“a”: 50 mm (1.96 in.)
“b”: 95 mm (3.74 in.)
“a”: 23 mm (0.91 in.)
6A1-56 ENGINE MECHANICAL (G13B, 1-CAM 16-VALVES ENGINE)
INSPECTION
Cylinders
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 oversize 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 lim-
it.
3) Difference between thrust and axial measurements exceeds
out-of-round limit.
Cylinder bore dia. limit: 74.15 mm (2.9196 in.)
Tapper and out-of-round limit: 0.10 mm (0.0039 in.)
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.
Pistons
D Inspect piston for faults, cracks or other damaged.
Damaged or faulty piston should be replaced.
D Piston diameter:
As indicated in figure, piston diameter should be measured at a
position 23 mm (0.91 in.) from piston skirt end in the direction per-
pendicular to piston pin.
Standard
73.970 – 73.990 mm
(2.9122 – 2.9130 in.)
Piston
diameter
Oversize:
0.25 mm
(0.0098 in.)
74.220 – 74.230 mm
(2.9220 – 2.9224 in.)
0.50 mm
(0.0196 in.)
74.470 –74.480 mm
(2.9319 – 2.9323 in.)
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