Piston markings:
1 - piston identification code;
2 — direction of piston installation;
3 — piston pin diameter class;
4 — piston class by diameter.
The inner diameter of the piston should be 19.993 - 19.999 mm.
Calculate the actual clearance using the formula: piston inner diameter - piston pin outer diameter.
The gap between the piston pin and the piston should be 0.002 - 0.006 mm.
Source link is located on (www.Renaultbook.ru)