corrado vr6
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posted on 11/6/10 at 09:57 PM |
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p****d off!!
Was showing off my build to a mate today, decided to take it for a spin on private land as not tested yet, and the lower wishbone ball joint lock nut
failed which allowed the wishbone to drop down and the mounting bolts holding the ball joint to the wishbone then scored a nice groove on the inside
of my wheel as the wheel was still turning arrrrgh!
Anyhow now ive calmed down and had a beer or three i thought id ask on here as to possible reasons or if its ever happend to anyone else, i know i had
tightend the nut as i had just fitted my front arch brackets i know i used locktite and i used the supplied locknut, having looked at the nut i can
see all the threads have been stripped as if the bolt has just been under so much pressure and just pushed its way out the threads. Could
overtighening the nut have caused it to fail?
As you can imagine i think my mate was laughing on the inside
http://r1indy7.wordpress.com/
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madteg
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posted on 11/6/10 at 10:04 PM |
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Sound like it to me, better it failed now than when you are doing 100MPH.
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corrado vr6
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posted on 11/6/10 at 10:06 PM |
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quote: Originally posted by madteg
Sound like it to me, better it failed now than when you are doing 100MPH.
exactly what i said at the time, puts me off driving it now incase anything else goes pop!
http://r1indy7.wordpress.com/
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AdrianH
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posted on 11/6/10 at 10:09 PM |
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I would have though possibly over tightend. Just done a Haynes check for the Sierra and got 48 to 63 lb ft torque setting.
I have not heard this type of failure before. Sorry but glad you OK.
Adrian
[Edited on 11-6-10 by AdrianH]
Why do I have to make the tools to finish the job? More time then money.
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daviep
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posted on 12/6/10 at 12:54 AM |
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Sounds strange normally it is very difficult to remove the ball joint from the upright once it has been tightened.
Are you sure you have the correct ball joint and correct nut?
Regards
Davie
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eznfrank
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posted on 12/6/10 at 05:36 AM |
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Had the nut been re-used a few times?
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cliftyhanger
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posted on 12/6/10 at 06:40 AM |
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Re-use wouldn't strip a thread, but may eventually cause it to lose the nyloc-iness and undo.
I suspect overtightening or if it is a repro part off ebay or somewhere a poor quality nut...
I would be inclined to change any similar supplied nuts, and maybe spend a few hours double checking the rest. Time that should re-assure you
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Stuart_B
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posted on 12/6/10 at 06:48 AM |
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sorry to here that greg.
possibly over tighten or a bad batch??
stuart
black mk indy, 1.6pinto on cbr600 bike carb's.
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designer
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posted on 12/6/10 at 06:51 AM |
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I've never heard of a nut failing, coming loose maybe, but failing!
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Mark G
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posted on 12/6/10 at 08:08 AM |
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Is that the taper on the hub that needs to be modified? If so, have you had your's done?
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mistergrumpy
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posted on 12/6/10 at 08:36 AM |
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I took the nut off and wheeled the car out of the garage without remembering and it happened. Nice big scrape on the inside of the wheel
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BenB
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posted on 12/6/10 at 08:56 AM |
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The nut on my top wishbone BJ fell off and I was a three wheeled car until I managed to pull over. I think I hadn't done that one up. A good
trick is to get a Tippex marker pen and draw a line down the side of the BJ thread and nut. Then you can quickly do a visual check of all the nuts
before you set off. That's what I do now anyway......
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40inches
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posted on 12/6/10 at 08:57 AM |
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quote: Originally posted by Mark G
Is that the taper on the hub that needs to be modified? If so, have you had your's done?
+1
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austin man
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posted on 12/6/10 at 09:34 AM |
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I drilled mine and fitted a split pin as a secondary measure
Life is like a bowl of fruit, funny how all the weird looking ones are left alone
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emsfactory
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posted on 12/6/10 at 11:18 AM |
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The girfriend had a tyre changed by a garage.
They had put the whell nuts on with an impact driver way too tight. When she hit a pothole, as she does quite regulary it ripped the threads off 2 of
the 4 nuts.
Could be the same thing,
too tight and then a shock causing shear.
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Paul TigerB6
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posted on 12/6/10 at 12:09 PM |
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I'd think another potential cause of the stripped threads would be you've simply cross threaded it and tightened it up like that.
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corrado vr6
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posted on 12/6/10 at 12:37 PM |
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quote: Could be the same thing,
too tight and then a shock causing shear.
I did hit a bump when it happend! There is also a possibility it was a cheap joint off eBay can't remember which side I replaced, I didn't
think I cross threaded it but who knows. Obviosly I now need a new ball joint as although the threads on the bolt part look ok I don't trust it
where would be a good place to get a new one that will be of good quality?
http://r1indy7.wordpress.com/
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Mark G
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posted on 12/6/10 at 02:31 PM |
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As long as you torque it up correctly any should be ok as the car weigh's so little and they're designed for much heavier loads.
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