I can't recall ever hearing of a flywheel coming apart except under the harshest of racing conditions. I've hear of chipping teeth off the flywheel by trying to start the car while the engine was running. Do you ride the clutch at all. I would imagine it would get really hot that way, and that's when things have a tendency to come apart. Is there a possibility they broke the flywheel at the dealership why they were removing it?

Bob M