I've tried breaking the block with a sledge. No go.

I read somewhere about using a welder to run a few beads inside to shrink the sleeve and pull it. Haven't tried it yet.



Have wondered how hard it would be to cut through it with a band saw, then pop the sleeve loose.

Cutting torch seems easiest as suggested by easyrecycle.

If heating the entire block would get it out, then I would think putting it in an old oven would work? Unless it needs to be hotter than that.