Ford 6F9Z-5230-A
Rear Muffler

The service procedure for muffler and tailpipe assembly requires exhaust system temperature to cool down because of high operational temperatures at the catalytic converter area. The use of oil-based or grease-based lubricants on isolators should be prevented because they cause rubber degradation which leads to separation with the exhaust hanger bracket while operating. The first step includes placing the vehicle in NEUTRAL gear while preparing it on a hoist system then using a jack stand to maintain the muffler and tailpipe assembly. Start by loosening the Torca clamp and replacing it with new parts having the same original part number before tightening the fasteners to 47 Nm (35 ft. lbs.). First disconnect both front and rear muffler isolators then inspect them for any sign of wear because worn components need replacement. Then remove both the resonator isolator and the assembly of muffler and tailpipe. You should disconnect the muffler rear isolator bracket bolts first followed by removal of the bracket before reinstalling it with proper torque setting at 30 Nm (22 ft. lbs.). Before installing reverse through the removal process it is necessary to clean all exhaust system connection mating surfaces.