Page 2 of 4 FirstFirst 1234 LastLast
Results 11 to 20 of 39

Thread: Glass beading crankcase

  1. #11
    Join Date
    Nov 2018
    Location
    Reno NV
    Posts
    207

    Default

    Quote Originally Posted by T. Cotten View Post
    Welcome, Steve!

    Just coat the insides...

    (Unfortunately, both Gasoila and Glyptal failed in my fuel immersion tests, which would simulate a bad petcock on an OHV. So I haven't many suggestions..)

    ...Cotten
    Cotton,
    Have you done any tests on Ethanol free fuel?

  2. #12
    Join Date
    Sep 2005
    Location
    Sarasota, Florida
    Posts
    4,180

    Default

    Quote Originally Posted by larry View Post
    Simply scrubbing with detergent and water will make a big difference. Abrasive blasting should be avoided. Baking soda blasting is safe, but will change the appearance somewhat.
    Good advice. I don't glass bead any motor parts, and particularly aluminum castings. I clean castings in our laundry sink and use anything from TSP, Comet, Dawn, scrub brushes, scouring pads, and tooth brushes. You'll never make your cases look like they did when H-D put them in a frame, but you can come close.
    Eric Smith
    AMCA #886

  3. #13

    Default

    I've found embedded glass beads in the surfaces of carefully cleaned aluminum castings, and in other very bad places (behind races, blind threaded holes, inside oil passages, snap ring grooves, etc.).
    A few thousand vibrations later, they reappear and flush through the oil system as an abrasive slurry.

  4. #14

    Default

    Quote Originally Posted by kitabel View Post
    I've found embedded glass beads in the surfaces of carefully cleaned aluminum castings, and in other very bad places (behind races, blind threaded holes, inside oil passages, snap ring grooves, etc.).
    A few thousand vibrations later, they reappear and flush through the oil system as an abrasive slurry.
    Wow.... exactly what I feared... Does not sound like a recipe for a long running motor... Thank you!

  5. #15
    Join Date
    May 2009
    Posts
    144

    Default

    A friend, as an experiment, blasted a piston. He then scrubbed it with detergent and hot water. He then put it in a pot of water and boiled it. When he finished, there was sand at the bottom of the pot.

  6. #16

    Default

    Quote Originally Posted by larry View Post
    A friend, as an experiment, blasted a piston. He then scrubbed it with detergent and hot water. He then put it in a pot of water and boiled it. When he finished, there was sand at the bottom of the pot.
    Wow! would never have expected that! Thanks!

  7. #17
    Join Date
    Oct 2011
    Posts
    486

    Default

    I would put the cases in front of a space heater ,then hit with a foam type degreaser and scrub brush..Dont glass bead.
    Tom

  8. #18
    Join Date
    Jun 2001
    Location
    Central Illinois, USA
    Posts
    4,343

    Default

    Quote Originally Posted by aumick10 View Post
    Cotton,
    Have you done any tests on Ethanol free fuel?
    That would just be more junk science, Mick!

    There are over a hundred and fifty Federally-allowed additives, and combinations are more digestive than any alone.

    Injector cleaners, mandated Intake Valve Deposit inhibitors (IVDs), "detergents", etc. are why plug reading is now futile.

    Ethanol just makes them all worse.

    ....Cotten
    PS: Even if ethanol-free fuel was available, who wants to only ride in a circle around that pump?
    Last edited by T. Cotten; 11-05-2019 at 09:50 AM.
    AMCA #776
    Dumpster Diver's Motto: Seek,... and Ye Shall Find!

  9. #19

    Default

    Quote Originally Posted by tfburke3 View Post
    I would put the cases in front of a space heater ,then hit with a foam type degreaser and scrub brush..Dont glass bead.
    Tom
    Awesome Idea!! Thank you!!

  10. #20

    Default

    Glass beading will close the pores on aluminum castings so it will capture the beads. If you have to clean use silica sand for the media, it will not close the casting pores and leaves a satin looking finish. Silica is another grit that must be removed from the castings before use as in scrubbing, washing very thoroughly.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •