Fuel Rail Outlet Pipe Replacement

Fuel Rail Outlet Pipe Replacement


IMPORTANT: The fuel rail for the 5.3L regular production option (RPO) L59 (VIN Z) engine is compatible with fuel that has a composition of up to 85 percent Ethanol (E85). Because of this, the fuel rail will be service as an entire assembly this includes both left and right rail assemblies and fuel return pipe.







REMOVAL PROCEDURE
1. Relieve the fuel system pressure. Refer to the Fuel Pressure Relief Procedure.
Fuel Pressure Release
2. Disconnect the fuel feed pipe and return pipes (1) from the fuel rail.







3. Remove the retaining clip attaching screw (4).
4. Remove the crossover fuel pipe retainer clip (5).
5. Remove the fuel return pipe attaching screw (3) and the fuel return pipe retainer (2).
6. Remove the fuel return pipe (1).
7. Remove and discard the fuel return pipe O-ring (6).







INSTALLATION PROCEDURE
1. Lubricate a NEW fuel return pipe O-ring (6) with clean engine oil.
2. Install the fuel return pipe O-ring (6) onto the fuel return pipe (1).
3. Install the fuel return pipe (1).
4. Install the fuel return pipe retainer (2) and the fuel return pipe attaching screw (3).
5. Install the crossover fuel pipe retainer clip (5).

NOTE: Refer to the Fastener Notice in Service Precautions Fastener Notice.

IMPORTANT: When installing the retaining clip attaching screw for the crossover pipe, always start the screw by hand. This will prevent consequent stripping of the threads in the rail.

6. Install the retaining clip attaching screw (4).

Tighten
- Tighten the crossover fuel pipe retainer clip attaching screw (4) to ...........................3.8 N.m (34 lb in).
- Tighten the fuel return pipe attaching screw (3) to ..............................5 N.m (44 lb in).







1. Connect the fuel feed pipe and return pipes (1) from the fuel rail.
2. Install the fuel fill cap.
3. Connect the negative battery cable.
4. Use the following procedure in order to inspect for leaks:
4.1. Turn the ignition ON, with the engine OFF, for 2 seconds.
4.2. Turn the ignition OFF for 10 seconds.
4.3. Turn the ignition ON, with the engine OFF.
4.4. Inspect for fuel leaks.