Results 1 to 9 of 9
  1. #1
    JPR's Avatar
    Join Date
    Mar 2007
    Location
    Down under
    Posts
    934
    +1
    53

    Crank case bolt removal

    Any ideas on how to remove a crank case bolt that the head of the bolt has twisted to a spiral ?


  2. #2
    suck my wake's Avatar
    Join Date
    Apr 2006
    Location
    Sugar Grove IL
    Posts
    2,872
    +1
    12
    Start drillin!!! You can start with small bits and work your way up till you basically drill the head of the bolt off then when you get the case's apart you can use some vise grips to remove the rest of the bolt. It's a PITA but it works. Goodluck

  3. #3
    JPR's Avatar
    Join Date
    Mar 2007
    Location
    Down under
    Posts
    934
    +1
    53
    Aww man, I was hoping there was a better way ! Thanks for the reply.

  4. #4
    suck my wake's Avatar
    Join Date
    Apr 2006
    Location
    Sugar Grove IL
    Posts
    2,872
    +1
    12
    Is it one of the outer case bolts or one under the plug? If it's an outer you can use a cutoff wheel to get most of the bolt head off but if it's under the plug then the drill way is the only way I would do it.

  5. #5
    JPR's Avatar
    Join Date
    Mar 2007
    Location
    Down under
    Posts
    934
    +1
    53
    I wish it was an outer ! Was thinking of heating it up and smacking on a size down torx socket but am worried the heat will disturb the case. Drilling may b my best option..

  6. #6
    West Texas RXP skoepp's Avatar
    Join Date
    Oct 2007
    Location
    west texas
    Posts
    12,019
    +1
    149
    That sucks, been there done that.
    I tried everything imaginable and ended up having to drill it out, was a total pain in the axx.
    Do what ever possible to start the first bit in the middle of the bolt.


    All i can say as whenever you try break loose the main case bolts always use a brand new or perfect socket that is high quality with good bite and apply alot of pressure to be sure does not slip even once.

  7. #7
    JPR's Avatar
    Join Date
    Mar 2007
    Location
    Down under
    Posts
    934
    +1
    53
    Cheers fellas. A 11mm socket was my friend along with a hammer but it's ok the socket survived !!!!!

  8. #8
    West Texas RXP skoepp's Avatar
    Join Date
    Oct 2007
    Location
    west texas
    Posts
    12,019
    +1
    149
    Quote Originally Posted by jaffabas View Post
    Cheers fellas. A 11mm socket was my friend along with a hammer but it's ok the socket survived !!!!!
    Glad that worked out for you.
    Sounds like it luckily wasn't totaly rounded off.
    That bolt is a pita when gets striped.

  9. #9
    Nonstop, all day, everyday. 01xdime's Avatar
    Join Date
    Aug 2005
    Location
    Pasadena, MD
    Posts
    3,682
    +1
    1
    Good lord please dont talk about this! I have an engine to tear down this week and i've been breaking bolts like it's going out of style. Mostly Yamaha. WTF do they do to their hardware?

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. 07 215 4-tec Crank case bolts reuse?
    By synergy141 in forum 4-Tec Performance
    Replies: 2
    Last Post: 04-13-2015, 08:21 AM
  2. crank case bolts
    By cyrillefrenchy in forum 4-Tec Performance
    Replies: 9
    Last Post: 10-21-2014, 03:12 AM
  3. Crank case or remove oil injector?
    By Florey4 in forum Polaris Open Discussion
    Replies: 1
    Last Post: 07-11-2013, 09:48 PM
  4. 8 crank case bolts?
    By MR MAC in forum 4-Tec Performance
    Replies: 6
    Last Post: 08-23-2010, 07:48 AM
  5. WTB crank case bolts 66V & 66E
    By J-ME in forum Yamaha Classifieds
    Replies: 0
    Last Post: 05-19-2008, 11:35 PM

Posting Permissions

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