Piston with connecting rod
1 - piston;
2 - piston pin;
3 - connecting rod;
4 - connecting rod cover;
5 - liners;
6 - connecting rod cap nut;
7 - location of the label;
8 - groove for the oil scraper ring;
9 - groove for the second compression ring;
10 - groove for the upper compression ring.
Piston marks
1 - size group label;
2 - label «in front of the engine».
Pistons with connecting rods - assembly
Pistons and connecting rods are supplied separately and, if the cylinder block has been bored, pistons with rings and pins of the appropriate repair size must be purchased.
Caution: The piston pin holes in the pistons are offset and it is important that when connecting the piston to the connecting rod, the mark on the piston head matches the mark on the connecting rod.
The finger must be prepared in advance for assembly.
When checking, the finger should fit snugly into the piston bosses with the force of the thumb.
Before directly assembling the piston with the connecting rod, put the piston pin and the guide sleeve on the holder, securing it with a bolt. The bolt must not be overtightened to avoid jamming.
Install the piston with the connecting rod on the tool prism.
Note: Piston and connecting rod alignment marks must be on the same side.
Insert your finger into the desired position with the tool of your choice. After pressing, check the correct installation of the pin, and also lubricate the pin through the holes in the piston bosses.
To check that the piston is assembled correctly with the connecting rod, tilt the connecting rod at a slight angle so that the piston head drops under its own weight.
Typical checking of connecting rod assembly with piston
If you are using old fingers, then they must be checked for wear (arrows in fig. top right).