Rajan Wilcox
A dirty fuel tank can cause a host of problems, from fuel pump failures to engine issues, so it's important to know how to clean your plastic diesel fuel tank. While some recommend simply using clean diesel fuel to wash the tank, others suggest something stronger, like mineral spirits, acetone, or kerosene. However, it's important to exercise caution when using certain chemicals, as some can soften or melt plastic. Before cleaning, it's advisable to inspect the tank for any debris or damage.
Characteristics and Values Table for Cleaning a Plastic Diesel Fuel Tank
| Characteristics | Values |
|---|---|
| Frequency | Clean when necessary to maintain the health and performance of vehicles and machinery. |
| Inspection | Use a strong flashlight to see if the tank is dirty. |
| Materials | Clean diesel fuel, mineral spirits, acetone, muriatic acid, white vinegar, lemon juice, mild detergent, fuel line antifreeze/water remover |
| Tools | Inspection camera, shop vac, sump pump, hose, brush, lint-free washcloth, compressed air |
| Procedure | Drain tank, remove debris, rinse with water, spray detergent, swish water, dump dirty water, wipe tank, dry tank, inspect for damage, repair or replace tank if needed, add fuel line antifreeze/water remover |
| Precautions | Avoid using lacquer thinner, acetone, or battery acid as they can soften or melt plastic. Do not cut an access hole as it cannot be sealed back up. |
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What You'll Learn
Inspecting for debris and sludge
Firstly, it is crucial to visually inspect the tank for any signs of debris or sludge buildup. This can be done by simply looking inside the tank with a strong flashlight. If the tank is still attached to the vehicle, you may need to use an inspection camera or a "see snake" to get a clear view of the interior. If the tank is removable, consider taking it off and hanging it from a secure structure, such as a tree, to get a better view of the inside.
If the tank has a smooth exterior and no visible access points, you may need to create an inspection hatch. This can be done by cutting a small hole, approximately 5 inches in diameter, in the top of the tank. Make sure to use the appropriate tools, such as a stainless steel jigsaw, and seal the hole properly after installation to prevent leaks. This access hatch will provide a clear view of the interior and allow for easier cleaning.
Once you have a clear view of the inside of the tank, carefully inspect all surfaces for any signs of debris, sludge, or carbon deposits. Pay close attention to the baffles, fuel lines, and the fuel feed pipe, as these areas are prone to sludge buildup. If you notice any significant buildup, use a plastic flyswatter wrapped in a rag to reach and remove the sludge. Alternatively, you can use a cut milk carton as a scoop to remove large amounts of sludge before cleaning.
If the tank is removable, consider taking it off and power washing it to dislodge any stubborn debris or sludge. You can also try shaking the tank with gravel inside to dislodge any stubborn particles. However, always be cautious and wear the appropriate protective gear when handling the tank to avoid any accidents.
Finally, after removing large pieces of debris and sludge, inspect the tank for any signs of damage, rust, or corrosion. This step is crucial, as any damage to the tank may require repair or replacement. Carefully examine the interior and exterior surfaces for any cracks, leaks, or signs of degradation. If you notice any issues, make sure to address them before refilling the tank with fuel.
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Using solvents and detergents
When cleaning a plastic diesel fuel tank, there are several methods that can be employed, depending on the level of dirt and debris present. It is important to first drain the tank of any fuel and, if possible, remove the tank to ensure easy access for cleaning.
One method is to use a solvent such as diesel fuel, mineral spirits, or acetone, which can dissolve any residual diesel and contaminants in the tank. Before using acetone, check if it softens the plastic by applying a small amount to the outside of the tank. It is important to note that acetone can attack PVC, so it should not be used if the tank is made of this material. Another option is to use a commercial fuel system cleaner, such as Rust Remover by Evapo-Rust, Fuel System Cleaner by Star Tron, or Fuel Tank Cleaner by Red Line.
Detergents can also be used to clean plastic diesel fuel tanks. A mild detergent can be sprayed into the tank while it is being filled with clean, hot water. A brush can then be used to loosen any debris from the sides of the tank. The water is then swirled to capture any remaining debris, and the tank is wiped with a lint-free washcloth.
For more stubborn debris, a stronger detergent or toilet bowl cleaner can be used, followed by hosing the tank down with water and allowing it to air dry. Alternatively, salt and ice cubes can be added to the detergent, creating an abrasive mixture that can effectively clean the tank. This mixture will eventually dissolve in water, making it easy to rinse away.
