"jerryl" wrote in message
...
Heat will make the bolt expand and just get tighter.


Conment to the above: The reason heat works is because the thermal
expansion distupts the bonds if corrosion between the mating threads.




Right. Heat will expand the bolt. When it's cherry red, pour cold water on
the bolt. It will contract rapidly and you'll be able to remove it with
very
little pressure then.



You do not need to quench the heated bolt with water, and you probably do
not need to heat the bolt to a cherry red. You are not heat treating here
all you are doing is disrupting the corrosive bonds.


--

Roger Shoaf

About the time I had mastered getting the toothpaste back in the tube, then
they come up with this striped stuff.