Mopar R4621172 Water Pump

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Yes, it's important to reinstall the pulleys and drive belts and check for proper tension.

Water pumps are equipped with weep or vent holes.

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

Mistaking drive belt slippage for water pump failure is important to avoid unnecessary replacement. Drive belt slippage can also cause a squealing sound, but it doesn't indicate a problem with the water pump itself.

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.