Mopar 4781157AB Water Pump Replaces

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A failure in the water pump can lead to engine damage so be sure to check for a leak, remove the lower engine splash shield, and use a flashlight to look for traces of coolant residue. If the water pump shaft bearings do not work, there may be a howling sound near the water pump. If there is no heat output, it may indicate a failing water pump.

To replace the water pump on a vehicle with a V6 engine, follow these steps:Loosen the water pump pulley bolts.Remove the drivebelt.Remove the pulley bolts and position the pulley to access the water pump mounting bolts.Remove the water pump and pulley together by rotating and moving the pulley inward between the pump housing and the hub.Clean the bolt threads and threaded holes in the timing case cover to remove corrosion and sealant.Remove the old seal and clean the mating surfaces.Install a new O-ring seal in the groove on the water pump body and use RTV sealant to hold it in place during installation.Position the water pump pulley loosely between the pump housing and drive hub.Install the water pump mounting bolts and tighten them to the specified torque. Avoid over-tightening.Position the pulley onto the drive hub and install the mounting bolts finger-tight.Install the drivebelt and tighten the pulley bolts to the specified torque. Avoid over-tightening. Position the pulley onto the drive hub and install the mounting bolts finger-tight. Install the drivebelt and tighten the pulley bolts to the specified torque. The remaining steps of installation involve reversing the removal process. Refill and bleed the cooling system after completing the installation. Run the engine and check for leaks and proper operation.