Katerina Swanson
Protecting a new fuel tank on an MGB car is a straightforward process that can be done at home. It is important to ensure that the fuel tank is protected from rust and corrosion, and there are several methods to achieve this. Some common approaches include using a fuel stabilizer, applying anti-rust paint, and ensuring the tank is kept full to reduce condensation and the formation of rust. In addition, it is recommended to regularly replace fuel filters and drain and refill the tank with fresh fuel to maintain optimal performance and protect the fuel system.
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What You'll Learn
Use a fuel stabilizer to prevent corrosion
Fuel stabilizers are an effective way to prevent corrosion and maintain fuel quality in your MGB's tank, especially if the vehicle will be stored for extended periods. They are particularly useful if you don't use your car regularly or plan to store it for long periods, such as during the winter or when going on extended trips.
Fuel stabilizers are typically made from petroleum products and act as a protective layer for the fuel in your tank. They bond with gasoline to prevent evaporation and oxidation, inhibiting chemical reactions that can cause corrosion and the formation of sticky resins, varnish, and gums. This helps to ensure optimal engine performance and reduces the risk of engine damage. Additionally, fuel stabilizers help repel water and reduce evaporation, making them suitable for both gasoline and diesel fuel.
When choosing a fuel stabilizer, opt for a reputable manufacturer with positive reviews. Look for products that offer protection against gum and varnish buildup, corrosion, and phase separation in ethanol-blended fuels. Follow the directions on the bottle or user manual to determine the correct amount to add to your fuel tank. Typically, only a small amount is needed, such as a tablespoon or two for a lawnmower or chainsaw gas tank. Run the engine for a few minutes after adding the stabilizer to ensure it circulates throughout the fuel system.
It is important to note that fuel stabilizers are not miracle additives or a replacement for routine fuel treatments. They help slow the aging process of fuel and can preserve it for up to two years. However, newer fuel will always burn cleaner and easier, igniting better and leaving fewer deposits. Nonetheless, fuel stabilizers can help prevent performance issues and engine damage caused by stale or oxidized fuel.
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Coat the tank with anti-rust paint
The top of the fuel tank is particularly vulnerable to rust because water and mud tend to accumulate there. To protect your new MGB fuel tank from rust, you can coat it with anti-rust paint.
First, prepare the tank for painting by cleaning it thoroughly. Next, apply a primer to the tank. You can use a product like Restoleum Auto Primer, or a similar auto primer, and apply two coats to ensure the surface is properly prepared for the paint. Once the primer is dry, apply two coats of anti-rust paint. You can use a product like Hammerite black anti-rust paint, or a similar anti-rust paint in a colour of your choice. Make sure to follow the manufacturer's instructions for application and drying times.
In addition to anti-rust paint, you can also apply a product like Waxol or underseal to the top of the tank for extra protection. Some people also recommend using a product like POR15, which is a heavy-duty anti-corrosion coating, but this may be overkill for a fuel tank.
To prevent rust from forming on the inside of the tank, it is important to keep the tank full to reduce condensation and avoid long periods of disuse. You can also add a fuel stabilizer to the tank, such as Sta-Bil, which can help protect metal parts from corrosion.
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$44.99 $49.95
Use a galvanised or stainless steel tank
If you are looking to protect a new fuel tank on your MGB, one option is to use a galvanised or stainless steel tank. While most available tanks are not galvanised, opting for one may be a good idea if the price is comparable to that of a regular steel tank. You can paint a galvanised tank once you use a cleaner on the galvanised metal. First, use a "galvanised-metal primer", and then apply paint or bed-liner material on the top of the tank.
Stainless steel tanks are also available and offer a durable option, though they may be more expensive. One user reported that their stainless steel tank still looked new 30 years after installation. Another user mentioned that they had found a stainless steel tank for sale on eBay.
If you are worried about rust, it is worth noting that the top of the tank is the most vulnerable part as this is where dirt and crud get trapped. This leads to rust, as there is no airflow and no way to wash the top off. Therefore, it is important to protect the top of the tank with paint or another coating.
