Suzuki Grand Vitara 2011 Manual page 601

Assembly
NOTE
Two sizes of piston are available as standard size spare part so as to ensure proper piston-to-cylinder
clearance. When installing a standard size piston, make sure to match piston with cylinder as follows.
1) Each piston (1) has stamped number (2) as shown. It represents outer diameter of piston.
2) There are also painted color (3) of red or blue on cylinder block (2) as shown.
3) Stamped number on piston and painted color (or stamped number) on cylinder block should correspond. That is,
install number "2" stamped piston to cylinder which is identified with blue painted (or "2" stamped) and a number
"1" piston to cylinder with red painted (or "1" stamped).
Also, a letter "A" or "B" is stamped on piston head but ordinarily it is not necessary to discriminate each piston by
this letter.
Piston outer diameter and cylinder bore diameter specification
Piston
Number Outer diameter
83.9800 – 83.9900 mm
1
(3.3063 – 3.3066 in.)
83.9700 – 83.9799 mm
2
(3.3059 – 3.3062 in.)
4. Crank shaft pulley side
5. Flywheel side
6. No.1 cylinder
Cylinder
Paint
Bore diameter
(Number)
84.0101 – 84.0200 mm
Red (1)
(3.3075 – 3.3078 in.)
84.0000 – 84.0100 mm
Blue (2)
(3.3071 – 3.3074 in.)
Engine Mechanical: For J20 Engine 1D-111
I5JB0A142050-01
7. No.2 cylinder
8. No.3 cylinder
9. No.4 cylinder