[Vwdiesel] questions about re-using stretched bolts

Area31 Research Facility stephensrw at stn.net
Tue Oct 11 01:54:46 EDT 2005

Can anyone answer these two questions about bolt metalurgy?

I was wondering how a mechanic might know if the head or  rod bolts he has
have been used and stretched before when using them in an engine

I'd also like to know if one has known used bolts,  can heat treasting make
them as good as new again to be re-stretched?  I'm thinking of the process
involving heating in an oven to the correct color and then quenching in oil
or air and then reheating to temper.

Thanx for any discussion.


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