Toyota G9040-48020 Inverter Water Pump Assembly (W/Motor)

Take the negative car battery cable off, then let the cooling system empty. First, remove three things on your 2.4L vehicle: the right side inner fender splash shield, engine movement control rod and bracket, and engine stay. Undo the drivebelt and alternator, put in a pin spanner on the water pump pulley bolts, and take out the pulley. Unplug the wiring from the water pump and take out the mounting screws. Then slide the water pump off its mounting location. Use cleaning solution to make sure all water pump mounting spots are cleared. Attach the new water pump with correct screw tightness. After filling the cooling system, start the engine, and look for any water loss from leaking parts. Before working on smaller engines, first take off the engine covers, radiator support trim cover, and inner fender splash shield. Then loosen and remove the drive belts, alternator, and tensioner. Put the pump back in place after removing its mounting bolts. Clean all sealing surfaces, and set the new pump correctly, making sure you apply the right amount of force on the fasteners. Replenish the cooling fluid, turn on the engine, and look for dripping liquid. To service these engines, you first need to take off the timing belt, and then the camshaft sprockets and number 2 idler pulley. When finished, detach the number 3 timing belt cover. First, remove both water pump mounting bolts or nuts. Then pull the pump off the engine, rinse all contact areas clean, and place a fresh metal/gum gasket when reinstalling. Refill the cooling system and check for leaks. To start work on a 3.5L engine, support it with a floor jack, take off the engine covers, drivebelt, engine's electrical ground connection piece, and engine clamp holders. Take off the idler and tensioner pulley pieces of the drivebelt, then stop the water pump pulley from spinning with a special holding tool while you unscrew its mounting bolts. First take off the inlet or thermostat gasket where coolant enters, then you can pull out the water pump and gasket, keeping track of the longer vs shorter water pump bolt lengths. Wipe surfaces clean, add a new water pump seal, and make sure lock bolts reach their correct tightening force. Reassemble the water inlet housing, seal it with a new gasket and O-ring, finish building everything back, add new cooling liquid, and look for leaks in the system.

To remove the water pump on 2009 and earlier models, you should disconnect the cable from the negative terminal of the auxiliary 12-volt battery, drain the cooling system, and remove the engine drive belt.

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.