How To Replace Fuel Filler Neck On Ford F150?

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Key Takeaways:

  • Replacing the fuel filler neck on a Ford F150 requires lifting the truck, draining the fuel tank, detaching hardware, removing the old filler neck, installing the new one, and refilling the tank.
  • Specific steps involve removing brackets, screws, bolts, clamps and disconnecting any electrical connections before maneuvering out the old filler neck.
  • Installation is the reverse, securing the new neck using the brackets, screws, bolts and clamps in their original positions.
  • Matching the replacement part to the truck’s year, make and model is crucial for proper fit and operation.
  • Safety considerations include supporting the truck, avoiding fuel spills, wearing protective gear, and disconnecting the battery.

The fuel filler neck is a crucial component of the fuel delivery system on the Ford F150 pickup truck. This tubular part channels gasoline from the fuel filler cap opening into the fuel tank. Like any other vehicle component, the filler neck may become damaged or degrade over time, necessitating replacement. Replacing this part properly is key to ensuring safe, spill-free refueling and optimal fuel system performance.

This article will provide a comprehensive, step-by-step overview of how to replace the fuel filler neck on a Ford F150. It will cover the complete process starting from preparatory steps like lifting and supporting the truck and draining the fuel tank. Each stage of the hardware removal, part installation, and refueling procedures will be explained in detail. Relevant tips, considerations, and precautions pertaining to filler neck selection, disassembly techniques, electrical connectors, and safety factors will also be discussed.

By the end of this guide, truck owners and DIYers will understand the complete replacement process to tackle this repair job safely and efficiently. Having a reliable fuel delivery system is critical for proper engine operation and driving enjoyment, so being able to swap out a worn filler neck is an essential skill for Ford F150 owners. The information presented here aims to equip readers with the knowledge to take on this project with confidence.

Step-by-Step Guide to Replacing the Fuel Filler Neck on a Ford F150

Step 1: Prepare the Vehicle and Drain the Fuel Tank

The first step is to raise and safely support the truck on jack stands to access the underside where the fuel filler neck is located. Use four sturdy jack stands and lift on a flat, level surface. Chock the rear wheels, engage the parking brake and verify the truck’s stability before proceeding.

To avoid fuel spills, use a siphoning kit to transfer the gas from the tank into an approved fuel storage container. Draining the tank also reduces the weight for easier maneuvering during the procedure. Make sure to relieve any pressure in the system by removing the fuel pump relay or fuse before disconnecting any fuel lines.

Step 2: Disconnect and Remove the Filler Neck Hardware

With the truck raised and the tank empty, locate the fuel filler neck along the frame rail. You’ll need to methodically detach any brackets, screws, bolts or retaining clips that secure the neck to the vehicle body. Mark their locations to aid reinstallation.

Also, disconnect any electrical connectors, vapor tubes or fuel lines attached to the neck assembly. Release the clamps at both the fuel tank and filler cap ends to fully detach the old filler neck. Be prepared for residual fuel by having a drain pan and rags handy.

Step 3: Maneuver Out the Old Filler Neck

Based on its design, the filler neck should now be loose enough to maneuver out from its mounting position through openings on the underside. Some twisting and turning may be required to work it free without damage.

Inspect the openings and repair any cracks in the body panels through which the neck fits. Also take note of any tabs, notches or orientation features that enable proper seating so the new neck can be aligned correctly. Clean any sealing surfaces in preparation for the new part.

Step 4: Install the Replacement Fuel Filler Neck

First compare the new replacement neck with the old unit to ensure the correct part was sourced for the vehicle’s year, make and model. Install any attaching grommets, seals or isolators before maneuvering the new neck into place through the body openings.

Connect and tighten any electrical wiring, vapor tubes and fuel lines to specification. Make sure all clamps, retaining clips, brackets, bolts and screws are reinstalled in their original locations and tightened securely. Check that the neck is properly positioned, aligned and supported.

