(6) Replacing piston riDp If the rings are replaced, the gap width will exceed the standard value, but this is not a matter of concern, provided that the service limit is not exceeded. (7) Piston pin bosses Check the piston pin bosses by referring to the topic, Piston pins, piston pin bosses and piston pin bushings, which follows. Piston pins, piston pin bosses and piston pin bushings (1) Check the pin clearance in the pin boss of the piston by computing the difference between the two diameter readings, one taken on the pin and the other in the boss. If the computed difference (clearance) exceeds the repair limit, replace the piston pin with a new one. Specifications Unit:
mm (in) Miking piston pin bushing and piston pin (2) ('heck the clearance of the pin in the bushing fitted to the small end of the connecting rod by computing the difference between the two dia· meter readings. If the computed difference (clearance) exceeds the repair limit, replace the pin or the bushing whichever is badly worn.
Specifications ) -24- Item Standard Repair limit Piston pin diameter 0 25 -0.006 (0.984 8.00024 ) _ Item Standard Repair limit Piston pin boss ID 25 -8.006 (0.984 -8.00024) Piston pin clear- ance in piston pin boss 0-0.016 (0 - 0.00063) 0.05 (0.0020) Piston pin bushingID 25 +0.020 ·+0.045 +0.00079 (0.984 +0.00177 ) Piston pin clearance in piston pin bushing 0.020 - 0.051 (0.00079 - 0.00201) 0.08 (0.0031)