Socket Head Cap Screw Problem

Discussion in 'The Garage' started by Hootowl, Dec 8, 2012.

  1. Hootowl

    Hootowl Long timer

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    I've got a buggered cap screw (Allen) head bolt in a cramped location with very little room to maneuver tools around the head of the bolt.
    The socket head isn't very deep. An easy out doesn't grab enough bolt material to do its job.
    There isn't room around the outside of the bolt to use a tool that grabs the outside of the bolt

    The only idea I have right now is welding a nut to the head of the bolt but that's going to be problematic as well due to the space constraints.

    Any high tech tools out there in the market place that might work?

    Ever use these? http://www.grahamtool.com/boltandscrewextractor.aspx

    Richard
    #1
  2. ABHooligan

    ABHooligan The Flying Mythos

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    Sometimes I use a cutting wheel on a dremel tool to make a slotted head, then remove the screw with a flathead screwdriver.
    #2
  3. Midnightventure

    Midnightventure -

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    If you can get to the side of the head with a sharp center punch sometimes you can strike the center punch sharply and loosen it.
    #3
  4. Hootowl

    Hootowl Long timer

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    Thanks for the ideas so far.
    I forgot to mention that the bolt is in way too tight hence the buggered head.
    I hate fixing other people's FU's!
    #4
  5. gpounce

    gpounce Been here awhile

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    If you can swing it, welding a nut on is a common technique, the sharp spike of heat also helps break loose any corrosion/locktite etc that may make removal more difficult. I've never yet had any of the magic tools work for me otoh using a left-hand drill to core out the screw shank often loosens it to the point where the torque imposed by the drill unscrews it. Of course getting a left hand drill into play and not wandering out the side of the bolt and not going too deep is the fun part...
    #5
  6. KeithinSC

    KeithinSC Long timer

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    Get a Torx bit a little larger than the hex. Pound it into the cap screw. Hopefully the hammering will help break it free, and the fluted on the Torx have enough meat not to strip out further. Might ruin the torx:cry

    Heat it if possible the cool it quickly. Thermal shock.

    Good luck.
    #6
  7. fritzcoinc

    fritzcoinc Enjoying my last V8

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    Three suggestions:

    Cut a pc of shim stock to wrap arond the allen wrench and drive it into the socket. This may give enough grip to get it out.

    Try a hand held hammer type impact. Again drive a over size allen ( inch size or Torx ) into the socket. The blows from the impact do wonders to loosen up stuck bolts.

    From now on, try anti sieze to prevent reoccurance.

    Wrap shim stock like this:
    [​IMG]

    Drive it in there: ( is that what she said? )
    [​IMG]
    #7
  8. Stan_R80/7

    Stan_R80/7 Beastly Gnarly

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    Welding an allen hex bit into the cap screw is another (similar) option. The graham tool bolt extractor may work. Then, when it doesn't, weld it into the head of the cap screw. Good luck!
    #8
  9. D.T.

    D.T. Difficult but useful

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    Vice grip?
    #9
  10. anotherguy

    anotherguy Long timer

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    Occasionally a Torx bit driven into a bad allen will remove it.
    #10
  11. Hootowl

    Hootowl Long timer

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    Not enough room
    #11
  12. Hootowl

    Hootowl Long timer

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    Thought of that already but not enough room to wack it with a hammer
    #12
  13. stainlesscycle

    stainlesscycle Long timer

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    drill it out with a bit slightly larger than the diameter of the shaft. the head will spin off, removing the pressure from the shoulder of the head. then remove part, and remove remnants of screw. or use a left handed bit. either way if it's seized from overtightening, once you remove the head, it will be simple.
    #13
  14. Benesesso

    Benesesso Long timer

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    Can you post a good sharp pic of it?
    #14
  15. anotherguy

    anotherguy Long timer

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    Well I'll be damned. A John Bircher sighting.
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  16. dave186

    dave186 Been here awhile

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    #16
  17. trc.rhubarb

    trc.rhubarb ZoomSplat!

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    Torx has saved me every time. Gotta be a way to get pressure in there even if you need to wedge it with a prybar.
    #17
  18. Contevita

    Contevita Cigar Adventurer

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    I've used this method and it worked for me each time I used it.
    #18
  19. Zuber

    Zuber Zoob

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    Hey Richard, so the vice grips won't grip.

    I try to cut a small slot across the top. Try a file first, don't want any abrasive near the cams. Then tap it with a punch. Tap it at 180 deg along the edge. I've done this several times with drain plugs. If it doesn't work, then at least this may loosen it up.

    Those bolts on the cam bridge are very hard, but they can be drilled with a cobalt bit. You can drill the head off, pull the bridge and then the shank will be sticking up and it will be loose enough to spin out with fingers. You may have to lower the engine to get a straight shot at it.
    #19
  20. SidewaysCarolina

    SidewaysCarolina Adventurer

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    i had to weld a allen wrench to a bolt today on a ducati streetfighter. Ive used most of the extraction tools out there and
    for my cave man brain the best solution seems to always be weld the bolt to a socket/allen wrench. just my 2 cents
    #20