bolt popped?
+ Reply to Thread
Results 1 to 13 of 13

This is a discussion on bolt popped? within the Transmission & AWD forums, part of the Tech & Modifying & General Repairs category; i just installed my transmission mount today and when i was tightening down the 17mm bolt i heard a pop ...

  1. #1
    Registered User
    Join Date
    Nov 2012
    Location
    CT
    Posts
    106

    bolt popped?

    i just installed my transmission mount today and when i was tightening down the 17mm bolt i heard a pop and now it won't tighten or loosen.
    can i just ignore it or do i need to replace?

  2. Remove Advertisements
    ClubWRX.net
    Advertisements
     

  3. #2
    Work In Progress GRBOXR's Avatar
    Join Date
    Jan 2014
    Location
    Long Island, NY
    Posts
    92
    I Support ClubWRX
    When you say it wont tighten or loosen, is the bolt spinning in place or is it stuck (doesn't rotate either direction)?

  4. #3
    Registered User
    Join Date
    Nov 2012
    Location
    CT
    Posts
    106
    the bolt spins
    it takes a little effort to make it spin
    i can't do it by hand.

    the crossmember is still tight onto the frame

  5. #4
    Work In Progress GRBOXR's Avatar
    Join Date
    Jan 2014
    Location
    Long Island, NY
    Posts
    92
    I Support ClubWRX
    If I am not mistaken I believe the bolt you are referring to gets threaded to a welded nut. Sounds like the welds on that nut let go thus the spinning but not tightening nor loosening.

    I'm assuming the bolt was almost fully tightened when you heard the "pop" which would also explain why its difficult to spin the bolt. It may be tight at the moment, but you are at risk of it backing out over time. I would look into getting back there and tack welding the nut back on or finding another means of fully securing that bolt on.

  6. #5
    Registered User
    Join Date
    Nov 2012
    Location
    CT
    Posts
    106
    ok i'm not too sure how i'm gonna be able to do that *tack welding the nut* what other means are out there for me?

  7. #6
    zax
    zax is online now
    \_(ツ)_/ zax's Avatar
    Join Date
    Nov 2008
    Location
    Neverland Ranch, Maryland
    Posts
    13,464
    I Support ClubWRX I Support ClubWRX
    Quote Originally Posted by jling0311 View Post
    ok i'm not too sure how i'm gonna be able to do that *tack welding the nut* what other means are out there for me?
    You COULD use chemical weld, but I would seriously just have someone quickly tack-weld it.


    Did you use proper torque when tightening the nut?
    2015 CWP WRX STi ... But how did I get roped back into an EJ motor?!
    Zax's utterly unimaginably stock 2015 STi build thread
    Zax's Shaggin' Wagon Build Thread Now tuned for 99% pure Unicorn Jizz!

    Zach | Moderator -- Mid-Atlantic States, Tech & Modifying & General Repairs
    Rollin' with the Bugeye Mafia #302 | N.E.R.D. Subject Zero
    Facebook me here

    Your Mid-A local board: http://www.clubwrx.net/forums/mid-atlantic-states/

  8. #7
    Registered User
    Join Date
    Nov 2012
    Location
    CT
    Posts
    106
    it literraly popped close to 75ft-lb. how do even get access to that area to tack/chemical?

  9. #8
    Work In Progress GRBOXR's Avatar
    Join Date
    Jan 2014
    Location
    Long Island, NY
    Posts
    92
    I Support ClubWRX
    Unfortunately by making a hole through the inside of the car. If you can't/don't want to tack-weld the nut back on you could probably use a socket on the nut while you tighten the bolt, which if that's the route you choose to go I would use a lock washer. I recommend tack-welding it back on however.
    Last edited by GRBOXR; 04-04-2014 at 08:58 AM. Reason: spelling errors

  10. #9
    Registered User subypete's Avatar
    Join Date
    Jan 2008
    Location
    Decatur, IL
    Posts
    136
    Came here from your other thread.

