Rajan Wilcox
Removing the fuel tank from an MGB car is a complex task that requires careful attention to safety. Before removing the tank, it is important to drain the fuel and fill the tank with water and soap to neutralise any flammable residue. The fuel tank should then be cleaned and inspected for rust, and any rust should be removed using a wire brush. It is also important to apply a sealing compound to the inside of the tank to protect against gasoline additives. This process can be dangerous, and it is recommended to refer to a manual for detailed instructions.
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What You'll Learn
- Safety precautions: Drain fuel, fill with soapy water, and be cautious of flammable lacquer and vapours
- Removing the tank: Takes around 20 minutes, use a trolley jack and 4x4
- Cleaning the tank: Use hot water and an etching solution to remove residue, then apply sealing compound
- Repainting: Use a wire brush to remove light surface rust, then paint with POR15
- Reinstallation: Use inexpensive gaskets to reinstall the tank
Safety precautions: Drain fuel, fill with soapy water, and be cautious of flammable lacquer and vapours
When removing an MGB fuel tank, there are several safety precautions that must be taken to prevent accidents, protect the environment, and comply with regulations. Here are the key steps to ensure safety:
Drain the Fuel Tank
Start by removing any remaining fuel from the tank. This is crucial to prevent spills and reduce the risk of fire during the removal process. Make sure to use the proper tools and procedures to safely drain the fuel and avoid any spills or leaks.
Fill with Soapy Water
Once the fuel tank is drained, fill it with soapy water. This step serves multiple purposes. Firstly, it helps to clean the inside of the tank, removing any fuel residue or contaminants. Secondly, soapy water is a safer alternative to fuel, especially when working with electrical connections. In the event of a spill, soapy water is less likely to cause a hazardous situation compared to flammable liquids.
Be Cautious of Flammable Lacquer and Vapours
Fuel tanks can contain flammable liquids and vapours, such as gasoline, diesel, or oil. These substances pose a significant risk of fire or explosion. Ensure adequate ventilation to prevent the buildup of flammable vapours and reduce the risk of ignition. Use non-sparking tools to avoid creating sparks that could ignite flammable vapours or liquids. Have a fire extinguisher nearby in case of any fires or sparks.
It is important to work in a well-ventilated area away from open flames, pilot lights, incandescent light bulbs, or any other potential sources of ignition. Additionally, wear safety gear such as gloves and safety glasses, and have cleanup materials ready in case of any spills or leaks.
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Removing the tank: Takes around 20 minutes, use a trolley jack and 4x4
Removing the fuel tank from an MGB car usually takes around 20 minutes. Before starting, ensure you have a trolley jack and a 4x4 to hand.
First, pump out or drain the fuel from the tank. Then, fill the tank with water and soap and let it sit for an hour. Drain the water and soap mixture, and then you can drop the tank. It is important to follow this "soap and water routine" as an empty tank is more dangerous than a full one.
Once the tank is dropped, you can begin to clean and repaint it. Use hot water to dilute the solution and slosh it inside the tank. Drain and repeat until all residue is removed. If rust flakes are present, a length of chain can be sloshed around inside the tank with the cleaner to loosen it.
After cleaning, the tank should be etched to provide a good surface for the sealer to adhere. Using an etching solution, plug all drains and pour the contents into the tank. Slosh it around to cover the entire inside of the tank and let it stand for 30 minutes.
Finally, apply the sealing compound. Plug all drains and pour the contents into the tank from the filler neck. Use a back and forth and twisting motion to coat all inside surfaces thoroughly until a thin film is present. Remove any drain plugs and allow the remaining sealer to drain back into the can.
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Cleaning the tank: Use hot water and an etching solution to remove residue, then apply sealing compound
To clean an MGB fuel tank, you will need to use hot water and an etching solution to remove residue, and then apply a sealing compound. First, drain all the fuel from the tank into an approved container or fuel caddy. Next, insert a hose into the fuel tank and begin pouring a stream of clean, hot water into it. While the water is filling the tank, spray a mild detergent inside. If the opening allows, use a brush to loosen debris from the sides of the tank.
Stop the stream of water and swish it around to ensure all debris has been captured. Then, dump the dirty water into a pan, being careful to capture any liquids. Wipe the tank with a lint-free washcloth. If there is any gum or shellac residue remaining, repeat the process until it is removed. For very gummy tanks, plug all outlets and allow the solution to sit in the tank, covering the worst areas, for 24 hours. If rust flakes or scale are present, a length of chain can be swished around inside the tank with the cleaner to loosen it.
After removing debris and residue, the tank should be etched to provide a good surface for the sealer to adhere. Using an etching solution, plug all drains and pour the entire contents into the tank. Slosh it around, covering the entire inside of the tank, and let it stand for thirty minutes. Then, rinse and dry the tank. If it needs a second wash, do it now. Otherwise, fill it with some gas mixed with motor oil and coat the inside. Drain it out and let it dry for a few days, checking for re-rusting.
