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Testing Fuel Tank for Leaks

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    Testing Fuel Tank for Leaks

    After attempting to seal my tank earlier this year with the POR-15, I found a couple of small leaks have developed causing the paint to bubble up but nothing is ever on the ground. I found a 550T tank on EBay that I'm looking to purchase if the seller relists it since I couldn't afford it right now after buying parts for Charmayne's bike this weekend.

    If I can get it, how much fuel do I really need to add to the new tank to test if it is leaking?

    Are there other ways of testing it or am I better off at just slapping it on the bike and hoping for the best?
    Cowboy Up or Quit. - Run Free Lou and Rest in Peace

    1981 GS550T - My First
    1981 GS550L - My Eldest Daughter's - Now Sold
    2007 GSF1250SA Bandit - My touring bike

    Sit tall in the saddle Hold your head up high
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    and don't be scared, just enjoy your ride - Chris Ledoux, "The Ride"

    #2
    If it has a liner you can just fill it with water and not worry about rust. Or you can fill it with gas and set it on a new sheet of cardboard to see if it leaks. Least the gas wont promote rusting.
    MY BIKES..1977 GS 750 B, 1978 GS 1000 C (X2)
    1978 GS 1000 E, 1979 GS 1000 S, 1973 Yamaha TX 750, 1977 Kawasaki KZ 650B1, 1975 Honda GL1000 Goldwing, 1983 CB 650SC Nighthawk, 1972 Honda CB 350K4, 74 Honda CB550

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    I would rather trust my bike to a "QUACK" that KNOWS how to fix it rather than a book worm that THINKS HE KNOWS how to fix it.

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      #3
      Originally posted by cowboyup3371 View Post
      If I can get it, how much fuel do I really need to add to the new tank to test if it is leaking?
      MOST of the time, the leaks will be at (or very near) the bottom, because water is heavier than gas and settles there.

      The only leak I have had was about an inch from the bottom of the left side.

      .
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        #4
        I've seen several tanks with pinholes on the top crown. Presumably there was some condensation that rose in the tank. Mostly the leaks are on the bottom though.
        Ed

        To measure is to know.

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