GM 89018166
Water Pump

Before handling 4.8l, 5.3l, and 6.0l Water Pump replacements you must drain the cooling system. Open the air intake duct clamps at both the Throttle Body and the maf/iat sensor before unpacking the radiator inlet hose from the outlet duct and removing the air intake outlet duct. When necessary detach the engine sight shield. Unclipped the vent inlet Radiator Hose then put the Water Pump hose clamp at the new position and extracted the hose. Quit the Fan Blade and disconnect the accessory Drive Belt. Take off the outlet hose through its clamp and afterward the surge tank outlet hose along its clamp and heater inlet hose with its clamp. Lift out the Water Pump by removing its bolts before replacing all gaskets with new ones. You must install new gaskets on the clean surfaces before fitting the Water Pump. Use 15 nm torque before tightening Water Pump bolts to 30 nm. Put back the heater inlet hose and its clamp onto the surge tank outlet hose and its clamp together with the outlet hose and its clamp. Put on the accessory Drive Belt and install the Fan Blade along with its inlet hose that has its installed clamp. You can reconnect the engine vent inlet hose to its place on the Radiator Hose fasteners before reinstalling the engine sight shield if needed. Position the arrow mark of the outlet air duct over the Throttle Body fastener before screwing it into place. Join the radiator inlet hose clip to the outlet duct last and use 62 inch lbs torque when tightening the clamps around the throat body and the maf sensor system.

Before beginning repair you must drain the cooling system of its fluid. Detach the air cleaner outlet duct clamps at both Throttle Body and maf sensor positions. Then take off the radiator inlet hose clip that secures the outlet duct and the air cleaner outlet duct. Detach either the sight shield or radiator vent hose from their nipples on the radiator clip. Unclip the inlet hose from its position at the Water Pump before you remove both the inlet hose and the Fan Blade with accessory Drive Belt. Before continuing position the surge tank outlet hose clamp then take off the surge tank outlet hose. Take out the heater inlet hose at this point as well and afterward extract the Water Pump bolts while disposing of the used gaskets. Before putting on the Water Pump place new gaskets and make sure gasket surfaces remain clean during installation. Start by screwing in the Water Pump bolts fourteen point two five and ten point two five newton meters then turn them to thirty newton meters. Install heater inlet and surge tank outlet hoses first with their secured clamps then connect outlet hose with its clamps and set the accessory Drive Belt and Fan Blade. Place the inlet hose back on the engine while securing its clamp. Connect the engine vent inlet hose to Radiator Hose clips and put on the engine sight shield if needed. Attach the air cleaner outlet duct over the Throttle Body by aligning the arrow panel with its attaching stud and connect the radiator inlet hose cut to the outlet duct. While tightening both clamps ensure the sensor and Throttle Body reach 7 n.m (62 lb in). Add coolant to finish the work.

You need to drain the cooling system and take off the electric cooling fan to start Water Pump replacement. Detach the inlet hose at its Water Pump connection while opening the hose clamp. Then let the accessory Drive Belt slide off. Remove the outlet hose through its two clamps by first repositioning one clamp then the other. Take off the outlet hose on the heater inlet along with its clamp when you slip off the outlet hose. Unscrew and remove all Water Pump bolts to take out the pump assembly including its gaskets. Then discard the old gaskets. Keep oil and foreign materials away from all gasket surfaces before assembling the Water Pump. Install the Water Pump using new gaskets and follow this sequence when tightening the bolts first apply 15 nm force then boost to 30 nm. First place the heater inlet hose clamp then hose and repeat the same with surge tank outlet hose and water outlet hose before reinstalling the accessory Drive Belt. Put on the accessory Drive Belt and inlet hose together with its clamp. Then add the electric cooling fan at the end. The process ends when you fill the cooling system.

Start Water Pump replacement by taking off the air inlet duct and draining fluid before disconnecting the inlet Radiator Hose. Start by uninstalling the upper Fan Shroud plus cooling fan with assembly and Drive Belt. Unplug the radiator outlet hose from both the coolant pump and surge tank along with the heater hose before you can take out the Water Pump. First put the Water Pump in place and then attach the surge tank hose followed by the heater hose. Fit the outlet Radiator Hose back to the coolant pump before placing the Drive Belt and cooling fan with clutch assembly plus the upper Fan Shroud. Attach the inlet Radiator Hose to the Water Pump before putting back the air inlet duct. Check if the cooling system holds liquid properly and search for any fluid leaks before continuing. Using seal tabs or similar products in the cooling system should be avoided because they affect coolant flow and increase the risk of engine overheating or breakdown.

