Toyota 16100-79445 Engine Water Pump Assembly

To replace the water pump, first disconnect the negative battery cable. For PreRunner or 4WD models, remove the forward under-vehicle splash shield. Drain the cooling system, and if applicable, remove the engine cover. Remove the drive belt, Cooling Fan Assembly, and for four-cylinder models, remove the alternator, drive belt tensioner, and water pump bolts. Clean the gasket mating surfaces, install a new gasket and water pump, and tighten the bolts to the specified torque. Refill the cooling system, start the engine, and check for leaks. For V6 models, remove the air filter assembly, oil cooler hoses, coolant bypass hoses, water inlet assembly, idler pulleys, and alternator. Set aside the A/C Compressor, and remove the drive belt tensioner and water pump bolts. Clean the gasket surfaces, install a new gasket, water pump, and a new O-ring on the water pump. Install the water inlet assembly, tighten the fasteners to the correct torque, refill the cooling system, start the engine, and inspect for leaks.