Mercedes Mullins
Rust in fuel tanks can create a lot of problems. It can enter the fuel filters, causing drivability issues. The best way to fix this problem is to seal the rusty fuel tank. This involves cleaning the tank, removing rust, and coating the inside with a sealant. The KBS Auto Fuel Tank Sealer Kit is a popular choice for this purpose. It is designed to seal the inside of the tank entirely and can be used for different-sized fuel tanks. The first step is to remove built-up gum or varnish and loose rust. The tank is then cleaned using KBS Klean. Next, the metal is prepared to receive the Gold Standard Tank Sealer by using RustBlast, which neutralizes existing rust and leaves a zinc phosphate coating. Finally, the Gold Standard Tank Sealer is poured into the tank, which is then rotated to ensure even coverage.
Characteristics and Values Table for Sealing a Rusty Fuel Tank
| Characteristics | Values |
|---|---|
| Why seal a rusty fuel tank? | To prevent rust from causing costly repairs to carburetors, petcock, and/or fuel pump. |
| When to seal a fuel tank? | When there is noticeable rust and scale, especially during a repair. |
| How to seal a fuel tank? | 1. Clean the tank and remove existing rust. 2. Prepare the metal to receive the sealer by using an acid metal etch like RustBlast or phosphoric acid. 3. Coat the inside of the tank with a sealant like Gold Standard Tank Sealer, Red-Kote, or POR-15 fuel tank sealer kit. |
| Products to use | Gold Standard Tank Sealer, KBS Klean, RustBlast, Red-Kote, POR-15 fuel tank sealer kit, distilled white vinegar, kerosene, motor oil, two-stroke oil, epoxy, acetone, ethanol, KBS Coatings Tank Sealer Kits |
| Alternative solutions | Replacing the fuel tank, using a fuel pump, or leaving a half tank of E10 in the tank |
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What You'll Learn
Removing rust with vinegar
To seal a rusty fuel tank, you must first clean the tank and remove the existing rust. This can be done using a variety of methods and products, such as a fuel tank sealer kit, which typically includes the necessary materials for cleaning, rust removal, and sealing. One popular kit is the KBS Coatings kit, which uses KBS Klean to clean the tank. Another option is to use a phosphoric acid tank cleaner, such as the POR-15 fuel tank sealer kit, followed by sealing with the POR-15 sealer.
If you are looking for a more natural and inexpensive way to remove rust, vinegar can be an effective solution. Here is a step-by-step guide on how to remove rust with vinegar:
Step 1: Disassemble and Hose Down the Rusty Parts
Completely disassemble the rusty parts and hose them down to get rid of deposited dust, dirt, and loose scale. This step is crucial to ensure that the vinegar solution can effectively penetrate and remove the rust.
Step 2: Prepare the Vinegar Solution
For this method, you will need white vinegar and water. Mix equal parts of vinegar and water in a plastic container deep enough to fully submerge the rusty parts. You can adjust the soaking time depending on the severity of the rust. For light rust, soak for 20-30 minutes, and for heavier rust, soak for an hour or more.
Step 3: Soak the Rusty Parts
Fully submerge the rusty parts in the vinegar solution. You may need to weigh down the parts to ensure they stay submerged. Let the parts soak for the recommended time based on the severity of the rust.
Step 4: Scrub and Rinse
After soaking, use steel wool or sandpaper to scrub away any remaining rust. Rinse the parts with cold water to remove any residual vinegar and rust particles. Be sure to dry the parts thoroughly after rinsing to prevent flash rust.
Step 5: Neutralize and Protect
To neutralize the acidity of the vinegar and prevent future rust, you can use baking soda. Apply a paste made of baking soda and water to the parts and scrub with steel wool. Wipe everything down with a rag soaked in denatured alcohol to remove any remaining moisture. Finally, apply a light coat of oil, such as camellia oil, to protect the surface and prevent new rust from forming.
Once the rust has been removed and the metal is prepared, you can proceed to coat the inside of the fuel tank with a sealant. It is important to follow the specific instructions provided with your chosen sealant kit to ensure proper application and adhesion.
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Using a sealant kit
Sealing a rusty fuel tank with a sealant kit is a viable option to repair your fuel tank. It is important to follow the instructions provided with your kit carefully. Here is a general step-by-step guide on how to use a sealant kit to seal a rusty fuel tank:
Firstly, clean the tank. This involves removing any fuel, residue, gunk, and rust from the tank. You can use a pressure washer, a garden hose, or a product like Evaporust to clean the tank. It is important to ensure that the tank is free of all contaminants and structurally sound before proceeding.
Next, prepare the metal surface to receive the sealant. This step may vary depending on the kit you are using, but it typically involves using an acid metal etch or a similar product to neutralize any remaining rust, etch the metal, and create a coating for better adhesion of the sealant. For example, the KBS Tank Sealer Kit uses RustBlast, while the POR-15 Fuel Tank Sealer uses Metal Prep. Follow the instructions provided with your kit for this step.
Once the tank is prepared, it is time to apply the sealant. Pour the entire can of sealant into the tank and slowly rotate the tank so that the inside is thoroughly and evenly coated. Work the sealant around the inside of the tank for up to 30 minutes. Ensure that any remaining surface rust, leaky weld seams, and pinholes are sealed.
After the tank is coated, drain any excess sealant from the tank. It is important to avoid letting the sealant form puddles, as this can affect its ability to adhere to the metal. Leave the tank to air-dry in a well-ventilated area for at least 48 hours, or 96 hours for maximum cure.
Finally, inspect the tank. It should now be free of rust and have a protective coating that will prevent future rust.
It is important to note that some sealants may have specific instructions or requirements, such as the temperature of the tank and sealant, so always read and follow the instructions provided with your chosen sealant kit carefully.
