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Fuel Tanks - Steel Or Polyethylene?

Discussion in 'Early CJ5 and CJ6 Tech' started by Oldpappy, Oct 5, 2021.

  1. May 22, 2022

    maurywhurt Member 2022 Sponsor 2021 Sponsor 2020 Sponsor

    Western North...
    Dec 12, 2009
    I didn't have my '67's original steel underseat gas tank relined, but on the recommendation of a friend, I bought Bill Hirsch's Auto Gas Tank Sealer Repair Kit ARK-01, which seemed to substitute nicely: https://www.hirschauto.com/AUTOMOTIVE-FUEL-TANK-REPAIR-KIT/productinfo/ARK-01/

    Prior to using the cleaner / degreaser, etch, and sealer in the kit, I had my tank media blasted externally, and internally as well to the extent possible. The blasting opened up a couple of very small, previously rust-filled holes in the bottom. After repeatedly rinsing the tank out with water to remove the remaining blast and rust particles inside, I used a heat gun to thoroughly dry it out. I filled the holes using the fuel tank repair putty that came with the kit, then used the remainder of the products as recommended.

    That was 4 years ago, and I haven't had any fuel tank problems since.
    Last edited: May 22, 2022
  2. May 22, 2022

    PeteL If it wasn't for physics, and law enforcement... 2022 Sponsor 2021 Sponsor 2020 Sponsor

    Hills of NH
    Aug 3, 2003
    Mine had about 100 pinholes. Sandblast and solder. Some holes I used a (copper) penny as a patch. It worked.

    On other vehicles I have used fiberglas cloth and resin. Not sure about the legality of that, although some vintage Brit bikes had fiberglas racing tanks.
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