Jeep 4694307AC Engine Cooling Water Pump

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Disconnect the cable from the negative battery terminal. Drain the cooling system. Remove the accessory drive belts. Remove the timing belt cover(s), the timing belt, camshaft sprockets, and the rear timing belt cover. Remove the bolts attaching the water pump to the engine block and remove the pump from the engine. If the water pump is stuck, gently tap it with a soft-faced hammer to break the seal. Clean the bolt threads and the threaded holes in the engine to remove the corrosion and sealant. Remove all traces of old gasket material from the sealing surfaces. Compare the new pump to the old one to make sure that they're identical. Install a new O-ring seal in the groove that lines the water pump body, then apply a thin film of RTV sealant to hold the seal in place during installation. Install the water pump bolts and tighten them. Don't overtighten the water pump bolts; doing so will damage the pump. The remainder of the installation is the reverse of removal. Refill and bleed the cooling system when you're done. Then run the engine and check for leaks.

Disconnect the battery and raise the vehicle. Drain the coolant and save if possible. Remove the engine splash shield and timing belt components for four-cylinder engines. Remove the water pump and clean the bolt threads and sealing surfaces. Install a new O-ring seal and apply RTV sealant. Install the pump and tighten the bolts to the specified torque. For V6 engines, loosen the pulley bolts and remove the drivebelt. Remove the pulley and pump together. Clean the bolt threads and remove the old seal. Install a new O-ring seal and RTV sealant. Position the pulley and pump and install the mounting bolts. Install the drivebelt and pulley bolts. Refill and bleed the cooling system and run the engine.

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.

Disconnect the battery and raise the vehicle. Drain the coolant and save if possible. Remove the engine splash shield and timing belt components for four-cylinder engines. Remove the water pump and clean the bolt threads and sealing surfaces. Install a new O-ring seal and apply RTV sealant. Install the pump and tighten the bolts to the specified torque. For V6 engines, loosen the pulley bolts and remove the drivebelt. Remove the pulley and pump together. Clean the bolt threads and remove the old seal. Install a new O-ring seal and RTV sealant. Position the pulley and pump and install the mounting bolts. Install the drivebelt and pulley bolts. Refill and bleed the cooling system and run the engine.

Start by disconnecting the negative battery cable and draining the cooling system.

If a failure occurs in the pump seal, coolant will leak from the front (right side) of the engine, leading to engine damage.

To perform a quick water pump performance check, ensure that the coolant level is full, start the vehicle and let it warm up fully, and turn on the heater in the passenger compartment. If there is little or no heat output, it may indicate a failing water pump as coolant flow does not appear to be going through the heater core.

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

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

Drain the cooling system and remove the cooling fan and shroud, remove the drivebelts and the pulley at the end of the water pump shaft, and for 3.6L engines, also remove the air filter housing and inlet housing.

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

Remove the air conditioning compressor mounting bolts and the accessory drivebelt bracket and timing belt. Remove the water pump bolts and detach it from the engine. Clean the bolt threads and threaded holes, and compare the new pump to the old one to ensure they're identical. Remove any old gasket material and clean the engine and new water pump mating surfaces. Apply ATV sealant to the new water pump O-ring for four-cylinder engines or to the gasket mating surface for 3.7L V6 engines. Attach the pump and O-ring/gasket to the engine and tighten the bolts in a criss-cross pattern. For 4.0L engines, install a new O-ring seal in the water pump groove and carefully mate the pump to the engine. Install the water pump mounting bolts and tighten them. Reinstall all parts that were removed for access to the pump, refill the cooling system, and check for leaks.