Suzuki 2000 Grand Vitara SQ625 Service Manual page 478

1. 50 mm (1.96 in.)
2. 95 mm (3.74 in.)
INSPECTION
Cylinder
D Inspect cylinder walls for scratches, roughness, or ridges which
indicate excessive wear. If cylinder bore is very rough or deeply
scratched, or ridged, rebore cylinder and use over size piston.
D Using a cylinder gauge, measure cylinder bore in thrust and axial
directions at two positions as shown in figure.
If any of the following conditions is noted, rebore cylinder.
1. Cylinder bore dia. exceeds limit.
2. Difference of measurements at two positions exceeds taper
3. Difference between thrust and axial measurements exceeds
Pistons
D Inspect piston for faults, cracks or other damages.
Damaged or faulty piston should be replaced.
D Piston diameter:
As indicated in figure, piston diameter should be measured at a
position 26.5 mm (1.04 in.) from piston skirt end in the direction
perpendicular to piston pin.
1. 26.5 mm (1.04 in.)
limit.
out-of-round limit.
Cylinder bore dia. limit:
Taper and out-of-round limit: 0.10 mm (0.004in.)
NOTE:
If any one of four cylinders has to be rebored, rebore all
four to the same next oversize. This is necessary for the
sake of uniformity and balance.
Standard
Oversize:
Piston
0.25 mm
diameter
(0.0098 in.)
0.50 mm
(0.0196 in.)
ENGINE MECHANICAL (J20 ENGINE) 6A4-59
84.050 mm (3.3090 in.)
83.970 – 83.990 mm
(3.3059 – 3.3066 in.)
84.220 – 84.240 mm
(3.3157 – 3.3165 in.)
84.470 – 84.490 mm
(3.3256 – 3.3263 in.)