Pieces of steel in cylinder??

BTW, if the theory of the chunks in the cylinder forcing the crank against the bearings is right, then there ought to be a much thinner bearing area on the main bearing and on the #3 rod bearing in particular, based on how much soft stuff junk there is..... not quite seeing that on the mains as shown. No pix of that rod bearing.... so it may be really melted. (The OP is lettin' us down LOL)