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filler material

Discussion in 'The Hokey Ass Message Board' started by lcfman, Jul 12, 2013.

  1. lcfman
    Joined: Sep 1, 2009
    Posts: 276

    from tn

    I need to fill and smooth a hole in an aluminum valve cover before painting.
    The hole is blind and is 3/16 diameter and 5/8 deep. I thought about using
    JB Weld. Anybody have good idea?
  2. fsae0607
    Joined: Apr 3, 2012
    Posts: 871


    That's probably what I would do. Fill it, sand it smooth, paint away!!! :)
  3. Dane
    Joined: May 6, 2010
    Posts: 1,351

    from Soquel, CA

    JB Weld - Best idea since toilet paper.
  4. Why not take it to a local welding shop and let them repair it
    properly. HRP

  5. aaggie
    Joined: Nov 21, 2009
    Posts: 2,531


    J-B would probably work but I would weld it up and finish off the bead.
  6. Rusty O'Toole
    Joined: Sep 17, 2006
    Posts: 9,514

    Rusty O'Toole

    I saw an article in an English antique motorcycle magazine where the guy was restoring a 30s motorcycle. The cast aluminum clutch cover had 2 deep pits corroded into it.

    He drilled right through the pits and took pieces of aluminum rod the same diameter as the drill. Peened them into the hole like a rivet. Filed, sanded and polished the cover smooth. When he was done it looked brand new. I expect he countersunk the holes just a hair to help the repair hold on.
  7. G-son
    Joined: Dec 19, 2012
    Posts: 773

    from Sweden

    Well, I'd say you are half right - weld is good, but there shouldn't be any JB in it. ;)
  8. chopolds
    Joined: Oct 22, 2001
    Posts: 5,927

    from howell, nj
    1. Kustom Painters

    Welding is always the preferred method, but a couple times I've done "quick and dirty" repairs on aluminum that wasn't practical to remove, weld or repair correctly. I used an epoxy similar to JB, but had aluminum flakes in it, so the color match was better, and a bit stronger.
  9. Thread the hole and use a threaded aluminum rod, no JB, smooth and paint

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