Mercedes Mullins
Dropping a fuel tank is a potentially dangerous task that should be approached with caution. It is important to ensure that the tank is not completely full before attempting to remove it, as a full tank is extremely heavy and difficult to handle. In addition, gasoline is highly flammable, and the risk of ignition should not be underestimated. Before beginning the process of dropping a fuel tank, it is advisable to siphon the fuel into a separate container or use a pump to empty the tank. Once the tank is empty, the next step is to remove the straps, filler tube, and shield, followed by the hoses and electrical connections. A jack can be used to support the tank and prevent it from dropping to the ground.
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What You'll Learn
Safety precautions when dropping a fuel tank
Before you begin the process of dropping a fuel tank, there are several safety precautions you should take to ensure your safety and the safety of those around you. Here are some detailed, direct, and instructive guidelines to follow:
Park your vehicle on a flat, hard, and level surface, preferably a concrete driveway, as asphalt can be damaged by fuel spills. If no other option is available, compacted soil is also acceptable. Ensure that you have the necessary tools and equipment for the task, including wrenches, screwdrivers, a jack, jack stands, a pump for removing fuel, fuel-rated containers, rags, and a fire extinguisher.
Remove any fuel from the vehicle using a fluid pump and container. The more fuel you remove, the lighter and easier the tank will be to handle. Have a fire extinguisher close by in case of any spills or accidents. It is also important to keep absorbent pads nearby to wipe up any drips or spills immediately.
Locate the fuel tank under the vehicle. If it is a modern car, the tank will likely be a plastic reservoir with hoses attached. Remove the straps holding the fuel tank in place, and then slowly and gradually lower the fuel tank. Do not lower it too fast or too much, as this can break a fuel line or pull wiring from the connectors.
Once you have accessed the lines and electrical connectors at the top of the tank, disconnect them carefully. Press on the connector release clips and pull them from the tank. For the fuel lines, some can be removed by pulling the line apart, while others may require a specialized tool to separate "quick disconnect" fittings. Consult your vehicle's service manual for specific instructions.
Throughout the process, it is crucial to protect yourself from contact with gasoline and avoid breathing in fumes. Ensure the area is well-ventilated, and if possible, get assistance with the project.
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Removing the fuel
First, it is essential to understand the risks associated with fuel removal. As one person shared, their friend suffered severe injuries when the fuel tank or the drained fuel ignited due to static electricity. Therefore, always take necessary precautions and perform fuel-related tasks in a well-ventilated area or outdoors to minimise the risk of fire and explosion.
Before starting the fuel removal process, ensure you have the necessary tools and equipment. Some common tools used for fuel removal include a hand-operated crank-style pump, a marine pump, a fuel-capable manual pump, or a drill-operated pump. These pumps are used to siphon the fuel from the tank into appropriate containers, such as 5-gallon cans. Additionally, you may require tools like a jack, a wrench, a pry bar, and a hose.
Now, let's move on to the step-by-step process of removing the fuel:
- Start by locating the fuel tank and ensuring it is accessible. Some vehicles have access holes or hatches underneath the seats or near the wheel wells, making it easier to reach the fuel pump, sender, and fuel lines.
- Disconnect the filler tube, hoses, and electrical connections leading to the fuel tank. This step is crucial to prevent damage to these components when the tank is removed.
- Position a jack under the tank to support it and prevent it from dropping to the ground. This step is especially important for heavy, full fuel tanks.
- Use a pry bar to gently pry the tank away from the frame. The coated paper on top of the tank can sometimes bond it to the frame, so you may need to apply some force to loosen it.
- With the tank slightly tilted or moved, you can now access the fuel lines and connections. Disconnect the fuel lines and begin siphoning the fuel using your chosen pump. Ensure you are siphoning into approved containers.
- Continue siphoning the fuel until the tank is empty or reaches the desired fuel level. Depending on the pump and the amount of fuel, this process can take time, so patience is essential.
- Once the fuel removal is complete, you can proceed with dropping or replacing the fuel tank, following the appropriate safety procedures.
Remember, always prioritise safety when working with fuel. Ensure proper ventilation, avoid open flames or sparks, and have a fire extinguisher nearby in case of emergencies.
