Exhaust Y-Pipe - Gasoline Engines: Installation

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: Do not tighten any fasteners until all components are aligned.

NOTE: Apply anti-seize to the threads of the HO2S before installation.

Fig 1: Locating HO2S

Courtesy of FORD MOTOR CO.

If removed, install the HO2S.
- Tighten to 46 Nm (34 lb-ft).

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

NOTE: Apply anti-seize to the threads of the catalyst monitor sensor before installation.

Fig 2: Locating Catalyst Monitor Sensors

Courtesy of FORD MOTOR CO.

If removed, install the catalyst monitor sensors.
- Tighten to 46 Nm (34 lb-ft).
Position the exhaust Y-pipe.
Loosely install the 4 exhaust Y-pipe-to-exhaust manifold nuts

NOTE: Install a new exhaust Y-pipe flange gasket.

Fig 3: Installing Catalytic Converter Exhaust Flange Nuts And Gasket

Courtesy of FORD MOTOR CO.

Install a new exhaust Y-pipe flange gasket and loosely install the 4 catalytic converter exhaust flange nuts.

NOTE: Make sure the exhaust Y-pipe is aligned to provide maximum clearance to adjacent parts.

Fig 4: Locating LH Exhaust Y-Pipe Assembly Nuts

Courtesy of FORD MOTOR CO.

To seat the LH exhaust manifold-to-exhaust Y-pipe nuts, tighten the nuts in the following sequence.
- Tighten the lower LH exhaust manifold-to-exhaust Y-pipe nut to 20 Nm (15 lb-ft).
- Tighten the upper LH exhaust manifold-to-exhaust Y-pipe nut to 40 Nm (30 lb-ft).
- Tighten the lower LH exhaust manifold-to-exhaust Y-pipe nut to 40 Nm (30 lb-ft).

NOTE: Make sure the exhaust Y-pipe is aligned to provide maximum clearance to adjacent parts.

Fig 5: Locating RH Exhaust Y-Pipe Assembly Nuts

Courtesy of FORD MOTOR CO.

To seat the RH exhaust manifold-to-Y-pipe nuts, tighten the nuts in the following sequence.
- Tighten the lower RH exhaust manifold-to-exhaust Y-pipe nut to 20 Nm (15 lb-ft).
- Tighten the upper RH exhaust manifold-to-exhaust Y-pipe nut to 40 Nm (30 lb-ft).
- Tighten the lower RH exhaust manifold-to-exhaust Y-pipe nut to 40 Nm (30 lb-ft).
Tighten the 4 exhaust Y-pipe flange nuts
- Tighten to 40 Nm (30 lb-ft).
Connect the 2 heated oxygen sensors (HO2S) and the 2 catalytic monitor electrical connectors.