Lexus 16100-09690 Engine Water Pump Assembly

Bearing wear can be felt if the water pump pulley is rocked up and down.

1. Remove the right side inner fender splash shield, then remove the engine movement control rod and bracket, and the engine stay. 2. Remove the drivebelt and the alternator. 3. Loosen the water pump pulley bolts using a pin spanner to hold the water pump pulley, then unscrew the bolts and remove the pulley. 4. Remove the wiring harness from the clamp on the water pump and harness bracket. 5. Remove the water pump mounting fasteners and pry the water pump from the housing. 6. Thoroughly clean all sealing surfaces, removing all traces of old gasket material. 7. Installation is the reverse of removal. Tighten the fasteners to the torque. 8. Refill the cooling system, run the engine, and check for leaks and proper operation.