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In Reply to: Re: Truth on M5 caliper rebuilds...(sorry for leng posted by Neil Deshpande on October 31, 2001 at 22:48:16:
I spoke with a few of my friends who work with materials and are engineers and they all seem to think the bolts should not be torque to yield. I guess the rebuild would be as you say in that case. What is their torque spec?
Neil Deshpande
http://www.neilwerke.com
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So I am generating quite a bit of heat. If the bolts were stretch bolts, then I would have had massive leaks by this point or have snapped the bolts. This is definitely not the case. Just because it is a shouldered bolt does not mean that it is a stretch bolt. Plus, if you know about materials science, you will realize that using a stretch bolt in an exceedingly high temp. application is pointless. This is beacuse when you stretch the bolt into the plastic deformation region you significatly change the strength characteristics of the bolt, the bolt is less resistant to temperature change under load and is more likely to fail. If you used a stretch bolt in this application then you would have fluid leaks whenever using the brakes hard and getting them hot. And remember that the calipers get hotter than the motor, so comparison is not valid reasoning. And brake part cleaner can be used during rebuilding because you will remove all of the rubber seals.
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