I’ve got more questions than answers, but I’ll give it a try. My first questions are for the dealer.
Why are you saying the shorted clutch caused the engine failure? This would be a first for me.
What exactly was the engine failure? Broken rod, crank seizure, scored cylinder, etc.
How did you come to this diagnosis? Hole in block, discolored bearing, broken cam, etc.
Oil can tell you that a bad clutch caused the problem? This mechanic is psychic!!!