Suzuki Wagon R Manual page 2255

6A2-88 ENGINE MECHANICAL (M13 ENGINE)
2) Next, check bearing cap bore diameter without bearing. On
mating surface of cylinder block, five alphabets are stamped
as shown in figure.
Three kinds of alphabets ("A", "B" and "C") or numbers ("1",
"2" and "3") represent the following cap bore diameters.
Stamped alphabets or numbers on cylinder block represent
bearing cap bore diameter marked with an arrow in figure
respectively. For example, stamped "A" or "1" indicates that
corresponding bearing cap bore diameter is 49.0000 –
49.0060 mm (1.9292 – 1.9293 in.).
Crankshaft bearing cap bore
Stamped
alphabet
(number)
A (1) 49.0000 – 49.0060 mm (1.9292 – 1.9293 in.)
B (2) 49.0061 – 49.0120 mm (1.9294 – 1.9296 in.)
C (3) 49.0121 – 49.0180 mm (1.9297 – 1.9298 in.)
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 crankshaft main bearing thickness
Color painted
Pink 1.990 – 1.994 mm (0.0784 – 0.0785 in.)
Purple 1.993 – 1.997 mm (0.0785 – 0.0786 in.)
Brown 1.996 – 2.000 mm (0.0786 – 0.0787 in.)
Green 1.999 – 2.003 mm (0.0787 – 0.0788 in.)
Black 2.002 – 2.006 mm (0.0789 – 0.0789 in.)
1. Paint
4) From number stamped on crank web No.2 and alphabets
stamped on cylinder block, determine new standard bearing
to be installed to journal, by referring to table shown below.
For example, if number stamped on crank web No.2 is "1"
and alphabet stamped on cylinder block is "B", install a new
standard bearing painted in "Purple" to its journal.
Bearing cap bore diameter
(without bearing)
Bearing thickness