Sylvie Willis
Removing the midship fuel tank from a Ford F-150 truck can be a challenging task. While some people suggest removing the tank shroud before the tank itself, others claim it is unnecessary. The process typically involves loosening the tank strap bolts, siphoning the tank dry, and removing the filler neck and vent tube. It is important to note that there may be differences in the process depending on the model year of the F-150, with some users reporting issues specific to the 1983 E350 model. In addition, there are considerations for trucks with plastic midship tanks, which may have different capacities and requirements for replacement. Overall, removing the midship fuel tank from an F-150 is a complex procedure that may require mechanical expertise and careful planning.
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What You'll Learn
Removing the midship fuel tank straps
To remove the midship fuel tank straps, you will need to first siphon the tanks until they are dry. Next, place a floor jack against a square of plywood under the tank for support. Then, remove the filler neck and vent tube.
The midship fuel tank straps are held in place by four nuts. Two of these nuts are easily accessible, but the other two are located in a confined space between the truck frame and a storage compartment. To remove the straps, start by removing the accessible nuts. Then, try to lower the tank by removing only the accessible nuts. If this does not work, you will need to remove the two remaining nuts in the confined space. This may require some creativity and flexibility due to the limited space.
Once all four nuts have been removed, the straps should be loose, and you can lower the jack just enough to unhook everything from the tank. When reinstalling the tank, simply reverse these steps.
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Removing the filler neck and vent tube
First and foremost, ensure that the fuel tank is completely empty, or "siphoned dry," before attempting any removal or maintenance work. This is a critical safety precaution to prevent any accidental fuel spills or leaks. Once the tank is empty, locate the filler neck and vent tube. These components are typically found near the fuel tank and are responsible for allowing fuel to enter the tank and for venting fumes.
To remove the filler neck and vent tube, start by loosening any clamps, hoses, or connections attached to them. Depending on the vehicle, you may need to disconnect electrical connectors or hoses that lead to the fuel pump. It is important to label or mark these connections to ensure proper reassembly. Use appropriate tools, such as wrenches or screwdrivers, to loosen any fasteners securely. Be gentle to avoid damaging nearby components or stripping the fasteners.
After detaching the necessary connections, carefully pull the filler neck and vent tube assembly away from the fuel tank. Inspect the removed parts for any signs of damage, cracks, or leaks. If necessary, replace them with new, compatible parts. Ensure that any gaskets or seals are also in good condition to prevent fuel leaks.
Finally, when reinstalling the filler neck and vent tube, follow the removal process in reverse. Ensure that all connections are securely tightened and that there are no leaks. Refer to the vehicle's service manual or seek guidance from a qualified mechanic if you encounter any issues or have specific questions about your particular vehicle.
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Dealing with a leaking tank
Identify the Leak Source
Before attempting any repairs, it is crucial to locate the source of the leak. Visually inspect the tank and its connections to identify any signs of dripping fuel or fuel puddles. Check the tank seam where the two halves connect, as this is a common area for leaks.
Prepare the Vehicle
Park your F150 on solid, flat ground to ensure stability during the repair process. Use a jack to lift the vehicle and provide access to the fuel tank from below. Place jack stands around the jack to securely support the vehicle's weight. Do not work underneath the vehicle unless you are confident it is safely supported.
Access the Fuel Tank
To access the midship fuel tank, you may need to remove any covers or panels that obstruct your access. Detach the fuel lines and electrical connections leading to the tank. It is recommended to run the vehicle low on fuel beforehand to make the tank lighter and easier to handle during removal.
Remove the Fuel Tank
Use a ratchet wrench to detach the fuel hoses from the tank. Unscrew the bolts on the straps holding the tank in place, and gently lower it. Be cautious when handling the tank, as it may contain residual fuel.
Repair or Replace the Tank
If the tank is drilled out or severely damaged, replacement may be necessary. However, if the leak is repairable, you have several options. For a simple fix, apply epoxy putty to cover the leak. This method can often be done without removing the tank. For a more permanent solution, welding the leak shut is an option, but it requires draining the tank and ensuring it is free from fumes to mitigate the risk of explosion. Alternatively, you can wash out the tank with soap and water, clean it with a wax and grease remover, and then use an etch primer to improve paint bonding and reduce future rusting.
Reinstall the Tank
Once the repair or replacement is complete, carefully reinstall the fuel tank by securing it with the straps and bolts. Reconnect the fuel lines and electrical connections. Ensure all components are securely attached before lowering the vehicle and removing the jack stands.
Remember to exercise caution when working with fuel systems, and always allow adequate ventilation to prevent the buildup of flammable fumes.
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Replacing the tank
To replace the midship fuel tank of a Ford F-150, you will need to first siphon the tank dry. Next, remove the filler neck and vent tube. Place a floor jack against a square of plywood under the tank, then remove the straps and lower the jack. When the straps are loose, lower the jack just enough to unhook everything from the tank.
If you are replacing the tank with a new one of the same size, you can simply reverse the above steps. However, if you are installing a larger tank, there are plenty of walkthroughs online to help you with the swap. You will also need to make a change in Forscan to complete the installation of a larger tank.
If your truck has a dual fuel tank setup and you want to remove one of the tanks, you can do so by simply installing a new tank assembly. You can purchase a tank with all the pumps inside for a reasonable price.
If you are removing the rear tank, you must join the two rear lines together. You can do this by breaking the tubes off of the fuel pump with pliers and capping the tubes with a rubber hose, a bolt, and hose clamps.
It is worth noting that removing one of the tanks in a dual fuel tank setup may cause the truck to become unbalanced, especially when the remaining tank is full.
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Removing the tank shroud
First, siphon the tank to empty it. Next, place a floor jack against a square of plywood under the tank. This will support the tank as you remove the straps. Then, remove the filler neck and vent tube. Once the straps are loose, you can lower the jack and unhook everything from the tank.
Some people have suggested that you do not need to remove the tank shroud before removing the tank. However, if you do need to remove the shroud, you may need to remove the exhaust first. This will depend on the make and model of your truck. For example, the exhaust can be removed on an 88 250, but not on an 89 F250 Gasser.
It is important to note that the process of removing the tank shroud may vary depending on the specific model of your F150 and the configuration of the fuel tank. Always refer to the manufacturer's instructions or seek advice from a qualified mechanic if you are unsure about any steps in the process.
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Frequently asked questions
First, siphon the tank dry. Then, remove the filler neck and vent tube. Next, use a 13mm wrench to loosen the bolt on top of the tank, and a 15mm wrench to loosen the nut. Place a floor jack against a square of plywood under the tank before removing the straps, then lower the jack. Finally, lower the tank and unhook everything from it.
No, you do not need to remove the tank bed to replace the midship fuel tank.
No, it is not necessary to remove the tank shroud before removing the midship fuel tank.
If you have only one tank, the electric fuel pump could quit at any time, leaving you stranded. If you have two tanks, you can simply switch to the other tank and carry on.
