Measuring Clearance Between Connecting Rod Bearing And Crankpin; Measuring Clearance Between Connecting Rod Bushing And Piston Pin - Mitsubishi S6S-Y3T61HF Service Manual

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.
Item Nominal
Crankpin ø 58 mm
outside diameter [2.28 in.]
Clearance between
crankpin and
connecting rod bearing
(oil clearance)
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.
Item Nominal
Bushing ø 30 mm
inside diameter [1.18 in.]
Clearance between
connecting rod -
bushing
Standard
57.955 to 57.970 mm
[2.2817 to 2.2823 in.]
0.030 to 0.090 mm
-
[0.0012 to 0.0035 in.]
Standard
30.020 to 30.045 mm
[1.1819 to 1.1829 in.]
0.020 to 0.091 mm
[0.0008 to 0.0036 in.]
INSPECTION AND REPAIR OF BASIC ENGINE
Measuring
directions
Measuring connecting rod bearing inside diameter
Measuring
directions
Limit
57.800 mm
[2.2756 in.]
0.200 mm
[0.0079 in.]
Limit
-
0.120 mm
[0.0047 in.]
Measuring connecting rod bushing inside diameter
Measuring
points
Measuring
points
Measuring crankpin diameter
Measuring
directions
54 ± 5 N·m
{5.5 ± 0.5 kgf·m}
[40 ± 3.6 lbf·ft]
Measuring
points
6-21