TM 5-3895-383-24
Oil Control Ring
(6)
Install Oil Control Ring with the gap in the spring 180
degrees away from the gap in the ring.
Painted potion of spring must be visible at the ring end
gap.
Width of groove in piston for piston ring
(new) ........................4.041 0.013 mm (.1591 ± .0005 in)
Thickness of piston ring (new) .............3.982 ± 0.008 mm
(.1568 ± .0003 in)
Clearance between groove and piston ring
(new) ..................... 0.038 to 0.080 mm (.0015 to .0031 in)
Clearance between ends of piston ring when installed in
a cylinder:
3114 & 3116 with a bore size of 105.025 mm
(4.1348 in) ........................0.45 ± 0.15 mm (.018 ± .006 in)
3126 with a bore size of 110.025 ± 0.025 mm
(4.3317 .0001 in).................................0.379 ± 0.100 mm
(.0149 .0040 in)
3114 & 3116 increase in clearance between ends of
piston ring for each 0.03 mm (.001 in) increase in
cylinder bore size ....................................0.09 mm (.004 in)
3126 increase in clearance between ends of piston ring
for each 0.01 mm (.00040 in) increase in cylinder bore
size .........................................................031 mm (.00122 in)
After rings have been installed, rotate so end gaps
are apart ............................................................120 degrees
Piston Pin Bore
(7)
Pin
bore
diameter
in
piston
crown
bearing
.................................................................40.031 0.007 mm
(1.5760 ± .0003 in)
Pin
bore
diameter
in
piston
skirt
.................................................................40.020 0.008 mm
(1.5756 .0003 in)
Pin diameter ..........................................40.000 ± 0.005 mm
(1.5748 ± .0002 in)
Thoroughly lubricate pin with clean engine oil before
assembling to piston group and connecting rod.
Connecting Rod And Main Bearing Journals
Connecting Rod Bearing Journals
CONNECTING ROD BEARING JOURNAL
Original Size
70.000 ± 0.020 mm
Journal
(2.7559 ± .0008 in)
Undersize Journal
69.750 ± 0.020 mm
0.25 mm (.010 in)
(2.7461 ± .0008 in)
Undersize Journal
69.500 ± 0.020 mm
0.50 mm (.020 in)
(2.7362 ± .0008 in)
Clearance between bearing and journal
(new) ...............................0.053 to 0.155 mm (0.0021 to .0061 in)
Main Bearing Journals
MAIN BEARING JOURNAL
Original Size
90.000 ± 0.020 mm
Journal
(3.5433 ± .0008 in)
Undersize Journal
89.750 ± 0.020 mm
0.25 mm (.010 in)
(3.5335 ± .0008 in)
Undersize Journal
89.500 ± 0.020 mm
0.50 mm (.020 in)
(3.5236 ± .0008 in)
Clearance between bearing and journal
(new) .............................0.071 to 0.173 mm (0.0029 to 0.0068 in)
5-31