In addition to solvents and detergents, other substances can be used to clean plastic diesel fuel tanks. Lemon juice, for example, can effectively remove fuel residue without damaging plastic. Boiling parts in lemon juice can even remove stubborn residue that commercial carb cleaners cannot. Vinegar can also be used in a similar manner, and small chains or aquarium gravel can be added to help dislodge and remove debris.
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Flushing and siphoning
One user recommends flushing the tank by inserting a hose into the fuel tank and pouring a stream of clean, hot water into it. While the tank is being filled with water, spray a mild detergent inside. If the opening allows, use a brush to loosen debris from the sides of the tank. Once the tank is filled with water and detergent, stop the stream of water and swish the mixture around to capture all the debris. Finally, dump the dirty water into a pan, ensuring that all liquids are captured, and wipe the tank with a lint-free washcloth.
Another user suggests siphoning the tank by using a garden hose to flush out the contents. If a garden hose can reach the bottom of the tank, it can effectively siphon out most of the contents. This method can be combined with rinsing the tank with water and using a high-lift wet/dry vacuum to clean and dry the tank.
It is important to note that some users advise against cutting access holes in plastic diesel fuel tanks as they may not be properly sealed afterward. However, some users have successfully cleaned their tanks by cutting holes and using tools such as a plastic flyswatter wrapped in a rag to reach the interior of the tank.
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Cleaning without water
If you are looking to clean your plastic diesel fuel tank without water, there are a few methods you can try.
Firstly, you can try using a solvent such as diesel, old gas, mineral spirits, or acetone. These solvents will dissolve any residual diesel and contaminants in the tank. However, before using acetone, check if it softens the plastic on the outside of the tank, as it can attack PVC. If you are worried about using chemicals, you can simply use clean diesel fuel as a solvent, as it is a decent option on its own.
Another method is to use a suction device to remove the contaminants and sludge from the tank. You can try using a manual sump pump, a Vacula suction device, or even a simple garden hose to suck out the remnants from the bottom of the tank.
Additionally, you can try using a high-pressure washer or power washer to clean the tank without water. This method can be effective, but be prepared to get wet! If you are worried about the mess, you can go to a car wash to use their facilities.
Finally, you can try using natural cleaning agents such as pure lemon juice or white vinegar. These acidic substances are effective at eating up fuel residue and will not harm plastic.
Remember to always exercise caution when handling chemicals and cleaning agents, and ensure the tank is completely empty before attempting any cleaning methods.
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Drying and inspecting
Once you have completed the cleaning process, it is important to dry and inspect your plastic diesel fuel tank thoroughly before using it again.
Firstly, dry the fuel tank completely with compressed air. If you do not have access to compressed air, you can try using a high-lift wet/dry vacuum to dry the tank. Remember to reverse the vacuum to dry the tank. You can also try using a water hose to wash out the tank, but be sure to wash it out thoroughly.
Next, inspect the tank for any signs of damage or debris. You can use a strong flashlight to look inside the tank and check for any dirt, debris, or damage. If you are unable to see inside the tank clearly, you may need to cut an access hole. This can be done by marking the places on the top of the tank where the hatches should be fitted and drilling a hole to start. Be aware that cutting an access hole may affect the seal of the tank. If you do not want to cut an access hole, you can try using an inspection camera or a "see snake" to inspect the inside of the tank for any potential faults.
If you notice any rust or physical damage to the tank, it must be repaired or replaced. You can also add fuel line antifreeze or a water remover to help absorb any residual moisture. After drying and inspecting the tank, let it sit for at least 30 minutes before using it again.
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Frequently asked questions
First, drain all the fuel from the tank. Then, use a brush to clean the area from which the fuel pump will be removed. Remove the fuel pump, being careful not to let any residual debris fall into the tank. Insert a hose into the tank and pour in a stream of clean, hot water. 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. Stop the stream of water and swish the water around to ensure all debris has been captured. Dump the dirty water into a pan. Wipe the tank with a lint-free washcloth and dry it with compressed air. Finally, inspect the tank for damage and, if necessary, repair or replace it.
Some recommend using clean diesel fuel, mineral spirits, or acetone to clean a plastic diesel fuel tank. Others suggest using white vinegar, lemon juice, or TSP (Tri-Sodium Phosphate).
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A dirty fuel tank can lead to fuel pump failures. If your engine is making dying clunks as it grinds to a halt, this could be a sign that your plastic diesel fuel tank needs cleaning.
Over time, impurities and contaminants can accumulate in the fuel tank, affecting the engine's efficiency and longevity. This can lead to a host of problems, including reduced fuel flow due to build-up and fuel pump failure.
