Advertise on Bikeforums.net



User Tag List

Results 1 to 14 of 14
  1. #1
    Senior Member jnvw's Avatar
    Join Date
    Apr 2006
    Posts
    74
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Stuck Stem Bolt Question

    Title is just what it is, Stem Bolt will not even budge.
    However, the entire stem will rotate back and forth when holding onto the front tire/fork.

    Currently I am using some penetrating liquid to soak, but am looking at other ideas.
    The stem bolt is a 6mm Hex which sits about 6-8mm into stem its self (does that make sense)
    Here is a pic, thanks in advance for any help



  2. #2
    hello roadfix's Avatar
    Join Date
    May 2003
    Location
    Los Angeles
    My Bikes
    thank you for asking
    Posts
    18,502
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Did you try turning the bike upside down and applying penetrating oil directly to the stem wedge through the fork crown?

  3. #3
    Air
    Air is offline
    Destroyer of Wheels Air's Avatar
    Join Date
    May 2006
    Location
    Creating some FA-Qs
    My Bikes
    Nishiki Sport, Downtube IXNS, 1950's MMB3 Russian Folding Bike, MTB
    Posts
    3,608
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)
    Here's that so someone can see it.

    So, you can't unscrew it but it's not tight enough? Or you just can't get the stem out?

    If you can't get it out (and say the screw is loose but not completely out) then try tapping the end of the allen key with a hammer to push the wedge down and release it.
    Attached Images Attached Images

  4. #4
    Senior Member jnvw's Avatar
    Join Date
    Apr 2006
    Posts
    74
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Air View Post
    Here's that so someone can see it.

    So, you can't unscrew it but it's not tight enough? Or you just can't get the stem out?

    If you can't get it out (and say the screw is loose but not completely out) then try tapping the end of the allen key with a hammer to push the wedge down and release it.

    The stem moves back and forth (with a bit of effort) but the stem bolt its self will not budge.

    Currently the bike is upsie down with some penetrating oil sparyed into the fork, (that's the blame for the crappy pic)

  5. #5
    Senior Member
    Join Date
    Jul 2007
    Location
    Maryland
    My Bikes
    Bridgestone '90 RB-1, Giant TCR Alloy, 90's mountain bikes galore.
    Posts
    137
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Did you try using a pipe "cheater" on the stem bolt? A pipe "cheater" is just a steel pipe that you stick over the allen wrench to increase the torque.
    Last edited by Tinkeric; 10-30-07 at 09:45 PM.

  6. #6
    vasracer
    Join Date
    Oct 2007
    Location
    NYC!!!!
    My Bikes
    Leader LD-735TR, Mercier Kilo tt, 3Rensho pursuit(not complete)
    Posts
    247
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    take Roadfix's advise and turn the bike over and spray with penetrating oil. Usually what occurs with a steel steerer tube an and an aluminum stem wedge is that they basically weld to each other if not greased initially. This could be a quick fix or a matter of cutting your stem and replacing your stem and fork.

  7. #7
    Just ride. roadbuzz's Avatar
    Join Date
    Oct 2000
    Location
    C-ville, Va
    Posts
    3,244
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    After the bike has set upside down overnight with the penetrating oil, and it's right-side-up again, try to run some penetrating oil down around the stem bolt, so some gets to the wedge from the top side. Then, like Air suggested, loosen the stem bolt some, but with plenty of threads still engaged so you don't screw those up, and tap an allen wrench in the bolt with a hammer to try to jar it loose.

  8. #8
    Senior Member
    Join Date
    Jul 2007
    Location
    Maryland
    My Bikes
    Bridgestone '90 RB-1, Giant TCR Alloy, 90's mountain bikes galore.
    Posts
    137
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Oops, I had to edit that post. I got my terms mixed up; I meant pipe "cheater" not pipe wrench.

  9. #9
    Senior Member jnvw's Avatar
    Join Date
    Apr 2006
    Posts
    74
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    What's the rule after 3 beers?

  10. #10
    Senior Member Spokes man's Avatar
    Join Date
    Jul 2007
    Location
    Memphis
    My Bikes
    2008 Specialized Roubaix Elite Compact, 2004 Giant Cypress, 1981 Specialized Sequoia
    Posts
    246
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    After the upside-down pentrating oil treatment is allowed to soak, whack the stem bolt from the top. Try using a rubber mallet first. If that fails try using a hammer with a block of wood between the bolt and the hammer. Failing that, hammer directly.

  11. #11
    Senior Member
    Join Date
    Oct 2005
    Posts
    5,437
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Use a hammer impact wrench with a very clean hex bit.
    Il faut de l'audace, encore de l'audace, toujours de l'audace

    1980 3Rensho-- 1975 Raleigh Sprite 3spd
    1990s Raleigh M20 MTB--2007 Windsor Hour (track)
    1988 Ducati 750 F1

  12. #12
    Senior Member jnvw's Avatar
    Join Date
    Apr 2006
    Posts
    74
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I let it soak for about 15 to 17 hours. Nothing really changed. It appears that the Hex bolt is it the problem. It really just does not want to budge at all.

    So I am doen messing around with it and now decided to just cut off the stem. If anyone has experience with doing this let me know. I am thinking about it and if I simply cut off the stem the wedge and the rest of the stem will still be lodged in the fork, right.

  13. #13
    hello roadfix's Avatar
    Join Date
    May 2003
    Location
    Los Angeles
    My Bikes
    thank you for asking
    Posts
    18,502
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Instead of cutting off the stem why not torque the heck out the stem bolt and snap the bolt instead?

  14. #14
    vasracer
    Join Date
    Oct 2007
    Location
    NYC!!!!
    My Bikes
    Leader LD-735TR, Mercier Kilo tt, 3Rensho pursuit(not complete)
    Posts
    247
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Can the bolt and the stem be completely removed? If so remove the stem and the bolt, then thread the bolt back into the wedge. Using a hammer, hammer the bolt using it as a driver. You might ruin the bolt but replacements are relatively inexpensive. If you can't force it out try driving it farther down the steerer tube. This will enable you to use a new stem and have enough room to run it safely.

Posting Permissions

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