Regan Brown
Sediment buildup in fuel tanks is a common issue faced by vehicle owners. While it is not normal to have sediment in all tanks, it can be caused by several factors, such as rust, old gas, or even wasp nests. In multi-partitioned fuel tanks, the process of removing sediment can be more complex due to the presence of multiple compartments. Various methods can be employed to address this issue, including using a `fuel polishing` system, employing a submersible pump, or utilising a pressure washer to clean the inside of the tank. Additionally, preventative measures, such as using a pre-filter or adding a bottle of Stabil, can help mitigate sediment buildup over time.
How to remove sediment from multi-partitioned fuel tanks
| Characteristics | Values |
|---|---|
| Prevention | Regularly use additives such as Cataclean, Chevron's Techron Complete, or Stabil |
| Prevention | Regularly change the fuel filter |
| Prevention | Use a pre-filter |
| Prevention | Use a fuel polishing system |
| Cleaning | Use a submersible pump to transfer the fuel to another container |
| Cleaning | Mop up the remaining sludge with paper towels |
| Cleaning | Use a wet and dry vacuum cleaner |
| Cleaning | Drain the tank and use a pressure washer |
| Cleaning | Use a vortex suction funnel |
| Cleaning | Use a suction truck/environmental cleaning company |
| Cleaning | Use a garden hose with high pressure |
| Cleaning | Use bacteriacide |
| Cleaning | Use a chain and acetone to clean the tank |
| Cleaning | Use a liquid acrylic gas tank liner |
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What You'll Learn
Using a pre-filter
To use a pre-filter, first, drain the fuel tank in situ. This can be done by placing a fuel-catching container under the tank and unscrewing the fuel line nut or hose at the base of the tank. Once the tank is drained, use an extraction pump to remove any remaining fuel and sediment settled at the base.
Next, insert the pre-filter. This can be done by cutting an access hole in the top of the tank or by removing the fuel cap and inserting the filter through the filler pipe. Ensure that the filter is secured in place to prevent it from flopping around.
Once the pre-filter is in place, refill the tank with clean fuel. It is recommended to use a diesel fuel tank cleaner or a biocide like Startron to eliminate any remaining contaminants.
Finally, replace the fuel cap and start the engine. Bleed the fuel system to ensure that any air pockets are removed. Refer to your vehicle's owner's manual for specific instructions on bleeding the fuel system.
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Cleaning with a pressure washer
Cleaning a fuel tank with a pressure washer is a viable option when the tank does not need to be removed. This method is cost-effective and time-saving, as it does not involve the labour-intensive process of physically removing the tank.
Firstly, it is important to disconnect the fuel lines to ensure that water does not travel into the fuel system and reach the engine. Next, drain the tank by suctioning out the fuel or turning it upside down over a container. If the tank is still attached, you may need to poke the pressure washer nozzle down the filler pipe and suck out the contents with a wet and dry vacuum. If the tank has been removed, you will have more space to clean it and can use a regular garden hose and sprayer if you do not have access to a pressure washer.
When using a pressure washer or hose, set it to a high-pressure setting and spray the inside of the tank. You may need to point the sprayer at different angles to remove light rust and sediment buildup. If there is substantial rust or grime, you may need to use a commercial cleaning solution to chemically break it down. After using a cleaning solution, rinse the tank with water again to ensure no residue remains.
Once you have finished cleaning the tank, it is important to leave it to dry completely. Turn the tank upside down if possible to aid the draining process. Sit the tank out for 24-48 hours, ensuring it is not in a moist or humid location. If there is still a smell of gasoline, this indicates that the tank is not yet fully clean.
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Removing and replacing the tank
Removing and replacing a fuel tank is a complex and potentially dangerous task that should be approached with caution. It is important to ensure that you have the necessary tools and safety equipment before beginning. This includes items such as wrenches, screwdrivers, a jack or hoist, a pump for removing the fuel, fuel-rated containers, rags, and a fire extinguisher. It is also recommended to have an assistant to help with tools and to respond in case of an accident.
