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I know of one other owner who discovered - not that the bolt heads had snapped off - but simply that the nuts had backed off. I'm talking about the two upper a-arm mounting bolts. One of his bolts was completely missing and the other had no nut on it at all.
 

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MitchT said:
Nut and bolt the suspension before tracking.
And do the same to your wife before you head out to the track for the weekend.

xtn
 

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OOOOH

The owner I mentioned previously had problems with the top wishbone to chassis bolts. Not the same issue.
 

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I'm really glad that happened on what appears to be a closed track, but if you don't stop calling them upper control arm bolts I might change my mind....

Chris said:
Google finally finished processing the Video, here is the link.

This is the video of my upper control arm bolts breaking off mid-corner. It happened in June 2006 at the Dunnville Autodrome.

http://video.google.ca/videoplay?docid=-8857507290621297172&hl=en-CA
 

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cudacharlie said:
If the bolts that failed were the ones that are removed in order to remove the camber shims, I was told by my Lotus service man that these are one-time-use only, and must be discarded after removal, always being replaced with a fresh set.

Don't know if this applies, but....
Those are the correct bolts. The service manual does not call for replacement.
 
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