The connecting rods are of hardened and
tempered steel, with copper bush (1) in which the gudgeon pin (2) fits.The floating gudgeon pins are secured by
two circlips (3) seated in specific grooves in the piston skirts.
PISTONS
The aluminium-silicon alloy pistons with
autothermic inserts (1) are graded into three sizes; to ensure correct assembly,
an arrow is stamped on the crown to show the direction of rotation
of the engine. The piston crown is concave and has four
notches to prevent interference with the valve heads.
CYLINDER LINERS
They are made from cast iron and are the
type which are supported at the bottom with the coolant fluids coming
into direct contact from the outside for a more even dissipation
of the heat (when wet).When refitting the engine, check that the
projection of the cylinder liners/bores in relation to the cylinder block/crankcase
is within the recommended values.