Mercedes Mullins
Cleaning diesel fuel out of a gas tank can be a challenging task. The process may vary depending on the severity of the contamination and the specific type of fuel tank involved. Common causes of diesel contamination include water separation, bacterial growth, and sediment buildup, resulting in issues such as clogged fuel lines and reduced engine performance. To effectively clean a diesel fuel tank, one might consider using commercial products like Clear-Diesel Fuel & Tank Cleaner, or employing methods such as pumping out the fuel, pressure washing, or utilising solvents like MEK (methyl ethyl ketone). Preventative measures, such as using filter funnels and adding anti-bug chemicals, can also minimise the need for extensive cleaning.
How to clean diesel fuel out of a gas tank
| Characteristics | Values |
|---|---|
| Common reasons | Blockage in the fuel system caused by sediment in the fuel or diesel bug clogging the fuel line |
| Minimizing risks | Use a filter funnel and add anti-bug chemicals when filling up the tank |
| Cleaning methods | Siphoning, pressure washing with hot water and soap, using solvents like MEK (methyl ethyl ketone), Clear-Diesel Fuel & Tank Cleaner, or gas line deicer |
| Additional tips | Create access hatches for better inspection and cleaning, use river gravel and fresh fuel, shake the tank |
| Post-cleaning | Dry the tank, replace fuel filters, fill with fresh diesel |
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What You'll Learn
Use a filter funnel and add anti-bug chemicals to your tank
Using a filter funnel and adding anti-bug chemicals to your tank is a highly effective way to prevent diesel bug and sediment from clogging your fuel line. This method is a precautionary measure, minimising the risk of blockages in your fuel system.
The filter funnel is a self-cleaning tool that can be used on all fuels. It separates contamination from the fuel, ensuring that only clean fuel enters your tank. When refuelling, you can test for contamination by observing the presence of water or foreign substances in the funnel. If contamination is detected, it is advisable to slow down the refuelling process and use the funnel throughout.
Additionally, adding anti-bug chemicals to your tank whenever you fill it up can help prevent diesel bugs from clogging your fuel line. These chemicals act as a deterrent, keeping your fuel system clear of blockages caused by diesel bugs.
By combining the use of a filter funnel and anti-bug chemicals, you can effectively minimise the chances of fuel-related issues and maintain the optimal performance of your engine. This proactive approach ensures that your fuel system remains clean and free-flowing, reducing the likelihood of unexpected breakdowns or engine problems due to contaminated fuel.
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Siphon the tank to get rid of gunk and sediment
If you're dealing with a contaminated diesel fuel tank, one of the first steps is to siphon the tank to remove built-up gunk, sediment, and sludge. This process involves manually removing the fuel and gunk from the tank, ensuring that you get a thorough clean and reach all the corners of the tank.
Before you begin siphoning, it's important to drain the tank as much as possible. Open the drain hole and let the diesel fuel flow out into a suitable container. Once most of the fuel is drained, you can start the siphoning process.
Use a siphon pump to manually remove the remaining fuel and gunk from the tank. This process may require multiple repetitions to ensure you're getting rid of as much sediment as possible. Be cautious when handling the diesel fuel and ensure you are wearing appropriate protective gear, including gloves and eye protection.
Siphoning allows you to reach the bottom and corners of the tank, where gunk and sediment tend to accumulate. This thorough cleaning method ensures that you're not just skimming the surface but actually removing the built-up contaminants.
Additionally, consider using a filter funnel and adding anti-bug chemicals to the tank whenever you fill it up. This will help minimise the risk of future blockages and keep your fuel system in optimal condition.
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Use a cleaning solvent to cut the diesel
Using a cleaning solvent is an effective way to cut diesel from a gas tank. This method is particularly useful when dealing with stubborn gunk, varnish, and sludge that accumulates at the bottom of the tank.
There are various solvents available, each with its own advantages and considerations. Here are some commonly used solvents and the steps to use them effectively:
MEK (Methyl Ethyl Ketone)
MEK is a powerful solvent often used by heavy equipment operators to dissolve tough sludge and residue. It is available at home improvement stores like Home Depot or Lowe's. MEK is less volatile than acetone, making it a safer option. When using MEK, it is important to clean the entire fuel system, including the pickup tube, float, hard lines between the tank and engine, and all fuel filters.
Lacquer Thinner
Lacquer thinner is effective in dissolving residue, but it can be expensive and evaporates quickly. It is crucial to seal all openings when using this solvent. Additionally, lacquer thinner can affect plastic components, making it more suitable for metal tanks.
Acetone
Acetone is a strong solvent that can melt residue. However, similar to lacquer thinner, it is expensive and highly volatile, requiring careful sealing of the tank during use.
Carb Cleaner
Carb cleaner is a versatile solvent that can be used on both plastic and metal fuel tanks. It is important to test it first in a small area to ensure it doesn't affect the finish. Carb cleaner may leave a small residue to protect carb parts, which is something to be aware of.