Before removing the tank, it is crucial to relieve fuel pressure and remove the ground cable from the battery to avoid sparks. The fuel should then be carefully siphoned out and stored in approved containers. Once the tank is empty, disconnect the hoses and electrical connectors. Be sure to identify and disconnect all relevant connections, including supply lines, return lines, and vent hoses.
After all, the connections have been disconnected; it is time to remove the tank. Loosen the nuts or bolts holding the metal straps that secure the tank, and be prepared for the tank to drop down. Support the tank to prevent it from falling when the last strap is removed. If the tank is being completely removed from underneath the vehicle, ensure that it is raised high enough to clear the frame members.
To install the replacement tank, simply reverse the removal process. Secure the tank by tightening the straps and reconnecting the hoses and electrical connectors. Don't forget to refill the tank with fuel. It is important to follow safety precautions throughout the entire process and work in a well-ventilated area away from potential sources of ignition.
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Using a vacuum
Firstly, it is important to note that you should never use a regular vacuum cleaner for this task due to the risk of fire. Always opt for a wet and dry vacuum specifically designed for this purpose, ensuring it has the necessary attachments, such as a long hose and nozzle. Before using a vacuum, you must remove the fuel from the tank. This can be done by siphoning the fuel or using an engine oil vacuum extractor. It is crucial to be cautious during this step to avoid any accidents.
Once the tank is empty, you may need to loosen the sediment. One method is to use a pressure washer nozzle, inserted into the filler pipe, to wash the inside of the tank. You can also add a small amount of water to the tank, slosh it around, and then extract it, repeating this process several times. This will help to dislodge and remove the sediment.
After loosening the sediment, it's time to use the wet and dry vacuum. Ensure the vacuum is suitable for use with flammable liquids, and always follow the manufacturer's instructions and safety guidelines. Use the vacuum to remove any remaining sediment and water from the tank, being careful to reach all areas, especially the bottom, where sediment often accumulates.
Depending on the size and depth of your tank, you may need to get creative with the vacuum's extraction hose. You might need a longer hose to reach the bottom of the tank effectively. It is important to be cautious and thorough during this process to ensure all sediment is removed.
Finally, after vacuuming, it is essential to allow adequate time for any remaining fumes to dissipate before refilling the tank with fuel. This step is crucial for safety, as fuel fumes can be highly flammable. Allow at least a week for the tank to air out, and consider using a fuel polisher or additional filters to ensure any remaining sediment is captured.
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Adding a fuel additive
If you are experiencing sediment in your fuel tank, there are several fuel additives that can be used to clean it.
One recommended product is Chevron's Techron Complete. Multiple independent professional automotive technicians recommend this product to keep fuel injectors clean. It can be added to your gas tank to clean the fuel injectors and return them to a near-new flow. However, it may take several tanks of gasoline to take effect.
Another option is to use a fuel injector cleaner that contains PEA (polyether amine). These products can effectively clean fuel injectors, but it is important to note that they may not work for direct injection fuel injectors, which inject fuel directly into the combustion chamber.
Additionally, you can try using a pre-filter. This is a universal, clear, and cheap throwaway filter. Simply keep replacing it until you no longer see any sediment in the fuel.
If you are experiencing issues with "diesel bugs," a product like Startron biocide may be useful. It contains enzymes that eat up the slimy residue left by dead diesel bugs, preventing them from blocking the fuel filter.
For those who need to store large containers of gas and diesel, Star-Tron Gas Tank & Fuel System Cleaner is a recommended option. It cleans the tanks and acts as an additive for gas and diesel, breaking up tank sludge so it can be burned off by the engine.
Finally, if you suspect that water accumulation is causing oxidation and sediment in your aluminum tank, you can try adding a bottle of Stabil to your fuel each time you fill up. This will help to remove the water and keep your tank clean.
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