Mercedes Mullins
Cleaning a diesel fuel tank is a necessary task to ensure the proper functioning of engines. While some suggest that cleaning a diesel fuel tank is unnecessary if there are no fuel problems, others recommend regular inspection and cleaning to prevent sediment build-up and engine issues. This article will explore the various methods and best practices for cleaning diesel fuel from plastic tanks, including the use of solvents, manual cleaning, and the importance of accessing the tank for effective cleaning.
Characteristics and Values Table
| Characteristics | Values |
|---|---|
| Cleaning agents | Clean diesel fuel, mineral spirits, acetone, alcohol |
| Cleaning tools | Manual sump pump, Vacula suction device, shop vac, power wash |
| Inspection tools | Inspection camera, poly tank inspection hatches |
| Other methods | Removing and replacing the tank, adding anti-bug chemicals, using a filter funnel |
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What You'll Learn
Using a small amount of diesel fuel to clean the plastic
If you're looking to clean a plastic diesel fuel tank, there are a few methods you can try. Firstly, it's important to inspect the tank for any debris or residue. This can be done by using an inspection camera or a strong flashlight to see inside the tank. If there is visible dirt or debris, it may be necessary to clean the tank.
One method is to use a small amount of clean diesel fuel as a solvent to wash the tank. Diesel fuel is a decent solvent and can effectively clean plastic surfaces. Simply pour a small amount of clean diesel fuel into the tank and use a brush or rag to scrub away any dirt or residue. You can then flush the tank with fresh diesel fuel to remove any remaining solvent.
If a stronger solvent is needed, mineral spirits or acetone can be used. These solvents will dissolve into any residual diesel in the tank. However, it's important to check if the tank is made of PVC before using acetone, as it can attack and damage this type of plastic.
Alternatively, you can try using a manual sump pump or a Vacula suction device to remove any liquids and debris from the tank. This method may require drilling a small hole in the tank to insert the hose and reach the bottom. After removing the remnants, be sure to add fresh, clean fuel and replace the fuel filters.
For a more thorough cleaning, some people choose to remove the tank and power wash it. This can be effective, but it's important to note that poly tanks may have irregular surfaces that don't adhere well to sealants. As always, be sure to add only enough clean fuel as you expect to use and replace the 'O' ring on the deck fill cap for a completely clean fuel system.
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Removing excess water and fuel contaminants
Inspecting the Fuel Tank:
Before initiating the cleaning process, it's crucial to inspect the fuel tank to identify the extent of contamination. Use a strong flashlight to look inside the tank and check for any debris, sludge, or sediment buildup. If the tank is accessible, you can also use a clean rag to wipe down the interior surfaces, absorbing any residual fuel or contaminants.
Draining and Flushing the Tank:
If the tank contains significant amounts of water or contaminants, it's advisable to drain and flush the tank. This can be done by disconnecting the tank and removing it from the engine or vehicle. Place the tank in a well-ventilated area and carefully drain the contents into an appropriate receptacle. You can then flush the tank with clean diesel fuel, which acts as a solvent to dissolve and remove contaminants. Alternatively, you can use mineral spirits or acetone for a stronger cleaning effect, but always check the compatibility with the plastic material of your tank before using these chemicals.
Cleaning with Water:
In some cases, water can be used as a cleaning agent. If you choose this method, ensure all electrical components are disconnected to avoid any damage. Rinse the tank with water, using a garden hose to reach all areas, including the bottom. You can also adapt a high-lift wet/dry vacuum to clean and dry the tank by reversing the suction process.
Removing Sludge and Sediment:
If there is visible sludge or sediment in the tank, use a cut milk carton or a similar makeshift scoop to remove as much of the solid material as possible. Deposit the sludge into a suitable container, such as a plastic pint glass or a jerry can. You can also use clean rags to wipe down the interior surfaces, absorbing and removing the sludge and sediment.
Drying the Tank:
After flushing or rinsing the tank, ensure it is thoroughly dried before refilling it with fuel. You can use compressed air or a vacuum to speed up the drying process and remove any remaining moisture.
Remember to always exercise caution when working with chemicals and fuels, and ensure proper ventilation during the cleaning process.
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Using mineral spirits or acetone for a deeper clean
If you are looking for a deeper clean of your plastic diesel fuel tank, mineral spirits or acetone can be used. However, before using acetone, check on the outside of the tank to see if it softens the plastic. It is recalled that it attacks PVC, so it is not recommended to be put inside a plastic tank.