Step 5: Lower the Truck, Refill the Fuel Tank and Check for Leaks

With the new filler neck fully installed, the truck can be lowered and any supports and jacks removed. Reinstall the fuel pump relay/fuse, then slowly refill the fuel tank to check for any leaks at connections. Start the engine to build fuel pressure and recheck for leaks. Add more fuel as needed to fill the tank.

Periodically inspect the new neck installation over the first few refueling cycles to ensure it continues to be leak-free. Report any problems immediately to avoid hazards. Properly installed, the replacement neck should provide years of reliable service.

Frequently Asked Questions

What specialized tools are needed to replace the filler neck?

You’ll need standard sockets, wrenches, screwdrivers and pry tools. A siphoning kit helps drain the tank. For stuck or corroded fasteners, penetrating oil or an impact wrench may be helpful. Using a vehicle lift is best, but a floor jack and jack stands work too.

How can I identify the correct replacement part for my F150?

Check the VIN number on the vehicle door jamb and use online parts lookup tools specific to your truck’s year, make and model. The part number is typically cast into the old filler neck. OEM Ford and quality aftermarket parts should fit and perform correctly.

What precautions should I take when working under the truck?

Always securely support the truck on jack stands. Wear protective gloves, eye wear and clothing in case of fuel spills or dripping. Disconnect the battery terminals to avoid electrical shorts and sparks. Keep an ABC fire extinguisher nearby when handling fuel system components.

Should I replace any other components while doing this job?

Inspect all fuel lines, seals and gaskets for cracks or damage. The lock ring, filler cap and rollover valve may also be due for replacement. Upgrade to a larger fuel tank if desired. Replacing related components now can prevent having to tear down the bed again later.

How can I prevent damaging the new filler neck during installation?

Work slowly and gently when maneuvering it into place. Use pry bars and screwdrivers carefully to avoid punctures. Ensure all body panel edges are smoothed and openings deburred. Apply protecitve wraps over the neck during the process and remove once fully secured.

Are there any installation errors I should watch out for?

Yes – incorrectly orienting the filler neck, overtightening clamps or hardware, pinching electrical wires, missing a fuel line connection, and inadequate anchoring can all cause problems. Perform a thorough leak check before driving the truck.

Should I take any specific safety precautions when doing this replacement?

Yes, always use jack stands, chock tires, disconnect the battery, remove fuel pump fuse, and have an ABC fire extinguisher available. Avoid sparks, flames, and ignition sources as gasoline and vapors are highly flammable. Wear protective gloves and eyewear when handling fuel components.

Can I just replace the filler neck myself or do I need a shop?

With some mechanical ability, most DIYers can replace the filler neck on an F150 themselves. Just follow all the proper procedures and safety steps. However, if you don’t feel fully confident, having a professional shop do the work may be advisable.

How can I avoid damage when removing rusty filler neck hardware?

Apply penetrating oil generously ahead of time to loosen the fasteners. Carefully heat stuck bolts and nuts with a small torch. Use a manual wrench for better leverage and feedback. Seek assistance if hardware spins freely without loosening.

What’s the easiest way to drain the fuel tank?

Use a siphon pump kit to transfer the gasoline into an approved fuel storage container. Insert the tube through the filler neck opening after relieving any pressure in the system. This avoids having to drop the whole tank for drainage.


Replacing the fuel filler neck on a Ford F150 involves carefully following a series of steps for safe and effective repair. Advance preparation like raising the truck and draining the tank streamlines the process. Methodically detaching all filler neck hardware allows maneuvering out the old part. Meticulously installing the new neck and reconnecting all systems is then done before lowering the truck and refilling the tank.

Matching the replacement part to the specific truck model is crucial, as is taking necessary safety measures. With proper mechanical skills and the steps outlined here, most DIYers can tackle this repair job themselves, restoring smooth fuel filling performance to their F150. Just allow sufficient time and diligently adhere to each stage of the procedure.

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