1. Using a special tool, remove the ledge at the top of the cylinder caused by wear and combustion deposits.
2. Turn the engine over with the crankshaft facing up.
3. Using feeler gauges, measure the side clearance of the connecting rods. If the clearance exceeds the limits, the connecting rod must be replaced. If you have any doubts, please contact a specialist.
(Text taken from an online platform: MazBook.ru)
4. If the connecting rods and caps are not numbered, number them.
5. Unscrew the mounting nuts and remove the first connecting rod cover and bearing shell.
6. Place pieces of rubber tubing over the connecting rod bolts to avoid damaging the crankshaft journal and cylinder walls.
7. Remove the bearing shell and take out the connecting rod together with the piston.
8. Remove the remaining connecting rods and pistons in a similar manner.