You must drain the cooling system before replacing the Water Pump of 4.8l, 5.3l, and 6.0l engines. Unsnap the outlet air duct connections to the Throttle Body and maf sensor before removing the radiator hose retaining clip from the outlet air duct and the entire air duct. Take off the engine sight shield and the radiator vent inlet hose by disconnecting them from the radiator hose clips when required. Untwist the hose clamp attached to the Water Pump and detach the inlet hose followed by the Fan Blade and accessory Drive Belt. First position the outlet hose clamp at the Water Pump and remove the outlet hose. Then position the surge tank outlet hose clamp and discard the surge tank outlet hose. Unclamp and detach the heater inlet hose before you remove all Water Pump bolts and take out the assembly including its gaskets for disposal. Before installing the Water Pump place new gaskets on clean surface areas and put the pump in position. Fasten the Water Pump bolts at 15 nm (11 ft. Lbs.) before tightening them to 30 nm (22 ft. Lbs.) as the final torque. Place back the heater inlet hose with its clamp followed by the surge tank outlet hose with its clamp then outlet hose with its clamp and install the accessory Drive Belt and Fan Blade. Install the engine vent inlet hose over the radiator hose clips before connecting the inlet hose back to its clamp as required. Secure the air cleaner outlet duct in place by aligning its Throttle Body end arrow mark with the attachment stud before closing the radiator inlet hose clip. Tighten each duct clamp at the Throttle Body and sensor to 4 nm while filling the cooling system.

Start by evacuating the cooling system fluid before performing Water Pump replacement. First disconnect the clamps on the air cleaner outlet duct near the Throttle Body and maf/iat sensor before removing the outlet duct radiator inlet hose clip and air cleaner outlet duct. The engine sight shield and radiator vent inlet hose must be unclipped from their position on the radiator hose. Start by moving the inlet hose clamp away from the Water Pump before you detach both the inlet hose and the accessory Drive Belt with Fan Blade. Begin by repositioning the outlet hose clamp and proceed to remove the outlet hose followed by the surge tank outlet hose clamp and surge tank outlet hose from the Water Pump. Relocate the heater inlet hose clamp before taking out the heater inlet hose. First remove the Water Pump Pulley bolts and pulley from the assembly then pull out the Water Pump bolts along with the Water Pump and gaskets before discarding the gaskets. To install the Water Pump start by cleaning all gasket surfaces of oil and foreign materials before installing the pump with new gaskets. Install the Water Pump bolts, tightening them first to 15 nm (11 ft. Lbs.) initialize bolt torque to 15 nm (11 ft. Lbs.) before proceeding to 30 nm (22 ft. Lbs.). Begin by installing the Water Pump Pulley along with its bolts before moving on to install the heater inlet hose and its clamp followed by the surge tank outlet hose and its clamp and finally the outlet hose and its clamp. Place the accessory Drive Belt followed by the Fan Blade and install the inlet hose while securing its clamp. The engine vent inlet hose should be connected to radiator hose clips before installing the engine sight shield unless otherwise needed. Insert the Throttle Body end of the duct so its arrow aligns with the Throttle Body attachment stud before installing the air cleaner outlet duct. Finally, install the radiator inlet hose clip to the outlet duct, tighten the air cleaner outlet duct clamps at the Throttle Body and maf/iat sensor to 7 nm (62 inch lbs.)complete the cooling system procedure.

Clean and inspect the water pump, discarding and replacing the gasket as necessary.

Reposition the outlet hose clamp at the water pump and then remove the outlet hose.

The air cleaner assembly and the air cleaner outlet resonator duct.

Install the water pump and NEW gaskets.

Tighten them first to 15 N.m (11 lb ft) and then to a final torque of 30 N.m (22 lb ft).

First, drain the cooling system.

Begin by loosening the air cleaner outlet duct clamp at the mass airflow/intake air temperature sensor.

The radiator outlet hose from both the surge tank and the water pump, and the water pump inlet hose.

Fill the cooling system and inspect it for leaks.

First, drain the cooling system.

Inspect for excessive scratches or gouging on the gasket sealing surfaces, restrictions within the internal coolant passages, excessive side-to-side play in the pulley shaft, and any leakage at the water outlet housing or the rear cover gasket, as well as at the water pump vent hole.

Reposition the surge tank outlet hose clamp and remove the surge tank outlet hose, followed by repositioning the heater inlet hose clamp and removing the heater inlet hose.

Remove the drive belt, followed by the fan clutch.

Reinstall the air cleaner assembly.

Remove the water pump bolts and take out the water pump, discarding the water pump gaskets.

Reinstall the accessory drive belt tensioner and bolts, tightening them to 50 Nm (37 ft. lbs.).

Loosen the air cleaner outlet duct clamps at the throttle body and Mass Airflow/Intake Air Temperature (MAF/IAT) sensor, then remove the radiator inlet hose clip from the outlet duct and take out the air cleaner outlet duct.

Reposition the inlet hose clamp and remove the inlet hose, then reposition the outlet hose clamp and remove the outlet hose.

Secure the radiator inlet hose clip to the outlet duct, tighten the air cleaner outlet duct clamps at the throttle body and MAF/IAT sensor to 4 Nm (35 inch lbs.), and fill the cooling system.

Connect the electrical connector to the auxiliary water pump, install the heater outlet hose to the clip, and then install the rear heater inlet hose to the auxiliary water pump.

Install the water pump and NEW gaskets.