Toyota 16100-29156 Engine Water Pump Assembly

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To eliminate the belt as a possible cause of the noise, spray automotive drive belt dressing on the belt.

To remove the water pump, start by draining the cooling system and raising the front of the car. Remove the driver's-side engine lower cover and loosen the water pump pulley bolts. Remove the auxiliary drivebelt and then the water pump pulley. Unscrew the bolts and nuts to withdraw the water pump, being prepared for water spillage. Inspect the pump for coolant leakage and listen for any noisy bearings. When refitting, clean the mating faces of the water pump and cylinder block and use a new gasket. Tighten all fixings to the specified torque and refill the cooling system.

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 12-volt battery and draining the cooling system. Remove the engine drive belt and support the right end of the engine with a floor jack. Remove the right-side engine mount and bracket, then use a screwdriver to prevent the pulley from turning while removing the pulley bolts. Take note of the length and position of the bolts. Remove the fasteners holding the water pump to the engine block and carefully take out the water pump, remembering its original bolt placement. Installation begins with a thorough cleaning of all 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, start by detaching the coolant hose from the inlet air filter and disconnecting 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 to the specified torque.

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