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Radius Arm Brackets - Rivnuts


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#1 Algordo1100

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Posted 23 May 2020 - 05:40 PM

I've got the common problem of snapped radius arm bracket bolts on a rear subframe I'm working on. I drilled out the snapped bolts and the captive nuts came with it, so re-tapping is out.

What do we reckon to the strength of galvanized steel rivnuts in this application? Bearing in mind a failure of the bracket bolt anchor points is, shall we say, less than ideal.

#2 RustyAutoCityE

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Posted 23 May 2020 - 05:45 PM

To be honest, for me if I brought a Mini and found Riv-Nuts being used for that, I wouldn't feel comfortable driving the car until I "put it right".

 

They may well be fine/up to the job, but it wouldn't be for me.



#3 nicklouse

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Posted 23 May 2020 - 06:40 PM

no no no.



#4 cal844

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Posted 23 May 2020 - 06:43 PM

Do it properly, a riv nut in this location would fail an MOT in the UK due to improper repair.

#5 Algordo1100

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Posted 23 May 2020 - 09:55 PM

Hmmmm.
You're all right.
No time to bodge. I'll drop the subframe and do it properly

#6 Algordo1100

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Posted 23 May 2020 - 10:05 PM

Any ideas on how??
I only have a stick welder

#7 Avtovaz

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Posted 23 May 2020 - 11:00 PM

they are stronger than nuts in must cases! But you need the right hole size, etc etc. Also their a top hat so you need to allow for

that on the outside, which means what you are bolting to it needs a bigger hole.

 

Put nuts back in it, if it all goes wrong, you have done it as factory. itll be ok.



#8 nicklouse

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Posted 23 May 2020 - 11:15 PM

Sorry not stronger. Even when fitted to the correct size hole there is not much overlap and the subframe is getting to be the max thickness they could be fitted to.

They can be ok in some applications but not here.

#9 Avtovaz

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Posted 23 May 2020 - 11:17 PM

its not often i click the "see what nick said" option, and you are far wrong, im again glad for the forum option.


Edited by Avtovaz, 23 May 2020 - 11:19 PM.


#10 nicklouse

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Posted 23 May 2020 - 11:43 PM



its not often i click the "see what nick said" option, and you are far wrong, im again glad for the forum option.


here is an application in a non structural suspension ( i say non structural in that if it fails you will not really notice) also the loads are limited 

each body mount has 6 Rivenuts fitted (so 12) while the actual bush bearing only has one fixing. Also this is the only suspension application i have come across that uses Rivenuts. point to not the VW supplied ones were longer that the ones you would get from a hardware store as they were correctly sized for the thickness of the metal they were going into. and IIRC the fasteners were M6

eBVzqkb.jpg


 



#11 Avtovaz

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Posted 23 May 2020 - 11:54 PM

I have refreshed the forum, i have saw some reply. Please, do me one thing Nick, im sure your a nice guy, but just have nothing to do with me. you can post hunt , do what ever you want, i dont care, just have nothing to do with me. Part as friends. Thankyou, i you are well at this bad time.



#12 spraybeater

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Posted 24 May 2020 - 09:57 AM

Any ideas on how??
I only have a stick welder

If you are stuck I am quite willing to weld new nuts in for you! 

 

Happy to help anybody out, not withstanding controversial & social distancing issues. :nuke:  :lol:

 

PM me if you need help.






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