LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Ford >> 2021 >> Edge ST >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Fuel Charging And Controls - 2.7L ECOBOOST (238KW/324PS) >> Removal And Installation >> Fuel Rail >> Installation
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Fuel Rail: Installation

Both fuel rails 

  1. NOTE: Do not lubricate the new lower Teflon® fuel injector seal.

    1. Install the Arbor on the fuel injector tip. Use Special Service Tool: 310-207 Installer, Fuel Injector Seal Assembly.
    2. NOTE: Once the Teflon® seal is installed on the Teflon® Seal Guide, it should immediately be installed onto the fuel injector to avoid excessive expansion of the Teflon® seal.
      NOTE: Make sure that new lower fuel injector Teflon® seals are installed.

      Install the new Teflon® seal onto the Arbor, using the Pusher Tool (part of the Fuel Injector Seal Installer), slide the Teflon® seal along the Arbor.

    3. Using the Pusher Tool, slide the Teflon® seal off of the Teflon® Seal Guide and into the groove on the fuel injector. Use Special Service Tool: 310-207 Installer, Fuel Injector Seal Assembly.

    GFD594931Courtesy of FORD MOTOR COMPANY
  2. NOTE: Make sure the Teflon® seal is fully seated in the groove on the fuel injector before sizing the Teflon® seal.

    1. Massage and warm the Teflon® seal with your fingers before the Teflon® seal sizer tool is installed. This will aid in installing the Teflon® seal sizer tool.
    2. Position the Teflon® seal sizer tool with the larger opening towards the Teflon® seal. Push while turning the Teflon® seal sizer tool 180 degrees. Use Special Service Tool: 303-1567 Sizer, Teflon Seal.
    3. Once the Teflon® seal sizer tool is installed, check and make sure the Teflon® seal is in the sizing portion of the Teflon® seal sizer tool.
    4. After one minute, turn the Teflon® seal sizer tool back 180 degrees and remove.

    GFD594932Courtesy of FORD MOTOR COMPANY
  3. NOTE: Make sure that new fuel injector support rings and new fuel injector O-ring seals are installed.

    1. NOTE: Do not lubricate the new lower Teflon® fuel injector seals.
    2. NOTE: The new the fuel injector support rings must be installed in the correct orientation with the wide surface area facing up against the fuel injector O-ring seals. Improperly installed support rings may cause the fuel system to leak.

      Install the new the fuel injector support rings.

    3. Inspect the inlet stopper, if it is damaged or comes off then discard the inlet stopper. The inlet stopper is not needed for proper function. Ensure that any debris from the inlet stopper are removed. If the inlet stopper is intact and undamaged do not remove the inlet stopper from the fuel injector.
    4. The upper side of the support ring has the wide surface area.
    5. Fuel injector support ring.
    6. The lower side of the support ring has the narrow surface area.

    GFD594933Courtesy of FORD MOTOR COMPANY
  4. NOTE: Make sure that new fuel injector clips are installed.

    Install the new the fuel injector clips.

    GFD594934Courtesy of FORD MOTOR COMPANY

    Right fuel rail 

  5. NOTE: The anti-rotation finger of the fuel injector clip must slip into the groove of the fuel rail cup.

    Install the fuel injectors to the fuel rail.

    GFD594935Courtesy of FORD MOTOR COMPANY
  6. Connect the fuel injector electrical connectors.
    GFD594925Courtesy of FORD MOTOR COMPANY
  7. NOTE: Do not lubricate the new lower Teflon® fuel injector seals.

    Install the fuel rail, push down on the fuel rail above the fuel injectors, apply an even force to ensure that the fuel rail seats parallel to the cylinder head mounting bosses. Install the bolts and hand tighten until snug.

    Torque

    : Stage 1: Tighten the bolts one revolution at the time, in the sequence shown, until all of the fuel rail mounting brackets are seated flat on the cylinder head mounting bosses: : 1 turn(s) Stage 2: Tighten in the sequence shown to: : 18 lb.ft (24 Nm)

    Fig 1: Fuel Rail Tightening Sequence
    GFD594936Courtesy of FORD MOTOR COMPANY

  8. Attach the wiring harness retainer.
    GFD594923Courtesy of FORD MOTOR COMPANY
  9. NOTE: In stage 3, if the torque required to tighten any flare nut on the new high-pressure fuel tube reaches or exceeds 55 lb.ft (75 Nm), then that high pressure fuel tube must be discarded and replaced with another new high-pressure fuel tube.
    NOTE: Calculate the correct torque wrench setting for the following torque using the Torque Wrench Adapter Formulas. Refer to the torque wrench adapter formula in the graphic below
    G00468730Courtesy of FORD MOTOR COMPANY
    NOTE: Make sure that a new high-pressure fuel pump-to-fuel rail high-pressure fuel tube is installed.

    Install the high-pressure fuel pump-to-fuel rail high-pressure fuel tube and tighten the flare nuts finger tight, then tighten the flare nuts in the following 3 stages.

    Torque

    : Stage 1: Tighten to: : 62 lb.in (7 Nm) Stage 2: Tighten to: : 89 lb.in (10 Nm) Stage 3: Tighten an additional: : 25 deg.

    GFD594579Courtesy of FORD MOTOR COMPANY

    Left fuel rail 

  10. NOTE: The anti-rotation finger of the fuel injector clip must slip into the groove of the fuel rail cup.

    • Install the fuel injectors to the fuel rail.

    GFD594937Courtesy of FORD MOTOR COMPANY
  11. Connect the fuel injector electrical connectors.
    GFD594920Courtesy of FORD MOTOR COMPANY
  12. NOTE: Do not lubricate the new lower Teflon® fuel injector seals.

    Install the fuel rail, push down on the fuel rail above the fuel injectors, apply an even force to ensure that the fuel rail seats parallel to the cylinder head mounting bosses. Install the bolts and hand tighten until snug.

    Torque

    : Stage 1: Tighten the bolts one revolution at the time, in the sequence shown, until all of the fuel rail mounting brackets are seated flat on the cylinder head mounting bosses: : 1 turn(s) Stage 2: Tighten in the sequence shown to: : 18 lb.ft (24 Nm)

    Fig 2: Fuel Rail Tightening Sequence
    GFD594938Courtesy of FORD MOTOR COMPANY
  13. Attach the wiring harness retainer.
    GFD594918Courtesy of FORD MOTOR COMPANY

    Both fuel rails 

  14. NOTE: In stage 3, if the torque required to tighten any flare nut on the new high-pressure fuel tube reaches or exceeds 55 lb.ft (75 Nm), then that high pressure fuel tube must be discarded and replaced with another new high-pressure fuel tube.
    NOTE: Make sure that a new fuel rail to fuel rail high-pressure fuel tube is installed.
    NOTE: Calculate the correct torque wrench setting for the following torque using the Torque Wrench Adapter Formulas. Refer to the torque wrench adapter formula in the graphic below
    G00468730Courtesy of FORD MOTOR COMPANY

    Install the fuel rail to fuel rail high-pressure fuel tube and tighten the flare nuts finger tight, then tighten the flare nuts in the following 3 stages.

    Torque

    : Stage 1: Tighten to: : 62 lb.in (7 Nm) Stage 2: Tighten to: : 89 lb.in (10 Nm) Stage 3: Tighten an additional: : 25 deg.

    GFD594579Courtesy of FORD MOTOR COMPANY
  15. Install the intake manifold. Refer to: Intake Manifold
  16. Connect the battery. Refer to: Battery Disconnect and Connect
  17. Pressurize the fuel system. Refer to: Fuel System Pressure Release
scientia non olet · About LEMON Manuals