Service Manual

INSPECTION AND REPAIR OF BASIC ENGINE
6-21
4.8 Measuring clearance between connecting
rod bearing and crankpin
CAUTION
When grinding crankpins, be sure to grind all the pins
to the same size.
Finish the fillet radius to the specified dimension.
(1) Reassemble the bearing into the big end of the
connecting rod.
(2) Tighten the connecting rod cap bolts to the specified
torque.
(3) Measure the inside diameter of the connecting rod
bearing.
(4) Measure the outside diameter of the crankpin.
(5) Calculate the clearance from the difference between the
inside diameter of the connecting rod bearing and
outside diameter of the crankpin.
(6) Replace the connecting rod bearing if the clearance
exceeds the limit.
(7) Measure the clearance between the connecting rod
bearing and the crankpin again. Use the undersize
bearing if the limit is exceeded.
(8) If an undersize bearing is used, grind the crankpin to
the specified undersize.
Measuring connecting rod bearing inside diameter
Measuring crankpin diameter
4.9 Measuring clearance between connecting
rod bushing and piston pin
Measure the inside diameter of the connecting rod bushing
and the outside diameter of the piston pin. Replace if the
limit is exceeded.
Measuring connecting rod bushing inside diameter
Item Nominal Standard Limit
Crankpin
outside diameter
ø 58 mm
[2.28 in.]
57.955 to 57.970 mm
[2.2817 to 2.2823 in.]
57.800 mm
[2.2756 in.]
Clearance between
crankpin and
connecting rod bearing
(oil clearance)
-
0.030 to 0.090 mm
[0.0012 to 0.0035 in.]
0.200 mm
[0.0079 in.]
Measuring
directions
Measuring
points
54 ± 5 N·m
{5.5 ± 0.5 kgf·m}
[40 ± 3.6 lbf·ft]
Measuring
directions
Measuring
points
Item Nominal Standard Limit
Bushing
inside diameter
ø 30 mm
[1.18 in.]
30.020 to 30.045 mm
[1.1819 to 1.1829 in.]
-
Clearance between
connecting rod
bushing
-
0.020 to 0.091 mm
[0.0008 to 0.0036 in.]
0.120 mm
[0.0047 in.]
Measuring
directions
Measuring
points