Suzuki Engine 2002 GRAND VITARA SQ420 Service Manual page 560

1) Check stamped numbers on connecting rod and its cap as
shown.
Three kinds of numbers ("1", "2" and "3") represent the fol-
lowing connecting rod big end inside diameters.
For example, stamped number "1" indicates that correspond-
ing connecting rod big end inside diameter is 53.0000 –
53.0060 mm (2.0867 – 2.0868 in.).
Connecting rod big end inside diameter
Stamped
connecting rod big end inside diameter
numbers
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
[B] : Connecting rod big end inside diameter number
2) Next, check crankshaft pin diameter. On crank web of No.3
cylinder, four alphabets are stamped as shown in figure.
Three kinds of alphabet ("A", "B" and "C") represent the fol-
lowing crankshaft pin diameter respectively.
For example, stamped "A" indicates that corresponding
crankshaft pin diameter is 49.9940 – 50.0000 mm (1.9683 –
1.9685 in.).
Crankshaft pin diameter
Stamped
alphabet
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
ENGINE MECHANICAL (J20 ENGINE) 6A4-71
Crankshaft pin diameter
(without bearing)