Aluminum Gas Tanks
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Aluminum Gas Tanks

  1. #1
    Member ry-guy's Avatar
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    Default Aluminum Gas Tanks

    I have dual aluminum gas tanks in my Eliminator Sport, One of them has a pinhole leak in the bottom. The other tank has some corrosion on the bottom that looks like it could start leaking soon. Is there any way to stop this corrosion? Is there and any sealer I can use on inside of the tank. Do you think it would be safer to have somebody replace the entire bottom of the tank then seal it? Just checking my options here?

    I have another question too. The tanks do not have any type of vent. I thought the fuel fills were vented but they are not. I'm surprised the boat even ran without going into vapor lock. What is the correct way of venting the fuel system if I have an enclosed engine compartment?


    Thanks

    ry-guy
    84 Eliminator Sport, 454, Berk JG

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    Senior Member 1975sleekcraft's Avatar
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    Default 75 eliminator bubble deck

    i had a pin hole in one of my gas tanks. for me it was hard to find the leak once my tank was out...had mine welded...we think it happened from electrolysis. the only visible indication of the leak was a little discoloration of the aluminum...
    mine looked great on the inside....
    if yours is real bad you could replace the whole bottom......
    as for vents...
    the gas cap works as a vent...(not sure how-but they must).......

    ......i have rarely seen separate tank vent lines on jetboats..........

  4. #3
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    Quote Originally Posted by ry-guy View Post
    I have dual aluminum gas tanks in my Eliminator Sport, One of them has a pinhole leak in the bottom. The other tank has some corrosion on the bottom that looks like it could start leaking soon. Is there any way to stop this corrosion? Is there and any sealer I can use on inside of the tank. Do you think it would be safer to have somebody replace the entire bottom of the tank then seal it? Just checking my options here?

    I have another question too. The tanks do not have any type of vent. I thought the fuel fills were vented but they are not. I'm surprised the boat even ran without going into vapor lock. What is the correct way of venting the fuel system if I have an enclosed engine compartment?


    Thanks

    ry-guy
    Not aware of any sealer. Usually if we have a problem we have a welder that will repair the tank.As far as the second tank clean it the best you can and then pressure test if it holds pressure, run it. When you close the cap on your gas fill the center screw that holds the rubber gasket will alow enough venting. If you are running a high horsepower engine drill some small holes around the flat plate next to the screw that holds the rubber gasket.Remember when pressure testing use very low air pressure the tank was factory tested with only a few pounds.

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    Aviation supply companies that carry products and supplies for homebuilt experimental aircraft carry a product called a sloshing compound or sealer that you pour into the tank, move it all around to coat the inside, it seals any pinholes, leaks, etc. It is impervious to aviation gas, so should be good for any gasoline...shouldn't be too hard to track down.
    I used it in the tank on my project, and it was easy to use and did the job. Aluminum gas tanks sold for aircraft are similar to boat tanks with welded seams that can have pinholes....
    Good luck,
    Gordon

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    Re-member Willie B's Avatar
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    Quote Originally Posted by rotorrider View Post
    Aviation supply companies that carry products and supplies for homebuilt experimental aircraft carry a product called a sloshing compound or sealer that you pour into the tank, move it all around to coat the inside, it seals any pinholes, leaks, etc. It is impervious to aviation gas, so should be good for any gasoline...shouldn't be too hard to track down.
    I used it in the tank on my project, and it was easy to use and did the job. Aluminum gas tanks sold for aircraft are similar to boat tanks with welded seams that can have pinholes....
    Good luck,
    Gordon

    ...Might want to check with the mfg on wheather this product will stand up to todays ethenol fuels???... ...Por 15 that was used for saving fuel tanks in classic cars did not stand up...

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    Member ry-guy's Avatar
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    I have had tanks redone on my Bronco, and F-150 with the Renu, I think they bake the stuff on. The tanks came out great and never leaked again. But not sure if it will hold up to the new fuels. And I would have to figure another mounting method besides glassing them in.
    84 Eliminator Sport, 454, Berk JG

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    Senior Member rpm0414's Avatar
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    My fuel tanks have seperate vents. I would personally weld up the pinhole but would JB weld work in this case guys? Easy to use stuf and seals up pretty good.

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    Senior Member Sleek Freak's Avatar
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    some boats use vents because of the screw in cap, most others use flip top caps that self vent.
    Last edited by Sleek Freak; 04-13-2012 at 01:31 PM.

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    Senior Member H20MOFO's Avatar
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    Quote Originally Posted by rpm0414 View Post
    My fuel tanks have seperate vents. I would personally weld up the pinhole but would JB weld work in this case guys? Easy to use stuf and seals up pretty good.
    Long story short....I was told to weld on a gas tank...it had to be steam cleaned first...or the there could be enough fuel in the pores of the metal to cause an explosion when heat was applied. Maybe that was just a ploy for that welder to get an extra 65 bucks outta me
    Another Hot Boat refugee

  11. #10
    AIR POWER TAPPED OUT's Avatar
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    Gas Tank Sealer Kits - Eastwood Gas Tank Sealer

    Used this on my 70 chevy pickup, it had a aluminum tank behind the seat that leaked..

  12. #11
    Senior Member ol guy's Avatar
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    Quote Originally Posted by H20MOFO View Post
    Long story short....I was told to weld on a gas tank...it had to be steam cleaned first...or the there could be enough fuel in the pores of the metal to cause an explosion when heat was applied. Maybe that was just a ploy for that welder to get an extra 65 bucks outta me
    Maybe old school but have welded and seen fuel tanks welded BUT not before pumping carbon monoxide thru to remove any oxygen. No air --no fire!!

  13. #12
    Senior Member EVILFORCE's Avatar
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    They make a product called Cream. Has 2 parts. A cleaner and another liquid you put in and roll the tank around. If you still have a real radiator shop in your area most boil them out and weld or coat them for repair.
    No Fool Like A Old Fool is there?

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    southwindsforsure justsquirtin's Avatar
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    my brother uses a fuel tank liner on all his repairs and says it works great=RED-COTE=MANUFACTURED AND GUARANTEED BY DAMON INDUSTRIES=1-800-362-9850

  15. #14
    Member ry-guy's Avatar
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    Thanks everyone for the input, I have used the cream and Eastwood tank sealers in Harley tanks and my street rods but that was in new tanks. I found a local shop that does the Renu. They will steam clean the the tank and coat the inside and outside.
    84 Eliminator Sport, 454, Berk JG

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