No expert here but a finely sheared crank journal seems indicative of a metalurgical design problem.

The engines I examined were about three years ago and the operator customer is knowledgeable.

I have reached a point in life where anything that costs me lost flying time or wasted trips to the field is totally unacceptable. Its at that point that cheap engines become very costly indeed and I won,t go there.

I don,t care how much harrasment I get at times over spending my money on quality engines. Quality that I know is there simply because I have seen over the years as you that those engines deliver.

John