Finally, apply the sealing compound. Following the directions on the can, plug all drains and pour the entire contents into the tank from the filler neck. Using a back-and-forth and twisting motion, coat all inside surfaces thoroughly until a thin film is present. Now remove any drain plugs and allow the remaining sealer to drain back into the can. Blow compressed air through the fuel outlet before the compound has a chance to dry and clog the fuel pickup.
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Repainting: Use a wire brush to remove light surface rust, then paint with POR15
Repainting a fuel tank can be a tricky task, but with the right tools and preparation, you can achieve a professional finish. In this case, the first step is to use a wire brush to remove light surface rust from the tank. This process will ensure the surface is ready for painting and will help the new paint adhere properly. It is crucial to be thorough during this step, as any remaining rust could affect the final finish and potentially cause issues down the line.
Once the surface rust has been removed, it is essential to prepare the metal surface. This can be done using a metal cleaner degreaser and a metal surface prep product. Ensuring the surface is thoroughly cleaned and prepared will help the paint adhere correctly and create a more durable finish. It is also recommended to use a product like Metal Prep from POR15 to enhance protection and paint adhesion further.
After the surface has been adequately prepared, it is time to apply the first coat of POR15 Rust Preventive Coating. This product is specifically designed to be painted directly onto prepped rusted or seasoned metal surfaces. It is crucial to follow the manufacturer's instructions during application, as improper preparation or application can cause the paint to peel. The humidity should be below 70% to avoid surface drying too quickly and causing bubbles in the finish.
Once the first coat is dry but still slightly tacky to the touch, it is time to apply the second coat. This timing ensures optimal chemical adhesion between the two coats. If the first coat has dried completely, it is necessary to scuff the surface gently with fine sandpaper for better adhesion of the second coat. After the second coat has been applied, consider applying a topcoat, especially if the painted surface will be exposed to direct sunlight or UV light, as POR15 is not UV resistant.
Finally, allow the paint to cure completely before reassembling any parts and refitting the fuel tank. The curing process typically takes a couple of days, and it is important not to rush this step to ensure a durable and long-lasting finish. Once cured, the fuel tank will be protected from rust and corrosion, thanks to the tough seal provided by the POR15 Rust Preventive Coating.
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Reinstallation: Use inexpensive gaskets to reinstall the tank
When reinstalling a fuel tank in an MGB, it is important to use inexpensive gaskets to ensure a secure and reliable fit. Gaskets are essential components that provide a tight seal between the fuel tank and the vehicle's fuel system, preventing leaks and ensuring proper fuel delivery. Here are some detailed instructions on how to use inexpensive gaskets to reinstall the fuel tank:
First, it is crucial to select the correct type and size of gaskets for your MGB model. Inexpensive fuel tank gaskets are readily available from automotive parts stores or online suppliers. Ensure you have the correct number of gaskets required for your MGB's fuel tank configuration.
Next, before beginning the reinstallation process, clean the mating surfaces of the fuel tank and the vehicle's chassis or mounting area. Use a suitable solvent or degreaser to remove any dirt, grease, or residue. This step ensures that the gaskets will adhere properly and creates a smooth surface for an effective seal.
Now, carefully position the new or refurbished fuel tank into place, ensuring proper alignment with the fuel pump, fuel lines, and any other components that were previously disconnected during removal. Refer to your MGB's repair manual or seek guidance from online resources or forums specific to your MGB model if needed.
With the fuel tank in position, place the gaskets strategically around the mating surfaces. Typically, a gasket is placed between the fuel tank and the chassis or mounting points to create a secure seal. Ensure the gaskets are seated correctly and do not obstruct any critical components or connections.
Finally, secure the fuel tank in place by tightening the bolts or fasteners according to the manufacturer's specifications or recommended torque settings. Be cautious not to over-tighten the bolts, as this can crush or damage the gaskets, compromising the seal.
Once the fuel tank is securely mounted, perform a thorough inspection of all connections, hoses, and lines to ensure they are properly attached and show no signs of leaks. Depending on your MGB's configuration, you may need to reconnect the fuel supply hose, vent lines, sending unit wires, and other components.
Always refer to safety guidelines and best practices when working with fuel systems, and ensure the work area is well-ventilated. It is recommended to have a qualified mechanic or MGB specialist inspect your work and perform a test drive to ensure the fuel tank and associated systems are functioning correctly.
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Frequently asked questions
Removing the fuel tank from an MGB can take around 20 minutes if the nuts are not frozen.
It is important to pump out or drain the gas from the tank. Then, fill the tank with water and soap, let it sit for an hour, and drain the water. This helps to ensure safety and reduce the risk of flammability or explosion.
A trolley jack and a 4x4 can be useful when removing the fuel tank. For cleaning, you may need hot water, a wire brush, and a sealing compound.
If there is rust or residue inside the fuel tank, you can use a wire brush to remove light surface rust. For more extensive rust or residue, you may need to consider replacing the tank with a new steel, aluminum, or stainless steel tank.