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Preparing the metal to receive sealer
First, ensure the fuel tank is removed from the vehicle. This is necessary to access the tank and perform the cleaning and sealing process effectively. Once the tank is removed, use a product like KBS Klean or a similar cleaning agent to thoroughly clean the tank. This step involves removing any built-up gum, varnish, or loose, flaky rust from the interior of the tank. It is important to ensure that the tank is completely clean and free of any debris or residue.
Next, prepare the metal surface of the tank to receive the sealer. This is typically done using an acid metal etch product like RustBlast. Pour the RustBlast or a similar product into the dry tank at full strength. Rotate the tank every 5 minutes for at least 30 minutes to an hour. This process ensures that the entire interior surface of the tank is evenly coated with the acid metal etch. To further enhance the removal of rust, you can place a length of chain or nuts and bolts inside the tank during rotation. These objects will agitate the surface and help remove any stubborn rust particles.
After the etching process, thoroughly rinse the tank with water to remove any remaining residue. It is important to work quickly during this step to prevent the formation of "flash rust," which can occur if the moisture content in the air is high. A hair dryer or heat gun can be used to speed up the drying process, but use low heat settings and keep the dryer or gun moving to avoid damaging the paint.
At this stage, the metal surface of the fuel tank should be clean, dry, and prepared to receive the sealer. You can use a fuel-soluble sealer or a product specifically designed for sealing fuel tanks, such as Gold Standard Tank Sealer or Red-Kote.
Remember, achieving a rust-free and clear surface is crucial for the successful adhesion of the sealer. Take your time during each step and follow the specific instructions provided by the manufacturer of your chosen cleaning and sealing products.
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Sealing with Gold Standard Tank Sealer
Sealing a rusty fuel tank with Gold Standard Tank Sealer is a straightforward process, but it requires patience and careful adherence to the instructions. Here is a step-by-step guide:
Step 1: Clean the Fuel Tank
Before applying the Gold Standard Tank Sealer, it is essential to clean the fuel tank thoroughly. Start by removing the fuel tank cap and the petcock valve. Rinse the tank with water, capturing the remnant fuel, rust particles, and other debris. You can use a water hose for this step, ensuring that you rinse multiple times to remove all loose particles.
Step 2: Prepare the Metal Surface
Once the tank is clean and dry, it is time to prepare the metal surface to receive the sealer. This is done using KBS RustBlast, an acid metal etch product. Pour the RustBlast into the dry tank, ensuring it is full strength. Rotate the tank every 5 minutes for at least 30 minutes to an hour, so that all the inside surfaces of the tank are etched. This process neutralizes existing rust, creates an anchor pattern, and leaves a zinc phosphate coating to enhance the adhesion of the sealer.
Step 3: Rinse and Dry the Tank
After the etching process, it is crucial to drain and rinse the tank thoroughly with water several times to remove any residue. Ensure that you do not allow the RustBlast to dry on the surface, as this can affect the sealing process. Once the tank is thoroughly rinsed, it needs to be dried completely. You can use forced air from a shop vac, blow dryer, or a fan to accomplish this.
Step 4: Apply the Gold Standard Tank Sealer
Now, you are ready to apply the KBS Gold Standard Tank Sealer. Pour the entire can of sealer into the fuel tank. Slowly rotate the tank to ensure that the sealer thoroughly and evenly coats the inside. Continue this process for up to 30 minutes, ensuring that any remaining rust, weld seams, and pinholes are sealed. Remember, the sealer should be applied in a single thin coat.
Step 5: Drain Excess Sealer
After coating the tank, drain the remaining tank sealer thoroughly. Be careful not to let the excess sealer form puddles, as this can affect its ability to adhere to the metal. Ensure that you clean up any excess sealer before it dries, as it cannot be removed once cured.
By following these steps and allowing adequate time for each stage of the process, you can effectively seal a rusty fuel tank with Gold Standard Tank Sealer, restoring its functionality and protecting it from further corrosion.
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Preventing rust with kerosene or motor oil
Rust in fuel tanks can cause all kinds of problems. While some choose to replace the tank with a new one, this can be expensive and difficult, or even impossible, to find.
One way to prevent rust is by using kerosene or motor oil. Kerosene has been observed being mixed with rust preventive oil during packing in some manufacturing processes. However, this is not considered a good practice due to safety and health hazards, as well as its volatile nature.
A coating of oil can help prevent rust by inhibiting moisture from reaching the iron in the metal. Gun owners, for example, keep their firearms well-oiled even when not in use. This not only lubricates metal parts but also forms a protective barrier against rust.
Motor oil can also be used to lubricate and protect metal parts from rust. However, an oily surface might be problematic for some tools or machines and could pose environmental and human health concerns.
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Frequently asked questions
There are two ways to fix a rusty fuel tank. The first is to replace the tank with a new one, which can be expensive and hard to find. The second option is to seal the tank. To do this, clean the tank, remove the rust, and coat the inside with a sealant.
There are various products available on the market to seal a rusty fuel tank, including KBS Coatings' Auto Fuel Tank Sealer Kit, Red-Kote, POR-15, and Gold Standard Tank Sealer.
First, remove the fuel tank from the vehicle and clean it with a product such as KBS Klean or distilled white vinegar. Next, prepare the metal to receive the sealant by using an acid metal etch like RustBlast, which neutralizes rust and etches the metal. Finally, pour the tank sealer into the tank and rotate the tank to ensure even coverage.
Rust in a fuel tank can cause drivability issues, such as clogged fuel filters. You may also be able to see flaking rust inside the tank or notice that rust has made the tank wall thin.
After cleaning and sealing your fuel tank, you can prevent rust from returning by using a fuel-soluble sealer or coating the inside of the tank with a product such as motor oil or two-stroke oil.
