Was that crank modified by anyone? If so it could have been weakened
There are 2 of them, these two still have the crankshaft in one piece

what will be the engine running temp?

one of the broken engines was in Mallorca (20 degrees more or less). Maybe it was a coincidence, maybe not (the engines broke in Madrid, Mallorca, Valladolid...different places separated with a lot of kilometres and very different temperatures)