GM 19210509 Engine Coolant Pump Kit

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A failure in the water pump can lead to engine damage and if it is found to be defective, it should be replaced with a new or rebuilt unit. In the event of a water pump seal failure, coolant will leak out at the left front of the engine, between the cylinder head and the coolant crossover housing. It is important not to mistake drive belt slippage, which causes a squealing sound, for water pump bearing failure. A quick check of water pump performance can be done by putting the heater on, as a corroded impeller in the pump may prevent efficient circulation of hot coolant.

To start removing the water pump, disconnect the battery's negative terminal cable. Now drain coolant fluid and remove the water pump drive belt, which is situated behind the coolant crossover assembly. To access it you are supposed to remove the drivebelt shield. After that, if equipped, get rid of the air filter housing and secondary AIR check valve bracket from the coolant crossover housing. Separate the lower radiator hose from thermostat housing and take off water pump bypass hose from coolant crossover assembly. Now remove water pump cover by using a clockwise rotating tool called a water pump removal tool before taking it out of its house. Clean mating surfaces of coolant crossover housing and cover to remove any residue left on them. For a new water pump installation, put another o-ring in a groove of a coolant-pipe housing first. Then after placing slotted tangs with the housing install new water pump as well as aligning them into place. In order to lock it, use special tool which should be turned counterclockwise for specified torque at least or more than once when needed. Put another o-ring in a groove of water pump cover and bolt up to specified torque values being mentioned in this case later on bring your engine parts back together down mechanically making sure all fasteners are tight enough before you finally have to refill cooling system start up motor look around see if anything leaks out.