Exhaust Y-Pipe - Gasoline Engines: Removal

WARNING: This page is about a different car, the 2007 Ford Pickup, 2007 Ford F550 Super Duty, 2007 Ford F450 Super Duty, and 2007 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Exhaust fasteners are of a torque prevailing design. Use only new fasteners with the same part number as the original. Torque values must be used as specified during reassembly to make sure of correct retention of exhaust components.

NOTE: Exhaust Y-pipe with dual catalytic converters shown, exhaust Y-pipe with no catalytic converters similar.

With the vehicle in NEUTRAL, position it on a hoist. For additional information, refer to JACKING AND LIFTING article.
Disconnect the 2 heated oxygen sensors (HO2S) and the 2 catalytic monitor electrical connectors.
Support the exhaust Y-pipe near the rear outlet.
Remove and discard the 4 exhaust Y-pipe flange nuts, then remove and discard the gasket.

Fig 1: Removing Exhaust Y-Pipe Flange Nuts And Gasket
Courtesy of FORD MOTOR CO.

NOTE: LH exhaust manifold-to-exhaust Y-pipe shown, RH similar.

Fig 2: Removing Exhaust Y-Pipe Assembly Nuts

Courtesy of FORD MOTOR CO.

Remove the 4 nuts and the exhaust Y-pipe assembly.

NOTE: Vehicles with dual catalytic converters in the exhaust Y-pipe have catalyst monitors in the Y-pipe. Vehicles with standard exhaust Y-pipe with no catalytic converter have a single catalyst monitor in the underbody catalytic converter.

Fig 3: Locating Catalyst Monitor Sensors

Courtesy of FORD MOTOR CO.

If installing a new exhaust Y-pipe with dual catalytic converters, remove the catalyst monitor sensors.
If installing new exhaust Y-pipe, remove the HO2S.

Fig 4: Locating HO2S
Courtesy of FORD MOTOR CO.