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Tools to help drop a fuel tank
Dropping a fuel tank can be a challenging task, and it is important to have the right tools to do so safely and effectively. The tools required will vary depending on the vehicle and the specifics of the job, but here is a list of some of the most common and essential tools to help with the process:
First and foremost, safety should be a priority. It is recommended to work outdoors when dropping a fuel tank to minimise the risk of fire. Keep a fire extinguisher nearby in case of any emergencies. It is also advised to wear protective gear, such as gloves and eye protection, to shield yourself from any fuel spills or debris.
To disconnect the fuel lines from the fuel tank, you may need a specialised tool called a spring release tool or a similar device to separate the "quick disconnect" fittings. This will depend on the type of fuel line in your vehicle. Consult your vehicle's service manual for specific instructions.
A transmission jack, also known as a tranny jack, is commonly used to lower and support the fuel tank during removal. This tool helps to slowly and carefully lower the tank, either to the ground or to a position where repairs or services can be performed.
To remove strap bolts, you will typically need an open-end wrench. The size of the wrench will depend on the specific bolt, but common sizes include 1⁄2 or 9⁄16 inch (1.3 or 1.4 cm) or 12, 13, or 14 mm.
Other useful items include jack stands to provide additional stability, a pump for removing fuel, fuel-rated containers for capturing and storing the removed fuel, and rags for wiping and cleaning.
It is always important to refer to your vehicle's manual and seek professional advice if you are unsure about any steps or tools required to drop a fuel tank.
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Removing straps and filler tube
To remove the straps and filler tube, start by removing all the straps. Some long van tanks have up to three straps. Next, place a jack under the tank, a few inches away, to prevent it from dropping to the ground. You can use a transmission jack, a floor jack, or a tranny jack.
Now, you need to remove the filler tube and the shield to allow the tank to be tilted down at the front and pulled forward. You may need to use a pry bar to gently pry the tank away from the frame, as the coating on top of the tank can sometimes bond it to the frame.
Additionally, remember to remove the hoses and electrical connections before lowering the tank completely, or they may be damaged. This process will enable you to access the fuel lines and make the necessary repairs or replacements.
It is important to note that working with fuel tanks can be dangerous, so always take the necessary precautions and consider working in a well-ventilated area or outdoors to avoid the risk of ignition.
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Disconnecting the sending unit and fuel lines
Firstly, ensure the vehicle is parked on a level surface and engage the parking brake. Place a suitable jack under the vehicle to provide support and stability. The jack should be positioned securely to bear the weight of the vehicle and the fuel tank.
Next, locate the fuel tank and identify the sending unit and fuel lines. The sending unit is typically located near the fuel pump, and the fuel lines will run from the tank to the engine. You may need to refer to your vehicle's repair manual for specific locations and component identification.
Once you have identified the sending unit and fuel lines, proceed to carefully disconnect them. Start by loosening any clamps or couplings securing the fuel lines to the tank and the sending unit. Use appropriate tools, such as wrenches or line disconnectors, to avoid damage. Be cautious, as the fuel lines may still contain fuel, and it is essential to catch any spillage with a suitable container.
After loosening the clamps, carefully detach the fuel lines from the sending unit and the fuel tank. Again, be cautious and use rags or towels to catch any residual fuel that may spill. Once the fuel lines are disconnected, securely cap or plug the openings to prevent any fuel leakage and avoid introducing contaminants into the fuel system.
Now, focus on the sending unit. It is typically secured to the fuel tank with bolts or screws. Carefully remove these fasteners, ensuring that you do not drop them into the tank or misplace them. With the fasteners removed, gently detach the sending unit from the fuel tank, being mindful of any electrical connections that may be attached to the unit.
Finally, properly dispose of any fuel that was spilled or drained during the process, according to local regulations and environmental guidelines. Ensure that all disconnected components are labelled or organized for easy reassembly or replacement.
Remember, working on fuel systems can be dangerous, and it is always recommended to have professional expertise or seek guidance from a certified mechanic if you are unsure about any steps. Safety should be the top priority when undertaking such tasks.
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Frequently asked questions
Knocking on the side of the tank with a wrench will produce a different sound depending on whether the tank is full or empty.
You will need to remove the tank straps, filler tube, hoses, electrical connections, and shield. A jack is also useful to keep the tank from dropping to the ground and to support the tank as it sticks to the bottom of the supports.
Siphoning the tank is a common method, but it can be difficult to do with lung power alone. A fuel-capable manual pump is recommended, especially for gasoline, as it is more volatile than diesel.
Yes, it is important to work outside when disconnecting the lines and spout as there is a risk of ignition.
