Fuel Filler Neck

Remove and replace the fuel filler neck assembly on a 2014 Ram 2500 with 6.7L Cummins diesel engine, including disconnecting hoses, removing mounting hardware, and reinstalling with proper torque specifications.

Warnings

Tools required

Parts

• Fuel filler neck assembly × 1 — Use OEM specification
• Fuel filler neck seal/grommet × 1 — Use OEM specification
• Hose clamps (if corroded) × 2 — Use OEM specification

Preparation

1. Park vehicle on level ground and engage parking brake
2. Chock rear wheels if raising the vehicle
3. Open fuel filler door and remove fuel cap to relieve any pressure in the tank
4. Raise rear of vehicle and support securely on jack stands if access from underneath is needed
5. Place drain pan beneath fuel filler neck area to catch residual fuel
6. Have shop towels ready to contain fuel spillage

Procedure

1. 1

   Access the filler neck from inside bed
   Remove the bed access panel or filler neck access cover located in the driver side rear bed area. Remove the cover screws and carefully lift away the access panel to expose the filler neck mounting area.
   Torque spec

   Cover Screws15 Nm (11 lb-ft)
2. 2

   Disconnect the filler neck hose at tank
   Locate the rubber hose connecting the filler neck to the fuel tank. Loosen the hose clamp at the tank connection point using a flat blade screwdriver or hose clamp pliers. Carefully twist and pull the hose away from the tank fitting. Some fuel will drain out - direct it into the drain pan.
   ⚠Expect fuel spillage when disconnecting hoses. Keep drain pan positioned properly and have towels ready.
   Torque spec

   Hose Clamps3 Nm (2 lb-ft)
3. 3

   Disconnect vent hose
   Locate the smaller vent hose connected to the filler neck assembly. Loosen the hose clamp and disconnect the vent hose from the filler neck. Note the routing for reinstallation.
   Torque spec

   Hose Clamps3 Nm (2 lb-ft)
4. 4

   Remove bracket mounting hardware
   Locate the bracket bolts securing the filler neck support bracket to the vehicle body. Remove these bolts using the appropriate socket. There are typically 2-3 bracket mounting points along the filler neck assembly.
   Torque spec

   Bracket Bolts27 Nm (20 lb-ft)
5. 5

   Remove filler neck mounting bolts
   Locate the filler neck bolts at the fuel tank inlet connection point. Remove these bolts that secure the filler neck flange to the fuel tank. Support the filler neck assembly as you remove the final bolt.
   Torque spec

   Filler Neck Bolts10 Nm (7 lb-ft)
6. 6

   Extract filler neck assembly
   Carefully maneuver the filler neck assembly out of the vehicle body. The neck must be angled and rotated to clear the bed and body panels. Work slowly to avoid damaging painted surfaces. Remove the old seal/grommet from the body opening.
   ⚠The filler neck is awkward and may contain residual fuel. Have an assistant help guide it out to prevent spills and body damage.
7. 7

   Prepare new filler neck
   Inspect the new filler neck assembly for shipping damage. Install the new seal/grommet onto the filler neck body section that interfaces with the vehicle body opening. Ensure the seal is properly seated in its groove.
   ℹ️Verify all hose connections on the new filler neck match the old assembly before proceeding with installation.
8. 8

   Install new filler neck assembly
   Carefully guide the new filler neck assembly into position, routing it through the body opening. Ensure the seal/grommet seats properly in the body opening. Align the filler neck flange with the mounting holes at the fuel tank connection point.
   ⚠Do not force the filler neck into position. Rotate and angle as needed to avoid damaging the new seal or painted surfaces.
9. 9

   Install filler neck mounting bolts
   Install the filler neck bolts through the flange and into the fuel tank mounting points. Start all bolts by hand, then tighten in a cross pattern to the specified torque of 10.0 Nm (7.0 lb-ft) using a torque wrench.
   Torque spec

   Filler Neck Bolts10 Nm (7 lb-ft)
10. 10

    Install bracket mounting hardware
    Position the support brackets and install the bracket bolts. Ensure all brackets are properly aligned with their mounting points. Tighten bracket bolts to 27.0 Nm (20.0 lb-ft) using a torque wrench.
    Torque spec

    Bracket Bolts27 Nm (20 lb-ft)
11. 11

    Reconnect vent hose
    Reconnect the vent hose to the filler neck assembly, ensuring it is fully seated on the fitting. Position the hose clamp over the connection point and tighten to 3.0 Nm (2.0 lb-ft). Verify the hose follows its original routing.
    Torque spec

    Hose Clamps3 Nm (2 lb-ft)
12. 12

    Reconnect filler neck hose to tank
    Slide the rubber filler hose onto the tank connection fitting, ensuring it is fully seated. Position the hose clamp over the connection area and tighten to 3.0 Nm (2.0 lb-ft). Verify the connection is secure with no gaps.
    Torque spec

    Hose Clamps3 Nm (2 lb-ft)
13. 13

    Reinstall access panel
    Position the bed access panel or cover back in place. Install the cover screws and tighten to 15.0 Nm (11.0 lb-ft) using a torque wrench. Ensure the panel sits flush with the bed surface.
    Torque spec

    Cover Screws15 Nm (11 lb-ft)

Reassembly

1. Lower vehicle from jack stands if raised
2. Clean any fuel residue from vehicle body and components
3. Dispose of old filler neck assembly and contaminated shop towels according to local regulations

Verification

• Install fuel cap and close filler door
• Add a small amount of diesel fuel (1-2 gallons) to verify proper flow through new filler neck
• Inspect all connections for fuel leaks while filling
• Check underneath vehicle for any drips or seepage at hose connections
• Start engine and verify no fuel odors or visible leaks during operation
• Perform a final inspection after a short test drive to confirm all connections remain secure

More procedures for this vehicle