Starting the third rebuild !!!
I found a good German offer of a redone engine block painted in black.
86.5mm rebored and balancing shafts removed.
The crankshaft was controlled and polishing the crank pins.
With the advice of Gil-lig I measuring clearance gap between the crankshaft and the bearings of rods:
Gap is within the constructor tolerances so I can continue.
I think, on previous build I had reversed the direction of connecting rods and also dispatch them not in order with their conrods.
As Vocky said to me : surely the main cause of my blocked engines.