p220sigman wrote:
They should be able to scope the cylinder to see the piston and cylinder walls. I still can't believe a bent valve wouldn't leave some kind mark/evidence in the cylinder and/or on the piston itself. Pictures of that kind of damage would probably help push the bar over to your side for a new engine.
If they will let you near the engine it might be worthwhile to get a scope if the dealer won't let you use his. Harbor Freight has one for $75. That might be a small investment after all that you have been through. https://www.harborfreight.com/Digital-Inspection-Camera-62359.html