The engine block is cast iron, with high
mechanical strength.The crankshaft is supported by means of
five main bearings (1).The cylinders are formed directly in the
engine block, and are graded into three sizes plus one oversize.There are special channels in the engine
block walls which allow the flow of coolant and lubricating oil.At the bottom of each cylinder, there is
a jet (2) from which oil is sprayed onto the piston crown to cool
it and ensure the lubrication of the gudgeon pin.