To clean using mineral spirits, an experienced diesel mechanic recommends the following steps: run the tank almost out of fuel, fill it with 5 gallons of mineral spirits, drive it through as completely as possible, fill up the tank with fresh diesel, and enjoy the improved performance.
Another user suggests using biodiesel or mixing 2 gallons of clean vegetable oil with 5 gallons of diesel fuel in a can and then dumping it into your tank. This is a cheap and safe way to clean your fuel system.
Mineral spirits are a base stock for most additives, so it can be used as a solvent to help break up the diesel fuel. However, some people are hesitant to use mineral spirits, as it is fairly dry and could harm the system.
Acetone is a solvent that can be used to clean diesel fuel tanks, but it is important to note that it may not be suitable for all plastic tanks. Acetone is commercially produced worldwide and is an important compound in chemical industries.
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Power washing the plastic
Power washing is an effective way to clean plastic diesel fuel tanks. It is a good option if you are able to remove the tank, as it can be a messy job.
Firstly, you will need to drain the tank of any remaining diesel fuel. This can be done through a drain valve, if your tank has one, or by siphoning the fuel into a separate container. If you are unable to drain the tank completely, you can try using a cut milk carton as a scoop to remove as much fuel as possible.
Once the tank is empty, you can begin power washing. Use a hose with a high-pressure setting and blast the inside of the tank with water until it is clean. Be sure to wear protective gear, such as gloves and eye protection, to shield yourself from any diesel residue.
After power washing, allow the tank to air dry completely before refilling it with diesel fuel. You may also want to consider treating the tank with a solvent, such as diesel or mineral spirits, to ensure any remaining residue is removed.
If your tank does not have a drain valve, you may need to get creative to access the inside for cleaning. Some people have suggested cutting an access hole, but this should be done with caution as it may be difficult to seal the hole properly afterward. Another option is to try flushing and siphoning the tank with a garden hose or adapting a high-lift wet/dry vacuum to clean and dry the tank.
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Using a commercial additive to clean and stabilise fuel
Diesel fuel additives are a great way to clean and stabilise your fuel. They offer a host of benefits, such as optimising combustion, enhancing fuel efficiency, and cleaning specific components.
Before buying a fuel additive, ensure it is compatible with your vehicle. Here are some examples of common fuel additives:
- Cetane boosters improve combustion and power. Increasing the cetane number increases the diesel fuel's ignition quality, reducing emissions and improving engine operation.
- Fuel stabilisers stop the degradation of your fuel and protect engine components from rust, extending fuel longevity.
- Octane boosters are liquid additives that enhance a vehicle fuel's octane rating, aiding the fuel in withstanding higher pressures and temperatures, and potentially enhancing engine efficiency.
- Corrosion inhibitors prevent rust and corrosion of fuel system components, helping to expand the lifespan of fuel tanks, lines, and injectors.
- Fuel system cleaners clean and prevent deposits in different fuel system elements, including fuel injectors and combustion chambers, stopping components from getting clogged up.
- Lubricity additives are designed to enhance the lubricity of diesel fuel, therefore protecting fuel injectors and pumps from corrosion and wear.
- Anti-gel additives prevent diesel fuel from gelling in winter.
One example of a diesel fuel additive is Hot Shot's Secret Diesel Extreme, a fully-formulated, concentrated cleaner that removes all internal diesel injector deposits. It also contains a top-tier level of cetane booster, lubricity additive, and fuel stabiliser.
If you engage in regular maintenance, you can decrease the need for fuel additives. Actions like cleaning or replacing your fuel filters and checking the injectors could greatly help. Ensuring your fuel is stored properly can also reduce the chances of contamination and quality degradation, reducing the need for stabilisers.
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Frequently asked questions
You can clean a plastic diesel fuel tank by removing the tank and power washing it. You can also use a manual sump pump to clean it through a small hole. If you want to avoid cutting an access hole, you can try using a cut milk carton as a scoop to remove the sludge, periodically emptying it into a jerry can.
You can use clean diesel fuel, mineral spirits, or acetone to clean a plastic diesel fuel tank. However, before using acetone, check if it softens the plastic on the outside of the tank.
You can inspect the inside of the tank with a strong flashlight or an inspection camera to see if it is dirty. If you notice any debris, sediment, or sludge, you may want to clean the tank.
To prevent future fuel problems, you can use a filter funnel and add anti-bug chemicals whenever you fill up your tank. Regularly inspecting your tank and ensuring it is clean and free from sediment and sludge can also help prevent issues.
