Suzuki GRAND VITARA XL-7 Owner's Manual page 309

6A2-22 ENGINE MECHANICAL (H27 ENGINE)
INSPECTION
Cylinders
• 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.
• Using a cylinder gauge, measure cylinder bore in thrust and
axial directions at 2 positions (1, 2) as shown in the figure.
If any of the following conditions is noted, rebore cylinder.
– Cylinder bore dia. exceeds limit.
– Difference of measurements at 2 positions exceeds taper
limit.
– Difference between thrust and axial measurements
exceeds out-of-round limit.
Cylinder bore dia. limit :
88.050 mm (3.4665 in.)
Taper and out-of-round limit :
0.10 mm (0.004 in.)
NOTE:
If any one of six cylinders has to be rebored, rebore all
six to the same next oversize. This is necessary for the
sake of uniformity and balance.
1. 50 mm (1.96 in.)
2. 95 mm (3.74 in.)
Pistons
• Inspect piston for faults, cracks or other damages.
Damaged or faulty piston should be replaced.
• Piston diameter :
As shown in the figure, piston diameter should be measured
at a position 26.5 mm (1.04 in.) (1) from piston skirt end in
the direction perpendicular to piston pin.
Piston diameter :
Standard
Oversize :
0.50 mm (0.0196 in.)
87.970 – 87.990 mm
(3.4634 – 3.4642 in.)
88.470 – 88.490 mm
(3.4831 – 3.4839 in.)