【6-22】
NGINE
Piston pin and pin bore
ID of Piston hole for Pin
● Clean Piston hole for Pin.
● Measure ID in the up and down direction and the right angle
direction with dial caliper gauge.
ID of Piston hole for Pin
Service limit 23.030 mm
Piston Pin OD
● Check for ware and damage on the sliding surface.
● Measure OD at total 3 positions; both ends and middle position in
the X- and Y-direction.
Piston Pin OD
Service limit 22.980 mm
CONNECTING ROD
Small end ID
● Check for ware and damage on the sliding surface.
● Measure ID in the X- and Y-direction with caliper dial gauge.
Small end ID
Service limit 23.040 mm
Connecting rod deflection
● Wear of the big end of the rod can be estimated by checking the
movement of the small end of the rod.
● This method can also check the extent of wear on the rod’s big end.
Connecting Rod deflection
Service Limit 3.0 mm
Side-clearance at large end of Connecting Rod
● Measure the side-clearance at large end of Connecting Rod with
thickness gauge.
Side-clearance at large end
Service Limit 1.0 mm
Runout
● Set on the V-block and measure runout with dial gauge.
Crankshaft Runout
Service Limit 0.08 mm
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