I once worked for a Dutch, Engine manufacturing Company Named Smit-Bolness. Their crankshafts were built. This enabled construction of the engine as a series of "G" Frames Thus it was easy to add or subtract a cylinder and the crankshaft components were a "one size fits all". Not only that, they could run on almost any kind of diesel... even crude itself.
Any of you our there from Liverpool who are old enough, will remember the suction dredger "WD Mersey". She was equipped with three such engines...totally amazing!