Tank Liner

Discussion in 'Airheads' started by tlux, Mar 20, 2012.

  1. kantuckid

    kantuckid Long timer

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    I have seen Kreem linings fail on tanks I didn't clean and what I had to clean out was not a material that seemed to have the toughness of POR-15.
    On that other notion of oil in rockers-lots of old timers used to do it. A better way is to treat a newer rocker with the waxy goop you spray inside.
    #41
  2. benthic

    benthic glutton 4 punishment

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    quasi urgent follow up...

    I started the por 15 treatment today, but have a question - the can of stripper did not strip everything out. How clean does the inside need to be before moving on? Should i go get some more paint stripper and keep sloshing it around till i have bare metal inside?

    thanks!
    Spencer
    #42
  3. benthic

    benthic glutton 4 punishment

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    ok, since no one has chimed in, i'll relate my weekend activities and "solution"...;)

    After my previous message, I tried 2 additional different types of stripper in an effort to remove the original liner, but to no effect. the liner that is still in there is STUBBORN. So i chatted with my gurus and decided to wait to today to call POR15 and get some real advice... So that's what I just did.

    I called them up and described that the stripper had not removed all the liner, and that i had tried other strippers, but the liner is pretty stubborn. the guy said I COULD proceed with the rest of the steps with original liner in, but that i SHOULD have bare metal inside the tank. I guess there is really no way of knowing if the POR15 liner will bond correctly if there is old liner present, he said it could be 1 year, it could be decades before delamination might occur. A bit of CYA on their part, but a legitimate concern. However! without me even asking for it, he offered to send me some more POR15 stripper for FREE for me to give it another try. He also told me to leave the liner in longer and to put some chain or something in the tank (familiar advice). He suggested leaving the stripper in for a few hours on the stubborn spots.

    All good information, and great service giving me more product. However, a bit irritating because the instructions on the kit make NO mention of putting a chain or nuts or anything in the tank and are very specific about not leaving the stripper in for longer than 1 hour. If the instructions had been a be more thorough, I would have done it this newly suggested way from the start.

    Anyway, I'll get the additional stripper probably next week. good thing I'm not in a hurry;)
    #43
  4. Dolly Sod

    Dolly Sod I want to do right, but not right now

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    any idea what kind of liner you're trying to remove?
    #44
  5. benthic

    benthic glutton 4 punishment

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    it's the original "red lead" liner installed in the old BMW tanks - tough stuff apparently!
    #45
  6. Horsehockey

    Horsehockey A GPS? Huh?

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    I relined my /6 big tank with POR-15 about three years ago. Perfect so far. The PO had Kreemed the tank so there was a combo of old red liner and gloppy Kreem. I bought a gallon of heavy duty paint stripper at Ace Hardware. Dumped half in, added about two cups of roofing nails, sealed the fuel cap and petcock drains with rubber from an old inner tube and tight zip ties, and shook the thing like a 58 year old working out at the gym with a bunch of college girls. Let it sit for a couple hours. Repeat. Two more hours. Repeat. Then sit overnite and shake again. Then dump the stripper out the petcock holes. Then dump the remaining two quarts of fresh stripper in and repeat the above. After about 48 hours I had a nice clean interior. Dump as many nails as you can, then use your extension magnet to get the remaining ones.

    Then put it through the regular POR-15 procedure.

    The key to this whole process is a Catholic upbringing. The more you suffer in life, the more likely it is you hit the Heaven payday. Start to finish my bike was off the road for a full week to get this done, but glad I did it. You can take a little peak at every gas fill and smile with self-satisfaction (not too much though, or you'll void your Heaven warranty).
    #46
  7. Bill Harris

    Bill Harris Confirmed Curmudgeon

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    In the mid-'90's I let gasoline evaporate unused in my tank and trashed the liner. I flushed it out and put up with flakes and stuff clogging carbs til I decided to reline the tank in the early 2000's with KREEM. I did a good tank prep and it's held up well, but I've always been cautious to avoid ethanol-laced gasoline. I've toyed with the idea of doing a pre-emptive removal of the KREEM and relining it with POR before I repaint the tank. This way I won't need to worry about using gasohol and trashing the tank liner.

    Good to find that the paint stripper works on removing the KREEM. I was considering using MEK (which will dissolve the KREEM), and I suspect that the paint stripper has MEK as a major active ingredient.


    Benthic, my takes is that if you have a few spot sof the factory red-primer liner still adhering, I wouldn't sweat it. If it's still there after all you've done, it is permanent enough.
    #47
  8. tlux

    tlux Adventurer

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    I ended up not relining my tank. I took it to my friend at the motorcycle shop and he felt it was worth not messing with since I am not having any issues with it. It looks good inside with only 1 little section lifting and exposing clean metal. Since I posted this I have been striping, sanding and repainting the body work from my R90/6. I would like to show y'all some pics of the process. Should I post them here or should I start a new thread since I am changing the subject?
    #48