Mopar 68045438AB Exhaust Manifold

Before you begin the removal of the exhaust manifold the following instructions should be followed; Switch off the starter motor and disconnect the cable from the negative terminal. Chock the rear wheels, engage the parking brake, lift the front of the vehicle and safely latch the jackstands. Loosen the exhaust pipe from the bolt that is attached to the exhaust manifold. For 4.7L V8 models it is necessary to disconnect the drivebelt, remove engine coolant, take out the air inlet duct and remove air filter housing. Then you have to take off the air conditioning compressor, and also the accumulator bracket and separate the heater hoses at the engine and at the starter. All models: take off the exhaust manifold heat shields, then take out the exhaust manifold mounting bolts and the manifold will come off the vehicle. Before sealing up flush and remove old gasket deposits on mating surfaces inspect manifold for distortion and cracks visually check for manfold warpage with a straight edge. Note: If this is not enough, one should not hesitate to carry the manifold to an automotive machine shop for resurfacing. Fit the exhaust manifold with a new gasket into position and tighten down the mounting bolts just enough to be finger tight. Then, just as previously, starting at the center and gradually moving toward the end, and then the same in the opposite direction, to the set torque, tighten the mounting bolts and also the bolts to fasten the heat shield. Replace the rest of the parts in the manner in opposite order to the extraction and in case of 4.7L right side exhaust manifold replace the coolant. Last, the engine should be run and blown exhaust can be checked between the manifold and cylinder head as well as the manifold and exhaust pipe.

Before removing the exhaust manifold, one has to undo the cable that connects to the negative terminal of the battery. Furthermore, lift the vehicle and safely set it on jackstands, then loosen the exhaust pipe-to-manifold connections and apply penetrating oil to the studs/bolts and leave for approximately 10 minutes. Lower the vehicle and unbolt the heat shield nuts then remove the heat shield. Subsequently, an engine support fixture or an engine hoist should be attached to the engine and the through bolts of the engine mount should be undone; the engine should then be lifted to a level whereby the manifold could be pulled out. Go ahead and unbolt the exhaust manifold to cylinder head and thereafter, pull off the exhaust manifold(s). To install, do the reverse of the removal process-clean the manifold and head gasket's surfaces, inspect for cracks and flatness, replace the exhaust manifold gaskets. Position the exhaust manifold(s) and nuts/bolts, and tighten the bolts/nuts in a convoy pattern from the middle towards the extremities and with incremental tightening procedures to the final torque value. Last, fit the heat shields and apply anti seize to exhaust pipe to exhaust manifold bolts and torque them.