Water Pump: Service and Repair

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Removal
1. Disconnect battery negative cable, then drain cooling system.
2. Remove accessory drive belts.
3. Remove water pump attaching bolts and remove pump.
4. Using tool J 25034, remove pulley.

Installation
1. Using tool J-25033, install pulley on pump.
2. With sealing surfaces cleaned, place a 1/8 inch bead of sealant, part number 1052289 or equivalent, on water pump sealing surface.
3. With sealing surfaces still wet, install pump and attaching bolts. Coat threaded area of bolts with part number 1052080 sealer or equivalent and torque bolts to 6 ft. lbs. on 1982-84 models or 20 ft. lbs. for 1985-88.
4. Install accessory drive belts and adjust to specifications.
5. Connect battery negative cable.

Fig. 26 Positioning tool J-29176 against timing cover boss. V6-173:

Fig. 27 Applying sealer to water pump mating surfaces. V6-173:

V6-173
1. Disconnect battery ground cable, then drain cooling system.
2. Disconnect heater hose at water pump, then remove drive belts and water pump pulley.
3. Using the existing tapped hole in the cylinder head, install tool No. J-29167 and torque mounting bolt to 10 ft. lbs., Fig. 26.
4. Remove water pump attaching bolts, then remove pump assembly from engine.
5. Clean mating surfaces of water pump and cylinder block, then apply a bead of sealant 1052375 or equivalent to water pump mating surface, Fig. 27. On some engines a gasket is used to seal mating surfaces. On these engines, replace gasket instead of using sealant mentioned above.
6. Apply sealant 1052080 or equivalent to pump attaching bolt threads, then install water pump assembly. Torque M6x1.0 bolts to 8 ft. lbs., M8x1.25 bolts to 16 ft. lbs. and M10x1.5 bolts to 25 ft. lbs.
7. Remove tool J-29176, then install water pump pulley and drive belts and connect heater hose to pump.
8. Fill cooling system and connect battery ground cable, then start engine and check for leaks.