Head Honcho (Cylinder Head removal tool)

[Beans]

The main reason why the studs get stuck is contact corrosion between the steel studs and the alloy head.
All other problems just add up to it

[Hasbeen]

It could be Oz conditions Beans, or perhaps I have just been lucky, but there was no corrosion in the couple I have done. In fact one still had oil on the studs & one grease. Neither had run in some time, so it was not fresh oil or grease.

In both instances, once cracked, they screwed out by fingers. I was surprised at this, as all the posts about head removal had reported considerable corrosion.

Hasbeen

[Cobber]

You should be able to order high tensile allthread rod from an industrial fastener supplier that caters to the engineering industries.
It's where I get all my fastening hardware from.