GM 12482000 Engine Coolant Pump Kit

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To get rid of a four-cylinder engine, starting by undoing the cable from the negative battery terminal and removing the coolant. Then, take off the water pump belt as well as lower radiator hose at pump support bracket. After that, remove bolts holding water pump and take it out of engine compartment. When fitting new water pump, clean its gasket surface on pump support bracket and apply RTV sealant around the mounting flange of a new water pump. Mount the water pump onto this housing and tighten down these bolts to specified torque. Attach lower radiator hose, install drivebelt for water pump and tension it accordingly. Finally, fill cooling system with fresh coolant while attaching negative terminal of battery then start engine observing for any leakage coming from coolant system. For V6 engine removals begin by taking off right side louvered cover over engine compartment disconnect negative battery cable. Remove plastic shield over battery and drain cooling system. And then unfasten r nut that secures wiring harness to junction block behind battery; remove EGR solenoid vacuum valve along with bracket as one assembly unit. Loosen right rear wheel lug nuts; lift rear of vehicle and remove right rear wheel. Loosen alternator adjusting bolts (two) and remove drivebelt. Carrying on further when you unscrew all eight M8 × 1.25×50 mm flange screws on top of cylinder head cover, you will see that there were also those two M10 ×1 .5×80 mm bored blind holes in your casting near each front corner where cylinder head cover was bolted in place on your cylinder block before; now they are plugged. The reason why it is possible to use TSB's for production vehicles is because they involve problems that areredesigns because they were produced incorrectly. Next the nuts and water pump bolts are removed. Lower vehicle and remove top of water pump. For changing worn water pump, clear mating surface on block and apply RTV to the new water pump mating surface. After that put it in position, raise vehicle and install them. Then tighten them to manufacturer's specifications. Rest of installation is opposite of removal procedure. Finally, start engine with fresh antifreeze mixture from drainage system; allow a normal operating temperature for engine before checking for coolant leaks.

They should be loosened and removed, along with the fan blades and pulley or pulleys from the hub on the water pump shaft.

If the water pump is suspect, it should be replaced with a new or factory-rebuilt unit.

Disconnect and remove all mounting brackets attached to the water pump.

The first way is to squeeze the upper radiator hose while the engine is running at normal operating temperature. If the water pump is working properly, a pressure surge will be felt as the hose is released.