Mopar 4781157AB Water Pump Replaces

To check for a leak, remove the lower engine splash shield and use a flashlight to look for traces of coolant residue or dried coolant tracks around the weep hole(s).

To replace the water pump on a vehicle with a four-cylinder engine, follow these steps, disconnect the cable from the negative battery terminal.Set the parking brake and raise the front of the vehicle securely on jackstands.Drain the cooling system. If the coolant is in good condition, you can save and reuse it.Remove the engine splash shield.Proceed to remove the timing belt, timing belt idler pulley, camshaft sprockets, and rear timing belt cover.Remove the bolts attaching the water pump to the engine block and remove the pump.Clean the bolt threads and threaded holes in the engine to remove corrosion and sealant.Remove all traces of the old seal from the sealing surfaces.Compare the new water pump to the old one to ensure they are identical.Install a new O-ring seal in the groove on the water pump body and apply a thin film of RTV sealant to hold the seal in place during installation.Carefully mate 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. 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.

A failure in the water pump can cause serious engine damage due to overheating.