I'm an idiot. I snapped the STB stud!

[Skully]

The guys who snapped off the stud ... did you have a Performance Package car that came with the strut tower bar? Or did you add a strut tower bar to a car that never had one from the factory, and then snapped off a stud?

It's possible that particular stud was over tightened at the factory on PP cars, and that weakened the stud to later snap if the strut tower bar was removed and then reinstalled a few times and torqued to the 41 ft-lbs spec.

GT Premium Performance Pack from the factory. So, yes, that theory sounds very possible.

Also, if for example the studs ever got (too) hot during tack-welding them in they also are weakened.


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Picture from THE_AHJ's other topic that made be think... "Hmmmz those 2 out of the 3 tack-welds look a bit bigger than needed"

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[cking]

Big update here if those studs are spot welded in. The strut bar could be flexing a brittle bolt. When they break drill the spot welds out, put a bolt with washer in. They might beat out but if welds are deep it might roll in watch it.

 

[Dominant1]

Vet killed dog? sue vet win $$$$ buy a newer car rather then a fix for the bolt you broke!

 

[Ugly John]

I had the same problem, but on the driver side. See this thread:


http://www.mustang6g.com/forums/showthread.php?t=81846


Replacing the stud with a bolt works fine...

 

[Captdistraction]

Vet killed dog? sue vet win $$$$ buy a newer car rather then a fix for the bolt you broke!

This is the kind of mentality that keeps my wife (a DVM) up at night. Not every patient has a positive outcome. They have to make real tough decisions with the information they have at the time to provide the best care they can.

Malpractice happens, sure, but even more are the occurrences of people out for blood in cases where everything went by the book. (not at all implying the OP is in that situation).


I'm sorry to hear about the OP's loss. Pets are family

Car's fixable.

 

[GT Pony]

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.

 

[BoostedCanadianPoney]

Update: I ended up driling and replacing with a bolt from the bottom, it was an easy job. Thank you all for the advice

 

[gameovergt]

Update: I ended up driling and replacing with a bolt from the bottom, it was an easy job. Thank you all for the advice

I may end up having to do this.

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