Durango 4WD V8-5.9L VIN Z (1998)
Water Pump: Testing and Inspection
Replace water pump assembly if it has any of the following conditions:
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The body is cracked or damaged
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Water leaks from shaft seal. This is evident by traces of coolant below vent hole
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Loose or rough turning bearing. Also inspect viscous fan drive
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Impeller rubs either the pump body or timing chain case/cover
