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Old 03-19-2015, 11:58 PM   #1
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Stripped Stanchion Arm Capture Nut..FML

The threads were always sketchy and I guess this was the final straw. I tightened home the rear-stanchion arm bolt where it secured the rear of the subframe and heard a "tink" whereupon the bolt and threads simply fell out of the car. I was thinking that the best solution would be to get a grade-8 14X2 thread-pitch bolt to replace the 12X1.5 OE bolt. Will the capture-nut tolerate being drilled and tapped for a 14mm bolt? Does anyone have a better idea? I know I could helicoil, but, I don't like that stock bolt; the threads are too fine for all the sand and bullshit that gets tossed into that cavity.
#Saabbeingdumb
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-Cm
P.S major consideration must be made for the fact that a helicoil requires a special drill and tap size. I don't want to buy this crap when I already have a 14X1.5-2 tap and die.
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Old 03-20-2015, 06:56 AM   #2
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If you can get to the nut, hit it with an impact hammer and knock it out. Get a longer proper grade nut and bolt set and replace it.
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Old 03-20-2015, 07:02 AM   #3
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I can't picture it. Is this the one that someone posted having to cut holes in the floor to get to?

I don't see what you'd have to lose by trying to drill/tap. worst-case; you have to do what was suggested, which is knock off the old nut and tack another one down.
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Old 03-20-2015, 12:21 PM   #4
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Quote:
Originally Posted by g96nt View Post
I can't picture it. Is this the one that someone posted having to cut holes in the floor to get to?

I don't see what you'd have to lose by trying to drill/tap. worst-case; you have to do what was suggested, which is knock off the old nut and tack another one down.
Yup
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Old 05-12-2015, 03:30 PM   #5
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Did you resolve this? Same thing happened to me today
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Old 05-12-2015, 05:01 PM   #6
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The captured "nut" is simply a thick round "slab" of metal.

About 10mm thick and 25mm across. Is welded to the body with three (yea,just three) spot welds.

With plenty of cutting oil, a sharp tap and careful pressure, it should be possible to thread for either a threaded insert or simply upsize the bolt.

I've gone through the floor on a couple 9-3's when the spot welds have broken. Not a whole lot of fun!

I've used this sketch, but always seem to be "low" by an inch or so:

If you do go through the floor, think I'd try using a long drill bit and drill up from under to best ID the center of the hole needed to get into the area.

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Old 05-12-2015, 05:50 PM   #7
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Mine is on the drivers side. I'm thinking of re welding the original nut back on
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Last edited by WSW; 05-13-2015 at 10:14 AM.
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Old 05-15-2015, 02:44 PM   #8
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Welds on the nut broke so I rewelded it and jb welded the backside as I couldn't reach back there with the welder



Then I start screwing in the bolt and it won't tighten all the way, bull the bolt out and the top threads were pretty jacked up, ordered up 2 new bolts. Installed a new bolt and all is good now. I'm definitely going to start keeping spares of these bolts

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