Ben S wrote:
> great advice guys..... can't believe i didn't think of it already!
> especially since i already got a replacement tin, so if i cut the old
> one out and notch the new one, i never even have to remove those
> bolts!!
>
> but i'd still kind of like to as a matter of principle.  would it be
> easier to get these out if i ran the engine for awhile and let
> everything get up to temperature??  i seem to recall that for any
> given type of metal the size of a hole will increase more than the
> size of a cylinder of equal diameter when subjected to an equal
> increase in temperature.... true???

Ben,
   you want the aluminum head cold when removing header bolts, spark
plugs, etc. to reduce the odds of damaging the treads.

Larry A.