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B44 50 year old sludge

Discussion in 'BSA' started by gjr, Mar 13, 2019.

  1. gjr


    Mar 5, 2010
    The crud in the bottom of the oil tank has the consistency of roofing tar on a 40 degree (F) day. Picking out with the tip of a screw driver seems laborious at best and not totally effective. What can I use to soften it up without risking burning down my shop or worse ?


  2. jbruney


    Jan 5, 2019
    Varsol & paint stir stick. Drain & repeat until clean.
  3. oldbeezer

    oldbeezer VIP MEMBER

    Nov 2, 2017
    go to a self serve car wash. put the tank in something that will keep it from rolling/flying away milk crates work well. put on some old clothes you no longer want and some eye protection. get your quarters out and stick the wand in the tank and watch out!!
  4. Bernhard


    Apr 20, 2011

    Use acetone cleaning fluid or nail vanish remover, (same thing) with a long wire brush -yes they are available. You can get Acetone in 1 litre or bigger from fibre glass supplies. Any you have left over, your girlfriend/wife/mother will love you!

    If you think cleaning a oil tank is bad, wait till you see the bottom of your fork legs!!!!
  5. jbruney


    Jan 5, 2019
    Just put new stanchions & seals in my forks...nasty stuff hiding in the very bottom where nasty stuff hides. Anyway however you diddle your dog you'll enjoy knowing it's clean.
  6. kommando


    May 7, 2005
    If you plan on repainting the tank a radiator repair shop will clean it back to bare metal inside and out.
  7. Bob Z.

    Bob Z.

    Mar 30, 2012
    If you want to preserve the original paint I suggest soaking/sloshing diesel fuel after warming the tank with hot water.
    Nail (fingernail) polish remover is really diluted (10%?) acetone with perfume.
    Not really good for this job.
    Straight acetone from the paint store will clean it but the fumes can be extremely dangerous.

    I agree on cleaning the old fork sliders, very satisfying job to get them clean.
  8. Jackson5


    Jan 25, 2015
    Take the tank off and clean it with Stoddard solvent, cleaning solvent. Kerosene works well too and won't damage the paint.
  9. desmo


    Aug 16, 2019
    get a big hand full of nuts the hexagonal
    type of course ,put them inside of tank with some kerosene and shake vigourously it works good
    you can count the nuts before and after if your a bit paranoid

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