Seafoam
Seafoam is a mixture of ethanol, naphtha, gasoline, and other petroleum distillates. It is a reasonably benign option for plastic fuel tanks. To use Seafoam, mix it with fresh E10 and a stabilizer like Sta-Bil. Shake the tank frequently to ensure the solution covers all interior surfaces. Allow it to sit for a few days before draining and rinsing.
Fuel Tank Treatments
These are mixtures of cleansers, stabilizers, lubricants, and performance boosters. They are designed to be poured into the gas tank to help the engine run smoothly and preserve fuel quality during storage. Fuel tank treatments can include detergents and solvents to eliminate carbon deposits, varnish, and contaminants from the fuel system.
When using any of these solvents, always follow safety precautions and instructions on the product labels. It is important to work in a well-ventilated area and wear appropriate protective gear, including gloves and eye protection. Additionally, ensure that the tank is thoroughly rinsed and dried after cleaning to prevent any residual solvent from contaminating the fresh fuel.
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Use a pressure washer with hot water and soap
If you're dealing with a contaminated diesel fuel tank, the first step is to drain the tank entirely. Once it's empty, you can begin the process of cleaning it. One effective method is to use a pressure washer with hot water and soap.
First, ensure that you are wearing appropriate protective gear, including gloves and eye protection. You don't want to risk getting any diesel fuel or cleaning chemicals on your skin or in your eyes. It is also important to work in a well-ventilated area to avoid inhaling fumes.
Next, if your pressure washer has different nozzle settings, choose a wide spray pattern. This will ensure that the water pressure is distributed over a larger area, reducing the risk of damaging the tank. Start by rinsing the tank with plain hot water to loosen any built-up residue. Use a gentle stream and avoid pointing the spray directly at seals or other sensitive components.
Now, you can add soap to your pressure washer. Choose a heavy-duty detergent designed for use with pressure washers, following the manufacturer's instructions for mixing it with water. Start applying the soapy water to the inside of the tank, working systematically to ensure you cover all surfaces. The soap will help to break down any remaining diesel fuel and contaminants.
Once you've applied the soapy water, let it sit for a few minutes. This will give the detergent time to work effectively and loosen any remaining residue. Then, switch back to plain hot water and thoroughly rinse the tank, ensuring that all soap residue is removed.
Finally, dry the tank thoroughly before refilling it with fuel. You can use a wet/dry vacuum to remove any standing water, and consider using a hot air gun or leaving the tank in direct sunlight to speed up the drying process.
This method of using a pressure washer with hot water and soap is an effective way to clean your diesel fuel tank. Just remember to take appropriate safety precautions and thoroughly dry the tank before refilling it with fuel.
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Use a solvent like MEK (methyl ethyl ketone) to clean the tank
To clean diesel fuel out of a gas tank, you can use a solvent like MEK (methyl ethyl ketone). MEK is a strong solvent that can effectively clean old car parts and dissolve and strip out old failing tank liners.
However, it is important to note that MEK is toxic and should be handled with caution. It can be easily absorbed through the skin and can cause irritation or an allergic reaction. When using MEK, it is recommended to wear a full mask, gloves, and a proper respirator to protect yourself from the fumes. It is also advisable to use it outdoors if possible.
To clean the gas tank using MEK, follow these steps:
- Empty all fuel from the tank.
- Remove the sending unit, float, feed lines, filters, and any other components that could be clogged by the coating.
- Remove any loose rust by tapping on the tank with a rubber mallet or by tumbling with a piece of chain inside the tank. Flush out any debris.
- Clean the tank by steaming it for about 15 minutes. Avoid boiling as it can remove the tin from the terne plate.
- Ensure that the tank is completely dry before proceeding. This is crucial to avoid any issues during the coating process. Drying can take up to 12 hours without a blower, but using a blower can reduce the time to about an hour.
- Once the tank is dry, pour 1 pint of MEK into the tank, slosh it around thoroughly, and then pour it out. The MEK will help dissolve any remaining residue and contaminants.
- After cleaning, make sure to rinse the tank with a solvent like menthol hydrate to remove any MEK residue.
- Reassemble and install the tank on the vehicle.
It is important to follow safety precautions when working with MEK and other solvents. Always work in a well-ventilated area, wear protective gear, and refer to the product's Material Safety Data Sheet (MSDS) for specific handling and storage instructions.
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Frequently asked questions
To clean a diesel fuel tank, first, drain the tank and look inside with a flashlight. Then, spray down the inside with a garden sprayer and use a cleaning solvent to cut the diesel. Let the tank air dry in the sun.
To clean the diesel fuel out of your gas tank, first, drain the entire contents of the tank into a can. Then, spray down the inside of the tank with a garden sprayer and use a cleaning solvent to cut the diesel. Let the tank air dry in the sun. Finally, fill the tank with fresh fuel.
You can use products such as Clear-Diesel Fuel & Tank Cleaner, Bio Kleen Diesel Fuel Biocide, or MEK (methyl ethyl ketone) to clean your diesel fuel tank.
To prevent your diesel fuel tank from getting contaminated, use a filter funnel and add anti-bug chemicals whenever you fill up your tank. You can also use a product like Clear-Diesel Fuel & Tank Cleaner to maintain a clean fuel tank and stabilize fuel for long-term storage.
