GM 13592753 Auxiliary Water Pump Assembly

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To replace the pump on 1.5L engines start by draining the cooling system and loosening the right front wheel lug nuts. Raise the vehicle and secure it on jackstands and remove wheel and inner fender splash shield. Remove drivebelt and drivebelt tensioner as well as disengaging wiring harness retainers and moving away from water pump. If it does not come out easily, gently tap with a soft-faced hammer to ensure it is free from the housing, then remove water pump pulley housing bolts. Clean mounting surfaces of old gasket seal, clean mounting bolt threads and threaded holes; compare replacement pump with old one. New gasket should be used during installation, mount bolts that hold onto it finger-tighten them then torque them to specified setting. Refill the cooling system, start engine and check for leaks. For replacing water pump housing on 1 .5L engines begin by removing charge air cooler inlet air tube and thermostat housing. Disconnect hose clamps & hoses from thermostat water bypass tube, remove tube bracket bolt, tube-to-water pump housing bolts & tube with gasket. Also, turbocharger oil feed pipe retaining clip has to be removed as well as pipe disconnected from it. Remove engine oil cooler along with turbocharger coolant inlet pipe too. Remove water pump housing bolts and clean old gasket seal from engine surface & water pump housing too.Use new gasket during installation, put in position the mounting bolts finger-tightening them before tightening them to specified torque.Refill cooling system, start engine and look for leaks. For 2 .0 L & 2 .5 L engines exhaust manifold heat shield plus thermostat housing will have to be removed.Remove thermostat bypass tube fasteners together with its gasket; likewise.Remove the water pump housing bolts wiping off any mating surface of engine.Compare new replacement with original one then place into position gasket against that of waterpump before installing new mounting bolts finger-tightening. Finally, tighten water pump housing mounting bolts in a criss-cross pattern to specified torque value. The remaining installation steps are to tighten the water pump pulley bolts to the specified torque, refill the cooling system, start the engine, and check for leaks.