well, I cut the pulley off. couldn't get a real good grip with the vise grips so I cut the bearing off. got the vise on would not turn, applied heat, would not turn.
cut a notch in the head, applied heat pounded with tiny sledge and chisel.
busted out the air chisel, applied heat. when all the dust settled the bolt remains intact.
only thing I can figure is the pulley was already replaced and they used thread locker.
I give up, I'm buying a new tensioner from rock auto
anything special I should know about replacing the tensioner?
pictures of the bolt that beat me ImageShack(TM) slideshow