How To Clean A Gas Tank That Has Been Sitting?

How To Clean A Gas Tank That Has Been Sitting?-Auto Guides

Whether you are renovating an old car, servicing a mower or a motorcycle, you will probably need to clean the fuel tank at some point. It may seem like an overwhelming task for a novice. However, with a little work and knowledge, you will be able to clean the fuel tank. After all, you’ll have a tank free of dirt and debris that could damage the engine.

Over time, deposits and rust will accumulate in the fuel tanks of old cars. Of course, fuel filters can work, but if they are not replaced frequently enough (or never!), The fuel tank may need to be thoroughly cleaned. After all, even in any vehicle that has been sitting for several months, there will be problems with condensate in the fuel tank, which can lead to corrosion (at least in a metal fuel tank). If you buy a vintage car for repair projects or buy a car that has been sitting for a while, this is usually one of the top priorities.

The next time you perform maintenance work under the body of the vehicle, such as replacing the fuel pump, and remove the fuel tank, clean it thoroughly to extend the life of the engine.

How to clean a fuel tank without removing it

Manually cleaning your fuel tank isn’t the most straightforward job, but depending on the age of your car and the shape of your fuel filter, it may be worthwhile to get all of the sediment and other accumulated debris out.
If you are wondering how to clean a fuel tank without removing it, we have some bad news. The best way to clean out your gas tank is to remove it. If you are working on your fuel pump, this is a great time to clean out your gas tank.


When handling fuel or other flammable materials, keep a fire extinguisher nearby and ventilate the work area appropriately to avoid inhaling vapors. Wear safety glasses, a breathing mask and protective gloves.
Do not smoke or allow anyone in the workplace to use an open flame or a tool that creates a spark, such as a propane torch, heater or welding tools.
Never throw fuel into a public sewer system or put fuel-soaked textiles in a closed waste bin.


  1. Drain the fuel tank into an approved container.
  2. Clean rust and debris from the top of the fuel tank.
  3. REMOVE THE FUEL PUMP Remove the fuel pump from the tank.
  4. SWIRL Shake the gas tank, pour the rest of the gas and debris.
  5. CLEAN INSIDE THE TANK Clean the inside of the tank with a low-lather soap and water mixture.
  6. Swirl again Shake the cleaning solution inside the tank.
  7. DRAIN AND DRY Drain the tank and dry it with compressed air and / or a lint-free cloth.
  8. TO INSPECT Visually inspect the tank and replace it if it is damaged.
  9. CHECK IF IT’S DRY Confirm that the tank is completely dry (approx. 30 min).
  10. FILL Fill the tank with new fuel.

Be sure to use fresh fuel with the new fuel pump. This prevents contamination from returning to the clean tank. Manual cleaning of your gas tank shouldn’t take you more than an afternoon once you do some practice. And an afternoon spent in your car is certainly worth it.