Buick 12630084 Water Pump Assembly

You can Select Your Vehicle to check if 12630084 fits your vehicle.

A failure in the water pump can lead to serious engine damage as it causes overheating. These models have a water pump that is driven by the drivebelt. Water pumps are typically equipped with weep or vent holes, which can leak coolant if there is a failure in the pump seal. To check for leaks, a flashlight and small mirror can be used to locate the hole on the water pump. If the water pump shaft bearings fail, there may be a howling sound while the pump is running, and shaft wear can be felt by rocking the water pump pulley up and down with the drivebelt removed. It is important not to mistake drivebelt slippage, which causes a squealing sound, for water pump bearing failure. Even if a pump shows no outward signs of a problem, such as noise or leakage, it may still need to be replaced. The only sure way to determine this is through removal for close examination. A quick check of water pump performance is to turn on the heater. If the pump is failing, it may not be able to efficiently circulate hot water to the heater core as it should.

To remove the water pump, start by disconnecting the cable from the negative battery terminal. Then, remove the air intake duct and air filter housing. Loosen the lug nuts on the right front wheel, raise the vehicle, and support it securely on jackstands. Remove the wheel and drain the cooling system. If the vehicle has an automatic transaxle, remove the exhaust manifold. Remove the plug from the bottom of the water pump housing to drain the coolant. Next, remove the thermostat housing and its transfer pipe, along with the hoses connected to them. If equipped, remove the coolant heater and its mounting bolt. Depending on the model and engine, you may need to remove the exhaust heat shield, PCV system vent tube and hose, or catalytic converter. Disconnect any electrical connectors or harnesses that interfere with access. Unbolt the bracket for the underhood fuse/relay box if necessary. Remove the three bolts securing the thermostat housing to the engine, then separate the housing and transfer pipe from the water pump. Remove the right inner fender splash shield and unbolt the cover over the water pump sprocket from the engine front cover. Install a special holding tool onto the water pump sprocket to prevent movement. Remove the remaining water pump sprocket bolts and the bolts attaching the water pump to the engine block. Gently tap the water pump with a soft-faced hammer if it is stuck. Clean the bolt threads, threaded holes, and sealing surfaces, removing any corrosion or old gasket material. Finally, remove the sealing ring from the water pump. To install the new water pump, insert a new sealing ring into the pump and align the water pump sprocket with the water pump using a guide pin. Install the water pump mounting bolts and sprocket bolts, tightening them to the proper torque specifications. Install the water pump access cover, thermostat housing, and water pipe, tightening the bolts to the correct torque specifications. The remaining installation steps are the reverse of the removal process. Remember to refill the cooling system and reconnect the battery. Finally, operate the engine to check for any leaks.

The first step is to disconnect the cable from the negative battery terminal.

Remove the water pump housing bolts and clean the old gasket seal from the engine surface and water pump housing. Use a new gasket during installation, finger-tighten the mounting bolts, and then tighten them to the specified torque.

For the removal of the water pump on 4-Cylinder engines, first, disconnect the cable from the negative battery terminal and drain the cooling system. Remove the drive belt, air intake duct, air filter housing, and the exhaust manifold heat shield. Drain excess coolant from the water pump housing and remove the lower radiator hose. On 2004 models, remove the thermostat housing pipe bolt from the front of the engine block and disconnect the ECT harness connector. Detach the heater hoses and remove the thermostat housing mounting bolts, then separate the thermostat housing from the engine block and water pump. Remove the water pump access cover from the engine front cover. Loosen the right front wheel lug nuts, raise the vehicle, and support it securely on jackstands. Remove the right front wheel and fender splash shield. Install a special holding tool onto the water pump sprocket to prevent movement and remove the water pump pulley bolts and the bolts attaching the water pump to the engine block. Clean the bolt threads and threaded holes in the engine and remove any corrosion or sealant, as well as old gasket material. For installation, install a new sealing ring into the groove in the pump and use a guide pin to align the water pump sprocket with the water pump during installation. Tighten the water pump mounting bolts and sprocket bolts to the specified torque. Install the water pump access cover and the thermostat housing and water pipe, lubricating the seal with silicone gel before installation. Complete the remaining installation steps and refill the cooling system, checking for leaks after operating the engine.For V6 engines, remove the engine timing belt cover and inspect the timing belt's condition. Remove the water pump mounting bolts and clean all gasket and o-ring surfaces on the pump and housing. Compare the new pump to the old one to ensure they are identical. Apply RTV sealant to hold the new gasket during installation and mate the pump to the block. Install the water pump bolts and tighten them to the specified torque. Complete the remaining installation steps, refill the cooling system, and check for leaks when operating the engine.For V6 heater core pump removal, disconnect the negative battery cable, drain the cooling system, detach the heater hoses and electrical connector from the heater core pump. Remove the bolt and bracket and take out the heater core pump from the engine compartment. Installation is the reverse of removal, including refilling the cooling system and checking for leaks when the engine is running.For V6 auxiliary water pump removal, disconnect the negative battery cable, drain the cooling system, remove the puller fan and shroud from the radiator, detach the hoses and electrical connector from the auxiliary pump. Remove the mounting clip and lift the pump from the engine compartment. Installation is the reverse of removal, including refilling the cooling system and checking for leaks when the engine is running.

