Ford 6F9Z-5G274-B
Exhaust Pipe

Service the exhaust Y-pipe only when the vehicle sits in NEUTRAL mode on a hoist so that the exhaust system can reach full temperature equilibrium because of high operating temperatures near the catalytic converter. Exhaust fasteners have torque prevailing designs so only new fasteners with identical original part numbers should be used and reassembly torque values need precise adherence to maintain proper component retention. Installation of the new nuts should start with catalytic converter-to-Y-pipe nut removal followed by parallel exhaust flange maintenance through alternating 40 Nm (30 lb-ft) torque applications. Move on to the removal and waste of the two Y-pipe-to-underbody catalytic converter nuts before torqueing new nuts using the same specification. The Y-pipe-to-underbody catalytic converter gasket needs replacement with a new gasket after its removal and disposal. Seamlessly inspect the isolator and get a new one if needed before taking off the Y-pipe isolator and removing the Y-pipe. The Y-pipe isolator bracket bolts and bracket can be removed but need reinstallation with a torque of 30 Nm (22 lb-ft). Install the exhaust system by cleaning its fittings first then proceeding backward through installation steps yet always using fresh gaskets and exhaust fasteners.