pump may produce unusual noises, such as whining, grinding, or squealing, indicating worn bearings. Fourth, l....
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