To see extreme examples of this, look at any wallowed-out/wallered-out through-bore in construction equipment (e.g. excavator buckets), particularly when a pin

To see extreme examples of this, look at any wallowed-out/wallered-out through-bore in construction equipment (e.g. excavator buckets), particularly when a pin hasn't been greased, or is seized. This same scenario combined with the amount of vibration and stresses caused by the engine, should scream "this is a catastrophe waiting to happen" for any engineer.