6A2-78 ENGINE MECHANICAL (M13 ENGINE)
3) There are five kinds of standard bearings differing in thick-
ness. To distinguish them, they are painted in the following
colors at the position as indicated in figure.
Each color indicated the following thickness at the center of
bearing.
Standard size of connecting rod bearing thickness
4) From number stamped on connecting rod and its cap and
alphabets stamped on crank web No.3, determine new stan-
dard bearing to be installed to connecting rod big end inside,
by referring to table.
For example, if number stamped on connecting rod and its
cap is “1” and alphabet stamped on crank web No.3 is “B”,
install a new standard bearing painted in “Black” to its con-
necting rod big end inside.
Specification of new standard connecting rod bearing size
5) Using scale (1) on gaging plastic (2), check bearing clear-
ance with newly selected standard bearing.
If clearance still exceeds its limit, use next thicker bearing
and recheck clearance.
Color
painted
Bearing thickness
Blue 1.4991 – 1.5020 mm (0.05902 – 0.05913 in.)
Yellow 1.4961 – 1.4990 mm (0.05890 – 0.05901 in.)
Nothing 1.4931 – 1.4960 mm (0.05879 – 0.05889 in.)
Black 1.4901 – 1.4930 mm (0.05867 – 0.05878 in.)
Green 1.4870 – 1.4900 mm (0.05855 – 0.05866 in.)
1. Paint
Number stamped on connecting
rod and its cap (connecting rod
big end inside diameter)
123
Alphabet
stamped on
crank web No.3
(Crankshaft pin
diameter)
A Green Black Nothing
B Black Nothing Yellow
C Nothing Yellow Blue
New standard bearing to be
installed.
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