Main Bearing Fitting Chart; Fabricated Upper Main Bearing Removal Tool - Jeep J-10 Series 1982 Technical & Service Manual

1B-58 ENGINES
BEND HEAD TO FOLLOW
CONTOUR OF JOURNAL
NOTE: The O.Ol2-inch undersize insert is not used in
production.
Removal
(1) Drain engine oil.
(2) Remove oil pan.
(3) Remove main bearing cap and insert.
(4) Remove lower insert from bearing cap.
(5) Loosen other bearing caps and insert small cot
ter pin in crankshaft oil hole. Fabricate cotter pin as
illustrated in figure 1B-92.
(6) With cotter pin in place, rotate crankshaft so
that upper bearing insert rotates in direction of its lock
ing tab.
7/64-INCH COTTER PIN
60763
Fig. 1B-92 Fabricated Upper Main Bearing Removal Tool
Main Bearing Fitting Chart
Crankshaft No. 1 Main Bearing
Journal Color Code and
Diameter In Inches (mm)
Cylinder Block No. 1 Main Bearing
Bore Color Code and
Size In Inches (mm)
Bearing Insert Color Code
Upper Insert Size
Lower Insert Size
Yellow -
2.5001 to 2.4996 (Standard)
(63.5025 to 63.4898mm)
Yellow - 2.6910 to 2.6915
(68.3514 to 68.3641mm)
Black - 2.6915 to 2.6920
(68.3641 to 68.3768mm)
Yellow — Standard
Yellow — Standard
Yellow — Standard
Black - 0.001 -inch
Undersize (0.025mm)
Orange —
2.49S6 to 2.4991 (0.0005 Undersize)
(63.4898 to 63.4771mm)
Yellow - 2.6910 to 2.6915
(68.3514 to 68.3641mm)
Black - 2.6915 to 2.6920
(68.3641 to 68.3768mm)
Yellow — Standard
Black - 0.001-inch
Undersize (0.025mm)
Black - 0.001 -inch
Undersize (0.025mm)
Green - 0.002-inch
Undersize (0.051mm)
Black -
2.4991 to 2.4986 (0.001 Undersize)
(63.4771 to 63.4644mm)
Yellow- 2.6910 to 2.6915
(68.3514 to 68.3641mm)
Black - 2.6915 to 2.6920
(68.3641 to 68.3768mm)
Black —0.001-inch
Undersize (0.025mm)
Black -0.001-inch
Undersize (0.025mm)
Black — 0.001-inch
Undersize (0.025mm)
Green — 0.002-inch
Undersize (0.051mm)
Green —
2.4986 to 2.4981 (0.0015 Undersize)
(63.4644 to 63.4517mm)
Yellow- 2.6910 to 2.6915
(68.3514 to 68.3641mm)
Black —0.001-inch
Undersize (0.025mm)
Green — 0.002-inch
Undersize (0.051mm)
Red -
2.4901 to 2.4986 (0.010 Undersize)
(63.2485 to 63.2358mm)
Yellow- 2.6910 to 2.6915
(68.3541 to 68.3641mm)
Red -0.010-inch
Undersize (0.254mm)
Red - 0.010-inch
Undersize (0.254mm)
NOTE: With Green and Red Coded Crankshaft Journals. Use Yellow Coded Cylinder Block Bores Only.
60262A
Crankshaft Connecting Rod Journal 2-6
Color Code and Diameter in
Inches (Journal Size)
Bearing Insert Color Code
Upper Insert Size Lower Insert Size
Yellow - 2.5001 to 2.4996 (Standard)
(63.5025 to 63.4898 mm)
Yellow
— Standard Yellow — Standard
Orange
- 2.4996 to 2.4991 (0.0005 Undersize)
(63.4898 to 63.4771 mm)
Yellow — Standard Black _ 0.001-inch Undersize (0.025rr.m)
Black
- 2.4991 to 2.4986 (0.001 Undersize)
(63.4771 to 63.4644 mm)
Black
- 0.001 -inch Undersize (0.025mm)
Black — 0.001-inch Undersize (0.025mm)
Green
- 2.4986 to 2.4981 (0.0015 Undersize)
(63.4644 to 63.4517 mm)
Black
— 0.001-inch Undersize (0.025mm)
Green _ 0.002-inch Undersize (0.051mm)
Red
- 2.4901 to 2.4986 (0.010 Undersize)
(63.2485 to 63.2358 mm)
Red
- 0.010-inch Undersize (0.254mm) Red _ 0.010-inch Undersize (0.254mm)
60262B