GM 19420233 Manifold Assembly,Exh (W/ 3Way Ctltc Conv, Kit)

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For the 1.4L engine, the turbocharger is integrated into the exhaust manifold and cannot be serviced separately. On 2016 and later models, the exhaust manifold is integral to the cylinder head. For the 1.8L engine, the catalytic converter is also integrated into the exhaust manifold and cannot be serviced separately. To begin removal, disconnect the cable from the negative battery terminal, then remove the exhaust manifold heat shield. Raise the vehicle and support it securely on jackstands. Detach the exhaust pipe from the manifold/catalytic converter by soaking the retaining nuts with penetrating oil before unscrewing them. Follow the lead from the oxygen sensor to its electrical connector, unplug it, and detach the lead from its retaining clip. Remove the exhaust manifold support bracket bolts to the engine block while leaving the support bracket attached to the converter. Next, remove the exhaust manifold mounting nuts and detach the manifold assembly from the cylinder head. For installation, thoroughly clean the mating surfaces on the cylinder head, manifold, and exhaust pipe using a scraper and brake system cleaner. Ensure the mating surfaces are flat and undamaged; a warped or damaged manifold may need machining or replacement. Install the new gasket onto the cylinder head studs and place the manifold on the cylinder head, tightening the nuts evenly from the center outwards to the specified torque. Connect the exhaust pipe to the manifold and tighten the nuts evenly to the specified torque. The remainder of the installation follows the reverse order of removal. Finally, reconnect the battery and run the engine to check for exhaust leaks.