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10-42 SERVICING INFORMATION
CYLINDER + PISTON + PISTON RING Unit: mm (in)
ITEM STANDARD LIMIT
Compression pressure 1 200 – 1 600 kPa
(12 – 16 kgf/cm², 171 – 228 psi)
900 kPa
(9 kgf/cm
2
, 128 psi)
Compression pressure difference
—
200 kPa
(2 kgf/cm
2
, 28 psi)
Piston to cylinder clearance 0.030 – 0.040
(0.0012 – 0.0016)
0.120
(0.0047)
Cylinder bore 67.000 – 67.015
(2.6378 – 2.6384)
Nicks or
Scratches
Piston diam. 66.965 – 66.980
(2.6364 – 2.6370)
Measure at 15 mm (0.6 in) from the skirt end.
66.880
(2.6331)
Cylinder distortion
—
0.02
(0.008)
Piston ring free end gap
1st T Approx. 5.5 (0.22)
4.4
(0.17)
2nd T Approx. 8.5 (0.33)
6.8
(0.27)
Piston ring end gap
1st T
0.06 – 0.21
(0.002 – 0.008)
0.50
(0.020)
2nd T
0.06 – 0.21
(0.002 – 0.008)
0.50
(0.020)
Piston ring to groove clearance
1st —
0.180
(0.0071)
2nd —
0.150
(0.0059)
Piston ring groove width
1st
1.01 – 1.03
(0.0398 – 0.0406)
—
2nd
0.81 – 0.83
(0.0319 – 0.0327)
—
Oil
1.51 – 1.53
(0.0594 – 0.0602)
—
Piston ring thickness
1st
0.97 – 0.99
(0.0382 – 0.0390)
—
2nd
0.77 – 0.79
(0.0303 – 0.0311)
—
Piston pin bore I.D. 14.002 – 14.008
(0.5513 – 0.5515)
14.030
(0.5524)
Piston pin O.D. 13.995 – 14.000
(0.5510 – 0.5512)
13.980
(0.5504)