How To Clean The Inside Of A Gas Tank

Last Updated on October 6, 2023 by Matthew Lloyd

Cleaning the inside of a gas tank is a crucial maintenance task to ensure optimal vehicle performance. To clean the gas tank, you will need a fuel tank cleaner, towel or rag, garden hose with a nozzle, gloves (optional), water, dish soap, fuel tank brush, an empty container, and a siphon hose pump. The process involves draining the fuel tank, removing it from the vehicle, cleaning it using options like scraping, non-abrasive cleaner, or vinegar, and then safely putting the tank back.

The Importance of Cleaning Your Gas Tank

Before we delve into the cleaning process, let’s understand why cleaning the inside of your gas tank is essential:

• Improved Performance: A clean gas tank ensures smooth fuel flow to the engine, enhancing your car’s overall performance.
• Prevention of Contamination: Over time, dirt, debris, and rust can accumulate inside the tank, leading to fuel contamination and potential engine damage.
• Extended Lifespan: Regular cleaning helps maintain the longevity of your fuel system, reducing the risk of costly repairs or replacements.

Assessing the Condition of Your Tank

Before proceeding with the cleaning process, it’s crucial to assess the condition of your gas tank. This step will help you determine the appropriate cleaning method and whether replacing the tank is necessary. Consider the following factors:

• Build-up: Identify the type of deposits in the tank, such as varnish, rust, or both. This knowledge will influence your choice of cleaning method.
• Structural Integrity: Inspect the tank for any signs of damage, such as leaks or weakened areas. Cleaning a compromised tank may exacerbate the problem, necessitating replacement.

Cleaning Methods and Alternatives

Now that you’ve assessed the condition of your gas tank let’s explore different cleaning methods and alternatives:

Professional Cleaning Services:

• Radiator Shops: Some radiator shops offer fuel tank cleaning services using chemical solutions. They can effectively remove built-up deposits and restore your tank’s cleanliness.
• DIY with Commercial Products: Several commercial products are designed to clean fuel tanks. These products often come with instructions on their safe and effective usage.

DIY Cleaning Options:

• Denatured Alcohol: Denatured alcohol, known as methylated spirits, is an inexpensive and readily available alternative for removing sludge and varnish. Ensure thorough removal of the loosened deposits from the tank.
• Acetone and Lacquer Thinner: While more expensive, acetone and lacquer thinner effectively cut through varnish. However, exercise caution as they are less compatible with gasoline.
• Vinegar: Plain white vinegar is a safer option for rust removal. However, due to its high water content, ensure meticulous rinsing and drying to prevent the reoccurrence of rust.

Step-by-Step Guide to Clean the Inside of a Gas Tank

Materials You’ll Need

Before we delve into the cleaning process, let’s gather the necessary materials:

1. Fuel tank cleaner
2. Small towel or rag
3. Garden hose with a nozzle (preferably one with a trigger lock)
4. Gloves (optional)
5. Water
6. Dish soap
7. Fuel tank brush (to brush off debris)
8. Empty container (for used fuel)
9. Siphon hose pump (for transferring fuel)

Step 1: Drain the Fuel Tank

• Prepare an empty container to avoid fuel spills.
• Connect a siphon hose to a pump capable of handling the task.
• Ensure the hose is long enough to reach the bottom of the gas tank.
• Remove the fuel tank cap and pour any remaining fuel into the container.

Step 2: Remove the Fuel Tank from the Vehicle

• Turn off the vehicle and remove the key from the ignition.
• Open the hood and locate the fuel-fill neck with a small cap with a hole.
• Remove the cap and pour any remaining fuel into the container.
• Close the hood and prepare to clean the inside of the gas tank.

Step 3: Clean the Fuel Tank

Option 1: Scrap loose dirt and debris from the tank’s sides.

• Fill a gallon bucket with warm water and dish soap.
• Create a lather and scrub the tank’s surface with a rag.
• Rinse off the tank with a hose to remove any residue.

Option 2: Use a non-abrasive fuel tank cleaner.

• Follow the instructions provided by the cleaner.
• Use a cloth or brush to clean the tank thoroughly.
• Let the tank dry completely before refilling it with fuel.

Option 3: Use vinegar for easy rust removal.

• Create a mixture of baking soda and vinegar.
• Pour the mixture into the tank and let it sit for a while.
• Rinse off the tank and ensure it is empty of the mixture.

Step 4: Safely Put Back the Tank

• Carefully position yourself to protect yourself from potential injury.
• Lift the tank slightly with one hand to prevent it from getting stuck.
• Place your other hand on the tank and rotate it toward you.
• Gently pull down on the tank until the cap clicks back into place.

Precautions and Potential Issues

During the cleaning process, it’s essential to be aware of potential issues and take necessary precautions:

• Electrolysis Limitations: Electrolysis cleaning may not effectively reach internal baffles, limiting its ability to clean the tank thoroughly.
• Acidic Solutions: Acidic solutions like muriatic acid can damage metal and may not be suitable for all fuel tank components. Additionally, chlorides left behind can promote corrosion.
• Water-Based Solutions: Ensure complete evacuation of water-based solutions from the tank, as any remaining moisture can lead to rust formation.
• Safety Measures: When working with chemicals or toxic substances like muriatic acid or acetone, ensure proper ventilation and follow safety guidelines to protect yourself.

Additional Considerations and Tips

Here are some additional considerations and tips to keep in mind:

• Draining vs. Cleaning: Draining the old gas from the tank does not remove the accumulated sludge. Thorough cleaning is necessary to ensure optimal performance.
• Safety Precautions: Take proper precautions when handling old gasoline to avoid health hazards. Work in a well-ventilated area and use protective gear as needed.
• Monitor Fuel Quality: Consider installing a temporary inline fuel filter after cleaning the tank to monitor any remaining debris or contaminants.
• Protect Your Carburetor: Contaminants from a dirty fuel tank can lead to carburetor damage. Keep your fuel tank clean to safeguard your engine’s performance and longevity.

Conclusion

Cleaning the inside of a gas tank may seem daunting, but with the right approach and knowledge, you can successfully restore your tank’s cleanliness and ensure optimal fuel system performance. Assess the condition of your tank, choose an appropriate cleaning method, and follow the necessary precautions. By taking these steps, you’ll be able to maintain your car’s performance and avoid costly repairs.

Key Notes and Important Points

• Regularly clean the gas tank to maintain optimal performance.
• Choose the cleaning method that suits your needs (scraping, non-abrasive cleaner, or vinegar).
• Consider safety precautions and proper ventilation during the cleaning process.
• Evaluate the condition of the tank and consider replacement if necessary.
• Use a temporary inline fuel filter to monitor fuel quality.
• Be mindful of the compatibility of cleaning products with your specific tank and fuel type.

Frequently Asked Questions (FAQ)