Based on the limited amount of preliminary information I'd say this one broke a rod bolt. That would explain no rod knock and immediate failure.
I'd be happy to give you a free observation on what has occurred... I am only 75 miles away :-)
Looks like it's time for my version
(I also have one good used 2.5)
Sorry to hear, but as always I would like to understand which mode of failure you have experienced.. You didn't by chance have the BK deep sump did you?
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