Information Needed - K-Brace Bolt - Sheared Thread

Discussion in 'Suspension, Brakes & Chassis' started by RSPEC-015, May 1, 2017.

  1. THE_AHJ

    THE_AHJ AuthorityHvngJurisdiction

    First Name:
    Alberto
    Vehicle(s):
    16 Ingot Silver GT Premium PP
    Joined:
    Mar 3, 2017
    Location:
    562 ~ 714
    Posts:
    420
    Likes Received:
    85
    Rating:
    100%
    6   0   0
    YMMV but a punch and a decently weighted hammer gets the job done. I drilled a bit and thought it was a b*tch to do because I snapped a drill bit, so I used the punch to make a small hole again and something told me just give it a few good whacks......and boom, it popped out. IMG_1321.jpg
     
    Skully and RSPEC-015 like this.
  2. OP
    OP
    RSPEC-015

    RSPEC-015 Well-Known Member

    Vehicle(s):
    Ford Territory & Mustang GT
    Joined:
    Mar 18, 2015
    Location:
    Sydney, Australia
    Posts:
    1,020
    Likes Received:
    693
    0   0   0
  3. THE_AHJ

    THE_AHJ AuthorityHvngJurisdiction

    First Name:
    Alberto
    Vehicle(s):
    16 Ingot Silver GT Premium PP
    Joined:
    Mar 3, 2017
    Location:
    562 ~ 714
    Posts:
    420
    Likes Received:
    85
    Rating:
    100%
    6   0   0
    Your mileage may vary. Just means that it may not be/work for everyone. I guess do at your own risk.
     
    RSPEC-015 likes this.
  4. GT Pony

    GT Pony Well-Known Member

    Vehicle(s):
    2015 GT Premium, Black w/Saddle, 19s, NAV
    Joined:
    Mar 13, 2015
    Location:
    Pacific NW
    Posts:
    7,493
    Likes Received:
    1,931
    0   0   0
    What torque value were you using? I think the manual says those nuts are torqued to 41 ft-lbs. Maybe there was a defect in the stud that snapped off.
     
  5. GT Pony

    GT Pony Well-Known Member

    Vehicle(s):
    2015 GT Premium, Black w/Saddle, 19s, NAV
    Joined:
    Mar 13, 2015
    Location:
    Pacific NW
    Posts:
    7,493
    Likes Received:
    1,931
    0   0   0
    I was digging around looking at recommended torque values for metric fasteners. The strut tower studs are 10M x 1.50 (10 mm dia x 1.50 mm pitch). What I'm finding is that Ford's recommended torque value of 41 ft-lbs seems to be higher than the general information out there.

    It looks like based on Ford's torque spec that the studs are most likely Grade 8.8 (120K PSI) which is equivalent to a Grade 5 in US sizes. But Ford is recommending 41 ft-lbs where as most chart show it more like 35~37 ft-lbs.
    http://www.xrfchassis.com/images/PDF/Torque_Reference_Chart.pdf


    This reference shows 10M x 1.50 Grade 8.8 at 44 N-m, which is 33 ft-lbs.
    http://www.boltmasters.com.au/webfi...ters_Pty_Ltd_Recommended_Assembly_Torques.pdf

    After looking at this, I wouldn't torque the strut tower nuts over 33 ft-lbs ... probably shoot for 30 ft-lbs with clean dry threads.
     
    RSPEC-015 likes this.
  6. OP
    OP
    RSPEC-015

    RSPEC-015 Well-Known Member

    Vehicle(s):
    Ford Territory & Mustang GT
    Joined:
    Mar 18, 2015
    Location:
    Sydney, Australia
    Posts:
    1,020
    Likes Received:
    693
    0   0   0
    Sorry GTPony, I haven't visited this thread for a while. The Steeda instructions listed 33 or 34ftlbs, not sure which as I've sold that brace, but I torqued to 36 as I'd seen the Ford info at 41!

    I'm thinking along your lines that it was a defective stud. Going to be fixed soon at dealership (just waiting for the coilovers to arrive).

    I'll check the instructions with the GT350R brace that I got.

    Cheers
     
  7. GT Pony

    GT Pony Well-Known Member

    Vehicle(s):
    2015 GT Premium, Black w/Saddle, 19s, NAV
    Joined:
    Mar 13, 2015
    Location:
    Pacific NW
    Posts:
    7,493
    Likes Received:
    1,931
    0   0   0
    The GT350R and Ford Racing brace will show the strut nuts to be torqued to 41 ft-lbs, just like the Ford service manual. I'm going to play it safe, and torque mine to 30 ft-lbs based on what I'm seeing in various torque tables for a 10M x 1.50, Grade 8.8 bolt.
     
    RSPEC-015 likes this.
  8. gameovergt

    gameovergt Kevin

    First Name:
    Kevin
    Vehicle(s):
    2016 Ford Mustang GT(Auto) DIBM
    Joined:
    Jan 5, 2017
    Location:
    Jacksonville(The 'Burg)
    Posts:
    1,215
    Likes Received:
    335
    Garage Profiles:
    1
    Rating:
    100%
    4   0   0
    the 2 studs on the passenger side are stripped/thread is bad. Can the threads be retapped?
     
  9. cyclonetron

    cyclonetron Well-Known Member

    First Name:
    Patrick
    Vehicle(s):
    2016 Mustang v6
    Joined:
    Aug 2, 2018
    Location:
    Tennessee
    Posts:
    294
    Likes Received:
    143
    Garage Profiles:
    1
    Rating:
    100%
    1   0   0
    I followed your directions and they were great, however can you explain more how you tightened the bolt from underneath? The way I did it was very difficult. I had a hard time with the strut in the way.
     
Loading...

Share This Page