Page 1412 - Workshop Manual - Tunland (2017)

15-76 ENGINE MECHANICAL - PISTON & CONNECTING ROD ASSEMBLY

(b) Remove the oil ring and oil ring sleeve ring.

CAUTION

• The disassembly and installation of the oil
ring assembly can only be operated
manually.
• Place the piston rings in the correct order.

15

9 . Check the piston pin oil film clearance:

(a) Measure internal diameter of the connecting
rod small end bush with a calipers.
Internal diameter standard value: Minimum:
34.54mm maximum:

Minimum: 34.54mm
Maximum: 34.56mm

CAUTION

• Pay attention to avoid oil passages when
measuring.

(b) Measure the diameter of the piston pin with
an outside micrometer.
Diameter standard value:
Minimum: 34.494mm

Maximum: 34.50mm

(c) Subtract the piston pin diameter from the inside diameter of the connecting rod small
end bush to calculate piston pin oil film clearance.
CAUTION

• If the piston pin oil film clearance exceeds the maximum value, replace the
connecting rod small end bush, or replace the whole set of piston and piston
pin if necessary.

10 . Check the piston oil film clearance: