Torch for loosening yer nuts

[byoshida@zygote.hsc.usc.edu (Benton Yoshida)]

>Instead of using an oxy/acetylene torch for those with a tighter budget I
>would like to suggest a mapp gas torch.  I got a canister of gas for $9 put
>it on my propane torch tip (even though they say no, everybody said it works)
>and I can get the exhaust nuts, as well as any other not too large bolt/nut,
>red hot (a lug is about the limit for bright red, after a few min).  This
>works great for removing exhaust manifolds and other rusted things.  and if
>you get a nice tip, with a bonus igniter, you get a even hotter flame for
>only $30 more.  I have never rented a oxy/acetylene torch but I would think
>one or two rentals would equal this cost.  BTW locally I can get these at
>Napa/home depot/sears type stores, all my cost figures are from Napa.  They
>are very nice to have around, I have become dependant on it.
>
>-Kyle
>--


How exactly is heat used for loosening parts?  Do you heat everything to
red, then put a wrench to it?  For instance, if there is a stubborn nut, do
you heat only the nut and try to keep the bolt cool?  What about frozen
studs?  And is this the lastest resort after the penetrating oil lets you
down?

Thanks, benton-----


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