Fuel Rail - Installation

6.4L

CAUTION: The left and right fuel rails are replaced as an assembly. Do not attempt to separate fuel rail halves at connector tube. Due to design of the connector tube, it does not use any clamps. Never attempt to install a clamping device of any kind to the connector tube. When removing fuel rail assembly for any reason, be careful not to bend or kink the connector tube.






NOTE: The fuel injector O-rings may be used again, provided no cuts, tears, or deformation have occurred.

1. Inspect the fuel injector O-rings (3) and replace if necessary.
2. Clean out the fuel injector machined bores in the intake manifold.
3. Apply a small amount of engine oil to each fuel injector O-ring (3).





4. Position fuel rail/fuel injector assembly (1) into the machined fuel injector bores of the intake manifold.
5. Guide each injector into the intake manifold using care not to tear the fuel injector O-rings.
6. Push the right fuel rail down until the fuel injectors have bottomed on shoulders.
7. Push the left fuel rail down until the fuel injectors have bottomed on shoulders.
8. Install the four fuel rail retaining bolts (2) and tighten to 11 Nm (8 ft. lbs.).





9. Connect the fuel line (1) to the fuel rail Service and Repair.
10. Connect the left side fuel injector electrical connectors (2).
11. Connect the EVAP vacuum line (3).





12. Connect the PCV hose (1).
13. Connect the right side fuel injector electrical connectors (3).





14. Install the engine covers (1).





15. Connect the negative battery cable (1).
16. Start the engine and check for leaks.