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Gas Tank Cleaning

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  • Mike T.
    Very Frequent User
    • August 31, 1979
    • 118

    Gas Tank Cleaning

    I have an gas tank with no rust, but it's full of black varnish from old/evaporated gas. Any suggestions as to what product(s) are out there that do a good job cleaning them out?
    Thanks.
  • Bob S.
    Very Frequent User
    • August 12, 2007
    • 185

    #2
    Re: Gas Tank Cleaning

    Mike,
    I poured about 2 gal. of laquer thinner in mine and gave it a good shaking for several minutes making sure to turn it all directions and then poured it out. I then repeated the process and would let the tank sit in various positions for an hour or so each. The third time the laquer thinner came out clear and free of debris.
    I checked the tank with a bore scope afterward and everything looked good. It worked in my 59. - Sully

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    • Christopher R.
      Extremely Frequent Poster
      • March 31, 1975
      • 1599

      #3
      Re: Gas Tank Cleaning

      I bought the Eastwood kit to recondition gas tanks, and did this job. They tell you to use lacquer thinner. It did seem to clean everything out inside the tank. You can help it out by inserting a length of chain in there with the lacquer thinner and shaking the tank around. Will give you a good upper body workout. Tie a long string to the chain and leave one end of the string out so that you can easily retrieve the chain.

      When you finish, you'll have a toxic waste disposal problem of what to do with a few gallons of dirty lacquer thinner. Most towns have toxic waste disposal day where you can bring this to a designated site.

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