Scion G9040-52010 Inverter Water Pump Assembly(W/Motor)

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The removal of the water pump involves several steps. For 2009 and earlier models, start by disconnecting the cable from the negative terminal of the auxiliary battery and draining the cooling system. Next, remove the engine drive belt and support the engine with a Jack stand. After that, remove the right-side engine mount and bracket, then use a screwdriver while removing the pulley bolts. Remove the fasteners and carefully take out the water pump, remembering its original bolt position. Installation begins with cleaning the sealing surfaces and the replacement of the gasket with a new one. Install the fasteners in their original positions, ensuring proper torque specifications. Reassemble the remaining parts in the reverse order of removal, refill the cooling system, run the engine, and check for any leaks or issues. For 2010 and later models, detach the coolant hose from the inlet air filter and disconnect the wiring harness. Remove the bolts and the inlet air filter assembly, then drain the engine coolant. Disconnect the wiring from the water pump and remove the mounting bolts. Pull out the water pump from the timing chain cover, discarding the gasket O-ring. During installation, follow the reverse order of removal. Replace the gasket O-ring with a new one and tighten the bolts.

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.

If the water pump shaft bearings fail, there may be a howling sound at the front of the engine while it is running.

A failure in the water pump can lead to engine damage due to overheating.