The gear ring is镶在flywheel outer edge after being heated, securing tightly to the outer edge upon cooling. It is used to mesh with the starter gear, driving the crankshaft to rotate and start the engine.

1) When starting the engine, the starter gear may collide with the flywheel teeth ring, or the teeth may not mesh properly, causing the ring to be damaged.

2) The starter's power connection was too early, causing the starter gear to collide with the flywheel teeth.