Jeep 5184498AE Water Pump

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Remove the idler pulley and, on later models, the tensioner.

Remove the timing belt and water pump mounting bolts. Inspect the water pump for damage and replace if needed. Scrape off old gasket material and install a new O-ring on the coolant inlet pipe. Place the new gasket on the water pump and install it, then press the pump assembly until the coolant inlet pipe seats properly. Install the pump-to-mounting bolts and refill the cooling system.

There are two ways to check the operation of the water pump while it's installed on the engine. If the pump is defective, it should be replaced with a new or rebuilt unit. Water pumps are equipped with weep or vent holes. If a failure occurs in the pump seal, coolant will leak from the hole. In most cases, you'll need a flashlight to find the hole on the water pump from underneath to check for leaks. If the water pump shaft bearings fail, there may be a howling sound at the front of the engine while it's running. With the engine off, shaft wear can be felt if the water pump pulley is rocked up-and-down.