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View Full Version : Front power brace torque specs + stripped weld nut frame


Moore
02-13-2017, 01:28 PM
Hi, I am looking for some clarification on the torque specs for the front traction arm braces.

I took mine off to build my own power brace. During reinstall I was following my version of the FSM which shows 108-127 (80-90ftlbs) End up stripping the weld nut in the frame rail on my driver side, didn't get to tightening the other bolts.

Cut an access panel in the frame rail, drilled out weld nut and dropped in a grade 10 M10 bolt to replace the weld nut, started torquing a nut on from the opposite side to clamp the brace in place. Stripped the nut, started thinking is is a lot of torque for an M10. Looked up bolt torques and indeed saw that maximum torque for is 60-70 ftlbs, with grade 12 hardware.

http://www.gtsparkplugs.com/bolt-torque-chart-metric.html

Then found this thread where he is posting a picture from a fsm showing bolts are 39-49 which matches the sway bar bolts, but then his power brace comes showing the higher torque loads.

http://forums.nicoclub.com/nismo-power-brace-wrong-torque-spec-t236429.html

So what do you torque it down too? I'm pretty close to just welding this thing back on.

[240sx]
02-13-2017, 02:50 PM
Tightened my nismo brace to the suggested specs(80ftlb) since I found nothing online that nismo's numbers were wrong. It worked out, but the anxiety reached bomb diffusal levels.😅

Sent from my SM-G930P

Moore
02-13-2017, 03:29 PM
I find that concerning as well though. If I do get new hardware and successfully torque it to 80ftlb it's beyond the bolts limit which could potential cause the bolt to fail when added stress is applied during cornering.

snorkelcoupe
02-13-2017, 03:56 PM
I'd suggest you weld in a new nut. The previous owner did the same as you and after miles it worked itself around in the frame and made a mess for me to fix. Might be less likely to happen with a power brace. I'm not sure on the torque specs.

derass
02-13-2017, 09:07 PM
From the 91-94 FSM. I assume S14 is similar.

http://i.imgur.com/4CPg3Tw.png

Moore
02-14-2017, 10:34 AM
Great thank you for posting that, I like that spec better then the one I have. Odd that there seems to be two versions out there.