Piston markings:
1 - piston identification code;
2 - direction of installation of the piston;
3 - piston pin diameter class;
4 - piston class by diameter.
The piston inner diameter should be 19.993 - 19.999 mm.
Calculate the actual clearance using the formula: piston inner diameter - piston pin outer diameter.
The clearance between the piston pin and the piston should be 0.002 - 0.006 mm.