Before installing a new tank, it is also worth inspecting the old tank to identify the cause of any issues. For example, a bad filler hose, a bad gauge seal, or spray coming from the fuel pump hose could be causing leaks.
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Drain the tank with a hand pump
When it comes to protecting a new fuel tank on an MGB, there are several steps to take, and one of the first steps is to drain the tank. Draining the tank with a hand pump is a safe and effective method. Here is a detailed guide on how to do it:
Firstly, locate the fuel tank and identify the drainage plug or small bolt. Place a large pan, container, or receptacle underneath to catch the fuel. It is important to gauge how much fuel is in the tank beforehand and have enough containers ready to avoid overflow.
The next step is to start pumping. Use the hand pump to begin drawing the fuel out of the tank. Depending on the amount of fuel in the tank, you may need to pump for several minutes to completely empty it. It is important to be cautious and patient during this step to avoid spills or accidents.
As the tank empties, you will start to hear air bubbles, indicating that the tank is almost empty. Continue pumping until you are sure that all the fuel has been removed. It is crucial to ensure that the tank is entirely empty before moving on to the next steps of cleaning and preparing the tank for paint or other protective coatings.
Once the tank is drained, you can then proceed to remove the hard line connection, air vent connection, and any other necessary components. It is important to refer to your specific MGB model's instructions or seek advice from experienced MGB enthusiasts or mechanics to ensure you are taking the correct steps for your vehicle.
Additionally, if your fuel tank is being replaced due to issues with the fuel pump or fuel filter, it is essential to address those components as well. In some cases, you may need to seek a trained technician to perform certain repairs or replacements, especially if they are integrated with the fuel pump assembly.
Remember to take appropriate safety precautions when working with fuel and always dispose of the drained fuel responsibly.
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Check for leaks by filling the tank
When checking for leaks by filling the tank, it is important to take precautions to avoid any fuel leaks or spills. Here are some detailed steps to follow:
Firstly, ensure that you have drained the tank completely. This can be done by using a hand-operated pump, as mentioned by one MGB owner, or by removing the fuel line from the carbs and redirecting it into a gas container, as described by another. It is important to have control over the evacuation of the fuel to avoid any spills.
Next, once the tank is empty, you can begin inspecting for leaks. One method is to fill the tank with a small amount of kerosene and swill it around, then tip it into a vessel to inspect the colour and any contamination. If the kerosene appears clear, you can empty the tank and allow it to dry.
After ensuring the tank is clean and dry, you can begin the process of refilling. One owner recommends filling the tank to the extent that there is a little backup and overflow out of the fill neck. This will help clear any remaining residue from the top of the tank.
However, it is crucial to closely monitor the tank during this process. Inspect the tank for any signs of fuel leaks, such as fuel appearing on the ground below the exhaust pipe or a strong smell of gasoline. If leaks are detected, it is important to address them promptly to avoid safety hazards.
Additionally, pay attention to the fuel gauge reading during the filling process. Some tanks may not have an interior section or baffle, which can affect the accuracy of the fuel gauge. Ensure that you are filling the tank in a well-ventilated area to mitigate any potential risks associated with fuel vapours.
Finally, once the tank is filled, it is recommended to take the car for an extended drive and monitor for any further leaks or issues. It may be necessary to adjust or tighten any connections or fittings to ensure a secure seal and prevent leaks. Remember to always put your safety first when working with flammable liquids and follow appropriate safety protocols.
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Frequently asked questions
If you notice a fuel leak, this could be a sign that your tank is damaged and needs replacing. Other signs include sediment and blockage of the fuel filter, and rust.
First, drain the tank. Then, remove the fuel line, wires to the fuel level sending unit, and clips that hold the wires to the flange. Next, remove the fill connection and vent line. Finally, remove the bolts attaching the tank to the car.
Before installing the new tank, inspect it for any issues. Then, assemble the sending unit, ensuring it is in the correct orientation. Once the gasket and sending unit are in place, secure the locking ring with a screwdriver and hammer. Finally, bolt the new tank into the car.
To protect the outside of your new fuel tank, you can paint it with anti-rust paint and then apply underseal. To protect the inside of the tank, you can use a fuel stabilizer such as Sta-Bil, which protects against corrosion.
