Suzuki Engine 2002 GRAND VITARA SQ625, Руководство по обслуживанию

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ENGINE MECHANICAL (H25 ENGINE) 6A2-81
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 two positions as shown in figure.
If any of the following conditions is noted, rebore cylinder.
– Cylinder bore dia. exceeds limit.
– Difference of measurements at two positions exceeds taper
limit.
– Difference between thrust and axial measurements
exceeds out-of-round limit.
Cylinder bore dia. limit
84.050 mm (3.3090 in.)
Cylinder bore taper
Limit : 0.10 mm (0.0039 in.)
Cylinder bore out-of-round
Limit : 0.10 mm (0.0039 in.)
Pistons
• Inspect piston for faults, cracks or other damages.
Damaged or faulty piston should be replaced.
• Piston diameter :
As indicated in 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
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.)
Standard
83.970 – 83.990 mm
(3.3059 – 3.3066 in.)
0.50 mm
(0.0196 in.)
84.470 – 84.490 mm
(3.3256 – 3.3263 in.)