Install a new sealing ring and the water pump, aligning it with the water pump sprocket. Tighten the water pump mounting bolts and sprocket bolts.

The signs of water pump shaft bearing failure include a howling sound while the pump is running and shaft wear that can be felt by rocking the water pump pulley up and down with the drivebelt or timing belt removed.

The final step is to refill the cooling system with the correct antifreeze concentration. Then, start the engine and check for leaks.

A failure in the water pump can lead to serious engine damage as it causes overheating.

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

A quick check to assess water pump performance is to turn on the heater. If the pump is failing, it may not be able to efficiently circulate hot water all the way to the heater core as it should.

A failure in the water pump can lead to serious engine damage due to overheating. If the pump seal fails, coolant will leak either from the engine front cover in four-cylinder models or from the engine timing belt cover in V6 models. Water pumps are equipped with weep or vent holes, which can be checked using a flashlight. If the pump seal fails, coolant will leak from the weep hole. It is important to use a flashlight to locate the vent hole on the water pump and check for any leaks. In case of water pump shaft bearing failure, a howling sound may be heard near the water pump while it is running. When the engine is off, shaft wear can be felt by rocking the water pump pulley up-and-down. However, it is crucial not to mistake drivebelt slippage, which causes a squealing sound, for water pump bearing failure. A quick check to assess water pump performance is to turn on the heater. If the pump is failing, it may not be able to efficiently circulate hot water all the way to the heater core as it should.

To remove a 4-cylinder engine, start by disconnecting the negative battery terminal and draining the cooling system. Remove the air intake duct and air filter housing, then loosen the bolts of the right front wheel and raise the vehicle on jack stands. Remove the wheel and the right front inner wheel splash shield. Take off the front exhaust manifold heat shield and the water pump access plate from the front cover. Disconnect the electrical connector from the engine coolant temperature sensor and remove the bolts from the thermostat housing and its pipes. Twist the coolant pipe out of the water pump and move the assembly to the left. Remove the coolant pipe and its seals. Install a special holding tool on the water pump and remove the remaining water pump sprocket bolts. Take out the two bolts from the front and rear of the water pump and gently tap it with a soft face hammer if it's stuck. Clean the bolt threads, threaded holes, and sealing surfaces, and remove the sealing ring from the water pump if reusing it. To install the new water pump, put a new sealing ring onto the groove of the pump and use a guide pin to align the water pump sprocket with the water pump. Install the water pump mounting bolts and tighten them, then remove the sprocket holding tool and guide pin. Tighten the water pump mounting bolts and sprocket bolts to the specified torque. The rest of the installation is the reverse of removal, making sure to lightly lubricate the new water pipe seals. For a V6 model, remove the timing belt cover and inspect the belt. On 2004 and later models, remove the timing belt, tensioner, and adjuster assembly. Clean all sealing surfaces of the pump and housing. To install the new pump, compare it to the old one to ensure they are identical. Apply a thin layer of RTV to hold the new gasket in place and mate the pump to the block. Install the pump bolts and tighten them to the specified torque. Finally, refill the cooling system, run the engine, and check for any leaks.

includes bolt, sprocket, gasket, plug, pump, seal, cover, stud