Mopar 4792771AC Exhaust Manifold

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Disconnect the cable from the negative terminal of the battery. Block the rear wheels, set the parking brake, raise the front of the vehicle and support it securely on jackstands. Disconnect the downstream oxygen sensor connectors. Remove the engine middle splash shield. Unbolt the exhaust pipes at the exhaust manifolds. Lower the vehicle. Working in the engine compartment, disconnect the oxygen sensor's electrical connector. If removing the right exhaust manifold, detach the EGR pipe from the top of the manifold. If removing the left manifold, remove the air filter housing and the engine oil dipstick tube. Remove the exhaust manifold upper heat shield mounting bolts and remove the heat shields. Remove the mounting bolts and detach the manifold from the cylinder head. Be sure to spray penetrating lubricant onto the bolts and threads before attempting to remove them. Clean the mating surfaces to remove all traces of old gasket material, then inspect the manifold for distortion and cracks. Warpage can be checked with a precision straightedge held against the mating flange. If a feeler gauge thicker than 0.030-inch can be inserted between the straightedge and flange surface, take the manifold to an automotive machine shop for resurfacing. Place the exhaust manifold in position with a new gasket and the lower heat shields and install the mounting bolts finger tight. Starting in the middle and working out toward the ends, tighten the mounting bolts in several increments, to the torque. Install the remaining components in the reverse order of removal. Start the engine and check for exhaust leaks between the manifold and cylinder head and between the manifold and exhaust pipe.

Disconnect the cable from the negative terminal of the battery. Block the rear wheels, set the parking brake, raise the front of the vehicle and support it securely on jackstands. Disconnect the downstream oxygen sensor connectors. Remove the engine middle splash shield. Unbolt the exhaust pipes at the exhaust manifolds. Lower the vehicle. Working in the engine compartment, disconnect the oxygen sensor's electrical connector. If removing the right exhaust manifold, detach the EGR pipe from the top of the manifold. If removing the left manifold, remove the air filter housing and the engine oil dipstick tube. Remove the exhaust manifold upper heat shield mounting bolts and remove the heat shields. Remove the mounting bolts and detach the manifold from the cylinder head. Be sure to spray penetrating lubricant onto the bolts and threads before attempting to remove them. Clean the mating surfaces to remove all traces of old gasket material, then inspect the manifold for distortion and cracks. Warpage can be checked with a precision straightedge held against the mating flange. If a feeler gauge thicker than 0.030-inch can be inserted between the straightedge and flange surface, take the manifold to an automotive machine shop for resurfacing. Place the exhaust manifold in position with a new gasket and the lower heat shields and install the mounting bolts finger tight. Starting in the middle and working out toward the ends, tighten the mounting bolts in several increments, to the torque. Install the remaining components in the reverse order of removal. Start the engine and check for exhaust leaks between the manifold and cylinder head and between the manifold and exhaust pipe.

Disconnect the cable from the negative terminal of the battery. Raise the front of the vehicle and support it securely on jackstands. Remove the engine splash shield. Detach the exhaust pipes from the exhaust manifolds. Connect an engine hoist to the engine and remove the engine mount-to-subframe fasteners. Working from the engine compartment, disconnect the oxygen sensors electrical connectors and remove the sensors. Remove the exhaust manifold heat shield mounting bolts/nuts and remove the heat shield. Remove the bolts retaining the exhaust manifold to the cylinder head. Raise the engine up enough to allow the exhaust manifold to be removed. Clean the manifold and head gasket surfaces and check for cracks and flatness. Replace the exhaust manifold gaskets. Install the exhaust manifold(s) and fasteners. Tighten the bolts/nuts to the torque. Work from the center to the ends and approach the final torque. Install the heat shields. Apply anti-seize compound to the exhaust pipe-to-exhaust manifold bolts and tighten them securely. Installation is otherwise the reverse of the removal procedure.

Replace the exhaust manifold gaskets.

Take it to an automotive machine shop for resurfacing.

Spray penetrating oil on the bolts.

Remove the exhaust manifold heat shield mounting bolts/nuts and remove the heat shield.

In the engine compartment, you should disconnect the oxygen sensor's electrical connector. If removing the right exhaust manifold, detach the EGR pipe from the top of the manifold. If removing the left manifold, remove the air filter housing and the engine oil dipstick tube.

Clean the mating surfaces to remove all traces of old gasket material and inspect the manifold for distortion and cracks.