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Piston and connecting rod
General
The combustion chamber on the upper side of the
piston has a special ”swirl lip” to provide an effec-
tive fuel – air mixture. On the high effects the upper
side of the piston is turned to ensure clearance be-
tween the valves and the glow plugs.
The pistons have two compression rings and one oil
scavenger ring. The groove for the top ring is in a
hard metal insert to minimize the groove wear. Axial
guidance of the floating piston pins occurs using
snap rings. There is a steel insert in the piston man-
tle to check the pistons dilation.
The connecting rods are H section forged steel. The
bearing caps are located to the connecting rods us-
ing tight connecting rod screws with.
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