Steps for replacing water pump

What engine?WATERÂ PUMP

Removal

1. Drain engine coolant. See COOLANT CHECK & REPLACEMENT under SERVICING.
2. Disconnect No. 3 water by pass hose. See Fig. 19Â.
3. Disconnect radiator inlet hose. See Fig. 20Â.
4. Stretch the belts and loosen the water pump pulley mounting nuts. See Fig. 12Â.
5. Loosen the lock,  pivot and adjusting bolts of the generator,  and remove the drive belts. See Fig. 10Â.
6. Disconnect the oil cooler hose from the clamp on the fan shroud. See Fig. 11Â.
7. Remove the 2 bolts holding the fan shroud to the radiator. Remove the 4 water pump pulley mounting bolts. See Fig. 12Â.
8. Pull out the fan with fluid coupling,  water pump pulley and fan shroud. Remove the fan from the fluid coupling.
9. Remove the 4 bolts,  2 nuts,  water pump and gasket.

Fig. 19: Removing & Installing No. 3 Water By Pass Hose & Radiator Inlet Hose
Courtesy of TOYOTA MOTOR SALES,  U.S.A,  INC.

Fig. 20: Exploded View Of Water Pump Components
Courtesy of TOYOTA MOTOR SALES,  U.S.A,  INC.

Inspect

1. Visually check the water pump air hole and water hole for coolant leakage. If leakage is found,  replace the water pump.
2. Turn the pulley seat and check that the water pump bearing moves smoothly and quietly. If necessary,  replace the water pump. See Fig. 21Â.
3. Inspect fluid coupling for damage and silicone leakage. If necessary,  replace the fluid coupling. See Fig. 22Â.

Removal

1. Drain engine coolant.
2. Disconnect No. 3 water by-pass hose. See Fig. 19.
3. Disconnect radiator inlet hose. See Fig. 20.
4. Stretch the belts and loosen the water pump pulley mounting nuts. See Fig. 12.
5. Loosen the lock, pivot and adjusting bolts of the generator, and remove the drive belts. See Fig. 10.
6. Disconnect the oil cooler hose from the clamp on the fan shroud. See Fig. 11.
7. Remove the 2 bolts holding the fan shroud to the radiator. Remove the 4 water pump pulley mounting bolts. See Fig. 12.
8. Pull out the fan with fluid coupling, water pump pulley and fan shroud. Remove the fan from the fluid coupling.
9. Remove the 4 bolts, 2 nuts, water pump and gasket.

Installation

1. Install a new gasket and the water pump with the 4 bolts and 2 nuts. See Fig. 23. Tighten nuts and bolts to specification.
2. Install fan to the fluid coupling. Place the fan with the fluid coupling, water pump pulley, and fan shroud in position. Temporarily install the fan pulley mounting nuts. See Fig. 12.
3. Install the fan shroud with the 2 bolts, and tighten bolts to specification.
4. Connect the oil cooler hose to the clamp on the fan shroud. Install the drive belts with the adjusting bolt, lock bolt and pivot bolt. Stretch the belts tight and tighten the 4 water pump pulley mounting nuts.
5. Adjust the drive belts.
6. Connect No. 3 water by-pass hose. See Fig. 19.
7. Connect radiator inlet hose.
8. Fill radiator with engine coolant.
9. Start engine and check for leaks.