As an aside, we had a piston break in our work truck last month. It scored the wall slightly, but mostly left residue. We ordered a new piston and a dial bore gauge, and cleaned the cylinder up with a wiper hone and a drill. This hole was slightly smaller than the other ones, so were able to open it about .001" and get all the scoring out except one tiny spot about .25" long. Did a compression test after it was back together, and that one is higher than all the other.
I find it ironic that we're beating a $100k hone machine with a wiper hone and drill.
I find it ironic that we're beating a $100k hone machine with a wiper hone and drill.