So I had a bit of time today to tinker with it a bit and my plan to this point before considering the engine scrap was to replace the 2 missing freeze plugs, add a bit of oil to each cylinder and if the engines turns smoothly manually then run a compression test on the cylinders.. As soon as I started to clean out the freeze plug holes I noticed a lot of metal shavings (see pic). I'm at a loss for why this stuff is in there.. It's very crumbly and "carbon-y"
Any ideas what this would indicate? If any significant amount of this ran through the circulator pump should I consider that toast as well? Curious if I could just flush this stuff out of the jacket and move forward or is it indicative or something bigger?