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rust

Discussion in 'XJ Technical Chat' started by seanvfr, Jun 11, 2009.

  1. seanvfr

    seanvfr New Member

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    Any ideas guys on how to fix a rusty petrol tank on my xj650, its INSIDE my tank!!! 8O , thanks in advance guys. Sean.
     
  2. Shannon72

    Shannon72 Member

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  3. hammerheadx

    hammerheadx Member

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    Most auto parts stores sell a kit called KREEM.

    Also, eastwood.com sells a motorcycle specific kit for $30.00 It is a several step process and you have to get your own muriatic acid and acetone, but i've done two bike tanks with the Eastwood kits and they've never leaked.

    You MUST follow the directions EXACTLY though and becareful because the chemicals will attack your paint.
     
  4. Nighthawk

    Nighthawk Member

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    I may have spent to much but my tank had several holes from rust in it some hole where covered up with jb wled 15 years ago so I sent my tank to Moyers gas tank repair in PA and for 350 it came back already to paint. The inside looks great with a guarentee.
     
  5. Desinger_Mike

    Desinger_Mike Member

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    POR 15 gas tank treatment has my vote.

    Do the prep properly or you are wasting your $$
     
  6. MN-Maxims

    MN-Maxims St. Paul Minnesota

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    I just went to Lowes and got some phospheric acid. Concrete cleaner. I poured it in and added some water and a 90 min later my tank was clean. I taped the fuel sender hole and petcock hole with duct tape. I also taped the gas cap hole and sloshed the mix around several times. All done and washed out with baking soda water and then put some deisel fuel in with the water to coat the metal surfaces. Drained out all the water and sucked out with a wet vac and then put laquer thinner in and then swished that around to pick up any left over moisture. I then placed paper towels in through the gas sender hole and soaked up the thinner. Put it all back togeather and put on the bike and its still rust free. I think it worked good for me. I have heard storied of the "tank Liner" Stuff peeling of and making a bad situation worse. I just decided to avoid all that.

    MN
     
  7. Geej

    Geej Member

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    When you say "poured in" you mean completely topped off the tank with the mix? And how many parts water to acid did you use about?

    I just picked up a new(to me) '82 SECA 750...went through the carbs, re-shimmed the valves and now need to deal with what appears to be some light surface rust in my tank ... evidence of light rust particles were found in the fuel line and a little in the carbs so....
    Thanks!
     
  8. bigfitz52

    bigfitz52 Well-Known Member Premium Member

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    We had a big discussion about this; search "any rust in tank acceptable."

    You can use electrolysis, or any number of acid treatments with and without a coating afterward.

    Personally, I did pretty much what MN-Maxims did; got a jug of concrete cleaner, dumped it in, filled the rest of the way with water and let it sit for about an hour. Flushed out with water; followed by a mixture of SeaFoam, gasoline and motor oil. Flushed again with SeaFoam and gas mixture; then ran 4oz. SeaFoam in the first tank of gas. It's been rust free ever since; very little if anything showing up in the (inline) fuel filter.

    One more bit: the phosphoric acid treatment killed the gas cap seal. (I probably should have removed it and taped the hole instead.) I got a new one from chacal and it's 100% now.
     
  9. wamaxim

    wamaxim Active Member

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    If you are going to coat the inside of your tank google "2 part gas tank sealer". The products are epoxy based and, unlike some of the older products, should not flake off. They seem reasonably priced.

    Lroen
     
  10. Geej

    Geej Member

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    Yeah, I've done a number of searches but for my situation, I think I too will do what MN-Maxims did as well. For now, I was going to try and avoid coating the tank....though I will need to do a more compleat exam of the inside I suppose.
    I bet that concrete cleaner would tear up the petcock and fuel sender gaskets as well, so they all need to come off before treatment yes?
    Thanks for the replies!
     
  11. bill

    bill Active Member

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    Yea it will tear up the rubber. When you tape the openings make sure you get a good seal - the stuff will eat paint for sure.
     
  12. xj650ss

    xj650ss Member

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    I used the kreem 3 part kit for mine and it worked great so far no problems and the inside of my tank looks like its ceramic coated, if you do it right it will never flake or peel just don't cut any corners
    Shaun
     

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