Prepare a mandrel for installing piston pins.
Lubricate the piston pins and connect the piston and connecting rod using hand pressure. The arrow on the piston head and the hole in the upper connecting rod head must be positioned according to the instructions.
Insert retaining rings into the piston bosses on both sides and check their position in the grooves.
Check the rotation of the piston relative to the connecting rod.
Use pliers to install the piston rings into the piston grooves, paying particular attention to the position of the two upper compression rings (see fig. 69). If there are no pliers, use the method shown in Fig. 70.
Fig. 69. Removing piston rings with pliers. To avoid ring breakage, do not spread the pliers wide
Fig. 70. Diagram of installation of piston rings on the piston.
Material based on data from the portal: MercedesMAN