1D-126 Engine Mechanical: For J20 Engine
4) From number stamped on crank web No.2 and alphabets stamped on lower crankcase, determine new standard
bearing to be installed to journal by referring to table shown.
For example, if number stamped on crank web No.2 is “5” and alphabet stamped on lower crankcase is “A”, install
new standard bearings painted in “Green” to cylinder block side journal and “Black” to lower crankcase side
journal.
NOTE
The meaning of “Upper” and “Lower” described in below table are the following.
• Upper: It is instruction of main bearing installed in cylinder block side journal.
• Lower: It is instruction of main bearing installed in lower crankcase side journal.
Main bearing cross-reference table (new standard bearing)
5) Check main bearing clearance with newly selected standard bearing referring to “Main Bearing Clearance”.
If clearance still exceeds its limit, use next thicker bearing and recheck clearance.
UNDERSIZE BEARING (0.25 mm):
• 0.25 mm undersize bearing is available, in five kinds varying in thickness.
To distinguish them, each bearing is painted (1) in the following colors at such position as indicated in figure.
Each color represents the following thickness at the center of bearing.
Undersize main bearing thickness
Standard number on crank web No.2
4
5
6
7
8
9
Standard
alphabet on
lower crankcase
A
Green
Upper: Green
Lower: Black
Black
Upper: Black
Lower: Colorless
Colorless
Upper: Colorless
Lower: Yellow
B
Black
Upper: Black
Lower: Colorless
Colorless
Upper: Colorless
Lower: Yellow
Yellow
Upper: Yellow
Lower: Blue
C Colorless
Upper: Colorless
Lower: Yellow
Yellow
Upper: Yellow
Lower: Blue
Blue
Blue
Color painted
Bearing thickness
Green & Red
2.1160 – 2.1190 mm (0.08331 – 0.08342 in.)
Black & Red
2.1190 – 2.1220 mm (0.08343 – 0.08354 in.)
Red only
2.1220 – 2.1250 mm (0.08355 – 0.08366 in.)
Yellow & Red
2.1250 – 2.1280 mm (0.08367 – 0.08377 in.)
Blue & Red
2.1280 – 2.1310 mm (0.08378 – 0.08389 in.)
I2RH01140192-01
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