Suzuki GRAND VITARA XL-7 Owner's Manual page 320

3) There are 5 kinds of standard bearings differing in thickness.
To distinguish them, they are painted in following colors at
the position as shown in the figure.
Each color indicates the following thickness at the center of
bearing.
Standard size Main bearing thickness :
Color painted
Black
Colorless (no paint)
Yellow
Blue
Pink
1. Paint
4) From number stamped on crank webs at its center and
alphabets stamped on crankcase lower side, determine new
standard bearing to be installed to journal, by referring to
table shown below.
For example, if number stamped on crank webs is "1" and
alphabet stamped on crankcase is "B", install a new standard
bearing painted in "Black" to its journal.
New standard size bearing specification :
Alphabet stamped
on lower crankcase
(Cap bore dia.)
5) Using gaging plastic, check bearing clearance with newly
selected standard bearing.
If clearance still exceeds its limit, use next thicker bearing
and recheck clearance.
6) When replacing crankshaft or cylinder block and crank case
due to any reason, select new standard bearings to be
installed by referring to number stamped on new crankshaft
or alphabets stamped on new crankcase lower side.
ENGINE MECHANICAL (H27 ENGINE) 6A2-33
Bearing thickness
2.496 – 2.500 mm
(0.0983 – 0.0984 in.)
2.499 – 2.503 mm
(0.0984 – 0.0985 in.)
2.502 – 2.506 mm
(0.0985 – 0.0986 in.)
2.505 – 2.509 mm
(0.0986 – 0.0987 in.)
2.508 – 2.512 mm
(0.0987 – 0.0988 in.)
Number stamped on crank web
(Journal diameter)
1 2
A Black Colorless
B Colorless Yellow
C Yellow Blue
3
Yellow
Blue
Pink