    You said you were going to use anti-seize on your bolts... did you use anti-seize on the bolt that broke? If so, I'm guessing your bolt broke because it was over-torqued. Anti-seize, as the name indicate, prevents seizing... typically used with stainless steel hardware. However, it also acts as a lubricant. According to various anti-seize manufacturer specifications, bolt torque should be reduced by 15-30% when using anti-seize on a bolted joint that calls out a "dry" torque.

    So if whatever manual you were using to you to torque to 75 ft-lb, then you likely should have used a lower value - something like 53 ft-lb.
    2002 OBP WRX - Stage II - "Black Betty"
    1987 Subaru GL Wagon - Stock - "Mr. Ratburn" - SOLD

  11. #10
    Work In Progress GRBOXR's Avatar
    Join Date
    Jan 2014
    Location
    Long Island, NY
    Posts
    92
    I Support ClubWRX
    Quote Originally Posted by subypete View Post
    Came here from your other thread.

    You said you were going to use anti-seize on your bolts... did you use anti-seize on the bolt that broke? If so, I'm guessing your bolt broke because it was over-torqued. Anti-seize, as the name indicate, prevents seizing... typically used with stainless steel hardware. However, it also acts as a lubricant. According to various anti-seize manufacturer specifications, bolt torque should be reduced by 15-30% when using anti-seize on a bolted joint that calls out a "dry" torque.

    So if whatever manual you were using to you to torque to 75 ft-lb, then you likely should have used a lower value - something like 53 ft-lb.
    I don't think the bolt is broken, but the nut broke off as mentioned earlier in the thread. Even if the torque on the bolt should be reduced due to the use of anti-seize, 75ft-lbs would of been fine since the factory torque spec calls out for 103.3ft-lbs (27% less) 1610.pdf

  12. #11
    Registered User subypete's Avatar
    Join Date
    Jan 2008
    Location
    Decatur, IL
    Posts
    136
    Quote Originally Posted by WRX309 View Post
    I don't think the bolt is broken, but the nut broke off as mentioned earlier in the thread. Even if the torque on the bolt should be reduced due to the use of anti-seize, 75ft-lbs would of been fine since the factory torque spec calls out for 103.3ft-lbs (27% less) 1610.pdf
    You are absolutely right. On occasion, I am guilty of not reading the entire thread... even very short ones.
    2002 OBP WRX - Stage II - "Black Betty"
    1987 Subaru GL Wagon - Stock - "Mr. Ratburn" - SOLD

  13. #12
    Registered User
    Join Date
    Nov 2012
    Location
    CT
    Posts
    106
    update

    i didn't not use any anti seize on the bolts
    i had 2 separate body shops look at it and for now it's ok because the bolt is torqued down enough to hold *bolt unwilling to spin by hand* and i was told to keep an eye on it. they're looking to charge about 200-300 to fix this. is that a decent price or am i getting shafted?

    thank you guys for all the advice.

  14. #13
    Registered User
    Join Date
    Apr 2013
    Posts
    7
    Quote Originally Posted by WRX309 View Post
    I don't think the bolt is broken, but the nut broke off as mentioned earlier in the thread. Even if the torque on the bolt should be reduced due to the use of anti-seize, 75ft-lbs would of been fine since the factory torque spec calls out for 103.3ft-lbs (27% less) 1610.pdf
    FSM is wrong. The torque spec is actually 75 lbft.

+ Reply to Thread

Quick Reply Quick Reply

Register Now

Please enter the name by which you would like to log-in and be known on this site.
If you do not want to register, fill this field only and the name will be used as user name for your post.

Please enter a password for your user account. Note that passwords are case-sensitive.

Please enter a valid email address for yourself. We strongly suggest that you stay away from using aol, yahoo, msn, and hotmail accounts. Sometimes the mail server blocks the emails from our server. As a result you will not receive any notifications including the confirmation email.

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.


Posting Permissions

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