TM 5-3895-382-24
Connecting Rod
SMCS Code: 1218
Type 1 Engines and 9RM Engines
NOTE:
For a complete description of Type 1 and Type 2
engines, refer to the Specifications Module,
"Engine Design" for more information.
Illustration 44
Connecting Rod And Bearings
Naturally Aspirated Engines
(1)
Inside diameter of rod for
bearing ...............................................38.89 to 38.92 mm
(1.531 to 1.532 inch)
(2)
Outside diameter of bearing for piston
pin .......................................................38.94 to 39.03 mm
(1.535 to 1.536 inch)
Inside diameter of bearing for piston pin after
reaming ...........................................................34.940 to 34.960 mm
(1.3758 to 1.3765 inch)
Clearance between small end bearing and
piston pin ............................................................0.020 to 0.043 mm
(.0008 to .0017 inch)
(3)
Distance between center of piston pin and center of
crankshaft bearing ...........................219.05 to 219.10 mm
(8.624 to 8.626 inch)
(4)
Bearings are available for remachined journals of the
crankshaft
which
have
the
following
undersize
dimensions:
0.25 mm (.010 inch)
0.51 mm (.020 inch)
0.76 mm (.030 inch)
Shell thickness ..................................................1.835 to 1.842 mm
(.0723 to .0726 inch)
Width of connecting rod bearing ....................31.62 to 31.88 mm
(1.245 to 1.255 inch)
Bearing clearance ............................................0.035 to 0.081 mm
(.0014 to .0032 inch)
(5)
Inside diameter of rod for
bearing ...........................................................67.210 to 67.220 mm
(2.6460 to 2.6465 inch)
(6)
Connecting rod cap with nuts and bolts
Tighten the nuts for the connecting rod to the following
torque: ..................................................................125 Nm (92 lb-ft)
Connecting rod cap with bolts only
Tighten the bolts for the connecting rod to the following
torque: ............................................................... 155 Nm (114 lb-ft)
Turbocharged Engines
(1)
Inside diameter of rod for
bearing....................................................42.07 to 42.09 mm
(1.656 to 1.657 inch)
(2)
Outside diameter of bearing for piston
pin .......................................................42.160 to 42.190 mm
(1.6600 to 1.6613 inch)
Inside diameter of bearing for piston pin after
reaming ..........................................................38.120 to 38.140 mm
(1.5008 to 1.5015 inch)
Clearance between small end bearing and
piston pin ............................................................0.020 to 0.043 mm
(.0008 to .0017 inch)
(3)
Distance between center of piston pin and center
of crankshaft bearing .......................219.05 to 219.10 mm
(8.624 to 8.626 inch)
(4)
Bearings are available for remachined journals of the
crankshaft which have the following undersize dimensions:
0.25 mm (.010 inch)
0.51 mm (.020 inch)
0.76 mm (.030 inch)
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