Engine Mechanical: For J20 Engine 1D-125
2) Next, check journal bore diameter. On lower
crankcase five alphabets are stamped as shown in
figure.
Three kinds of alphabets (“A”, “B” and “C”) represent
the following journal bore diameters.
Journal bore diameter
Stamped alphabets on lower crankcase represent
journal diameter marked with an arrow in figure
respectively.
For example, stamped alphabet “A” at No.2 journal
indicates that (journal) bore diameter of No.2 journal
is 62.0000 – 62.0060 mm (2.44094 – 2.44117 in.).
3) There are 5 kinds of standard bearings differing in
thickness. To distinguish them, they are painted (1)
in the following colors at the position as indicated in
figure.
Each color indicates the following thickness at the
center of bearing.
Standard size main bearing thickness
Stamped alphabet
Journal bore diameter
A
62.0000 – 62.0060 mm
(2.44094 – 2.44117 in.)
B
62.0061 – 62.0120 mm
(2.44118 – 2.44141 in.)
C
62.0121 – 62.0180 mm
(2.44142 – 2.44164 in.)
1. No.1 journal
5. No.5 journal
2. No.2 journal
6. Crankshaft pulley side
3. No.3 journal
7. Flywheel side
4. No.4 journal
6
7
2
3
4
5
1
I4RH01140048-01
Color painted
Bearing thickness
Green
1.9910 – 1.9940 mm
(0.07839 – 0.07850 in.)
Black
1.9940 – 1.9970 mm
(0.07851 – 0.07862 in.)
Colorless (no painted)
1.9970 – 2.0000 mm
(0.07863 – 0.07874 in.)
Yellow
2.0000 – 2.0030 mm
(0.07874 – 0.07885 in.)
Blue
2.0030 – 2.0060 mm
(0.07886 – 0.07897 in.)
I2RH01140191-01
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