MWM Acteon Workshop Manual page 87

9.612.0.006.7160 - 05/04
Pistons and Connecting Rods
Install the device for piston assembly to close the
rings.
Note: Position the engine flywheel upward. This avoids
the contact of the connecting rod with the oil
injectors.
Carefully push the piston inside the cylinder. Never hit
directly on the top of the piston.
Lubricate the two inner halves of the bearing shells.