The crankcase is made from spheroid cast iron.The cylinders are formed directly in the crankcase and sorted into three size categories plus one oversize.The crankshaft is supported by five main bearings (1).Special channels in the crankcase walls carry coolant and lubrication fluid.The lower part of each cylinder contains a jet (2) that sprays oil onto the piston crown to cool it and to ensure the gudgeon pin is lubricated.
