Ford 7H6Z-5G274-A
Front Pipe

You should service the 3.5L engine exhaust Y-pipe by using new fasteners and gaskets with clean flange surfaces before gasket application for complete sealing. Start by placing the vehicle onto a hoist system with the transmission unit in NEUTRAL position. UNTIE the 6 screws holding down the underbody shield only if it is installed. First remove the 2 Y-pipe resonator nuts along with the gasket before installing new nuts which should be tightened to 40 Nm (30 lb-ft). Discard the two Y-pipe-to-catalytic converter nuts on the right side followed by securing them to 40 Nm (30 lb-ft). First remove the 2 LH catalytic converter-to-exhaust Y-pipe nuts which needs to be discarded while taking out the exhaust Y-pipe with its gasket. The passenger nut should be tightened first to 5 Nm (44 lb-inch) and then the driver side nut should be tightened to 40 Nm (30 lb-ft) followed by a final tighten to 40 Nm (30 lb-ft) on the passenger nut. Reverse the removal steps by using new gaskets and nuts during installation. The installation process requires starting the engine for exhaust leak inspection.

A proper exhaust Y-pipe service or repair of a 3.5L engine must include replacement fasteners with new gaskets alongside flange cleaning to achieve optimal sealing functionality. Start the service with the vehicle in NEUTRAL while resting on a hoist system. Unscrew and remove any 6 screws as well as the underbody shield. The repair process starts with removing and discarding two exhaust Y-pipe-to-resonator nuts and the gasket. Installation of new nuts follows next before torquing them to 40 Nm (30 ft. lbs.). You should first remove and throw away the 2 RH catalytic converter-to-exhaust Y-pipe nuts and replace them with new ones that you should tighten to 40 Nm (30 ft. lbs.). Start by removing the two LH catalytic converter-to-exhaust Y-pipe nuts followed by extraction of the exhaust Y-pipe as well as the gasket disposal. Installation of the exhaust Y-pipe requires three-stage nut tightening between the passenger side first to 5 Nm (45 inch lbs.) then the driver side to 40 Nm (30 ft. lbs.) before finishing with the passenger side at 40 Nm (30 ft. lbs.). During reverse installation procedure follow the removal steps while using fresh gaskets and nuts. The engine should be started to inspect exhaust leakage after completing the installation.