1D-116 Engine Mechanical: For J20 Engine
•
Selection of connecting rod bearings:
NOTE
• If bearing is in malcondition or bearing
clearance is out of specification, select a
new standard bearing according to the
following procedure and install it.
• When replacing crankshaft or connecting
rod and its bearing due to any reason,
select new standard bearings to be
installed referring to numbers stamped on
connecting rod and its cap and/or
alphabets stamped on crank web of No. 3
cylinder.
a. Check stamped numbers on connecting rod and
its cap as shown.
Three kinds of numbers (“1”, “2” and “3”)
represent the following connecting rod big end
inside diameters.
For example, stamped number “1” indicates that
corresponding connecting rod big-end inside
diameter is 53.0000 – 53.0060 mm (2.0867 –
2.0868 in.).
Connecting rod big-end inside diameter
b. Next, check crank pin diameter. On crank web of
No. 3 cylinder, four alphabets are stamped as
shown in the figure.
Three kinds of alphabet (“A”, “B” and “C”)
represent the following crank pin diameter
respectively.
For example, stamped “A” indicates that
corresponding crank pin diameter is 49.9940 –
50.0000 mm (1.9683 – 1.9685 in.).
Crank pin diameter
c. There are 5 kinds of standard bearings differing in
thickness. To distinguish them, they are painted in
the following colors at the position as indicated in
the figure.
Each color indicated the following thickness at the
center of bearing.
Standard size of connecting rod bearing
thickness
Stamped numbers
Connecting rod big-end
inside diameter
1
53.0000 – 53.0060 mm
(2.0867 – 2.0868 in.)
2
53.0061 – 53.0120 mm
(2.0869 – 2.0870 in.)
3
53.0121 – 53.0180 mm
(2.0871 – 2.0873 in.)
[A]: Weight indication mark (It is not necessary in servicing)
[B]: Connecting rod big-end inside diameter number
I2RH01140210-01
Stamped alphabet
Crank pin diameter
(without bearing)
A
49.9940 – 50.0000 mm
(1.9683 – 1.9685 in.)
B
49.9880 – 49.9939 mm
(1.9681 – 1.9682 in.)
C
49.9820 – 49.9879 mm
(1.9677 – 1.9680 in.)
[A]: Crankshaft pin diameter for No.1 cylinder
[B]: Crankshaft pin diameter for No.2 cylinder
[C]: Crankshaft pin diameter for No.3 cylinder
[D]: Crankshaft pin diameter for No.4 cylinder
Color painted
Bearing thickness
Green
1.482 – 1.485 mm
(0.05835 – 0.05846 in.)
Black
1.485 – 1.488 mm
(0.05847 – 0.05858 in.)
Colorless
1.488 – 1.491 mm
(0.05859 – 0.05870 in.)
Yellow
1.491 – 1.494 mm
(0.05871 – 0.05881 in.)
Blue
1.494 – 1.497 mm
(0.05882 – 0.05893 in.)
I5JB0A142055-01
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