Toyota 16100-69398-83
Water Pump

Begin water pump servicing by removing the timing belt along with the water inlet and the thermostat before disconnecting the No.2 oil cooler hose from the water pump and extracting the component itself. The inspection of the water pump for coolant leakage at both the water and air holes should lead to water pump replacement. Additionally, if coolant reaches the timing belt it requires a new timing belt. A smooth and quiet operation of the water pump pulley requires testing the bearing for proper function so if any issues occur the pump should be replaced. The fluid coupling service requires removal of its 4 nuts and fan. Check the fluid coupling for damage as well as silicon oil leaks. Replace the coupling if needed before reinstalling the fan with its 4 nuts tightened to 7.4 Nm (75 kgf-cm, 65 inch lbs.). Inspect both the fan pulley bracket for smooth operation and check whether it needs replacement while testing the timing belt machine. First clean the water pump and cylinder block touch surfaces by removing all old packing material (FIPG) through a combination of razor blade and gasket scraper work then finish the components with non-residue solvent cleaning. Seal packing (Part No. 08826-00100 or equivalent) needs a 2 - 3 mm (0.08 - 0.12 inch) opening nozzle to apply to the water pump groove. Assemble the parts within 5 minutes of application but reapply if assembly occurs later. You need to apply the provided seal packing before you can install the 7 bolts of the water pump but you must tighten these bolts to 20 Nm (200 kgf-cm, 14 ft. lbs.). Afterward install the No.2 oil cooler hose followed by the thermostat and water inlet assembly and complete by attaching the timing belt.

Remove the water inlet and thermostat.

Use a razor blade and gasket scraper to clean all old packing from the gasket surfaces and sealing groove.

Apply seal packing (Part No. 08826-00100 or equivalent) to the water pump grooves using a nozzle with a 2 - 3 mm (0.08 - 0.12 inch) opening, ensuring to assemble parts within 5 minutes of application.

Loosen the water pump pulley nuts, the lock bolt and pivot bolt of the generator, and the adjusting bolt of the generator before removing the drive belt and the 4 water pump pulley nuts, with a torque specification of 21 Nm (210 kgf-cm, 16 ft. lbs.).

Inspect the fan pulley bracket for smooth turning and replace if necessary.

Check the smoothness of the fan pulley bracket and replace if necessary, and inspect the timing belt components.

Replace the water pump, and if coolant has leaked onto the timing belt, replace the timing belt as well.

Remove the 4 nuts and fan, ensuring the coupling is undamaged and free of silicon oil leaks; if necessary, replace it and reinstall the fan with the 4 nuts, torquing to 5.4 Nm (55 kgf-cm, 47 inch lbs.).

Remove the 2 bolts from the fan shroud, then disconnect the upper radiator hose from the radiator.

Take out the 2 clips and the No.2 fan shroud, then remove the 4 bolts and the No.1 fan shroud.

Visually check the air hole and water hole for coolant leakage.