0C-2 Service Data:
Cylinder + Piston + Piston Ring
Unit: mm (in)
Conrod + Crankshaft
Unit: mm (in)
Item Standard Limit
Compression pressure 1 300 – 1 700 kPa (13 – 17 kgf/cm
2
, 185 – 242 psi)
1 000 kPa
(10 kgf/cm
2
, 142 psi)
Compression pressure difference —
200 kPa
(2 kgf/cm
2
, 28 psi)
Piston-to-cylinder clearance 0.025 – 0.035 (0.0010 – 0.0014) 0.120 (0.0047)
Cylinder bore 79.000 – 79.015 (3.1102 – 3.1108) Nicks or Scratches
Piston diam.
78.970 – 78.985 (3.1090 – 3.1096)
Measure 15 mm (0.6 in) from the skirt end.
78.880 (3.1055)
Cylinder distortion — 0.20 (0.008)
Piston ring free end gap
1st IN Approx. 9 (0.35) 7.2 (0.28)
2nd N Approx. 9.5 (0.37) 7.6 (0.30)
Piston ring end gap
1st IN 0.06 – 0.21 (0.002 – 0.008) 0.5 (0.020)
2nd N 0.06 – 0.21 (0.002 – 0.008) 0.5 (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 (0.040 – 0.041) —
2nd 0.81 – 0.83 (0.032 – 0.033) —
Oil 1.51 – 1.53 (0.059 – 0.060) —
Piston ring thickness
1st 0.97 – 0.99 (0.038 – 0.039) —
2nd 0.77 – 0.79 (0.030 – 0.031) —
Piston pin bore I.D. 18.002 – 18.008 (0.7087 – 0.7090) 18.030 (0.7098)
Piston pin O.D. 17.996 – 18.000 (0.7085 – 0.7087) 17.980 (0.7079)
Item Standard Limit
Conrod small end I.D. 18.010 – 18.018 (0.7091 – 0.7094) 18.040 (0.7102)
Conrod big end side clearance 0.10 – 0.20 (0.004 – 0.008) 0.30 (0.012)
Conrod big end width 20.95 – 21.00 (0.825 – 0.827) —
Crank pin width 21.10 – 21.15 (0.831 – 0.833) —
Conrod big end oil clearance 0.032 – 0.056 (0.0013 – 0.0022) 0.080 (0.0031)
Crank pin O.D. 37.976 – 38.000 (1.4951 – 1.4961) —
Crankshaft journal oil clearance 0.016 – 0.040 (0.0006 – 0.0016) 0.080 (0.0031)
Crankshaft journal O.D. 33.976 – 34.000 (1.3376 – 1.3386) —
Crankshaft thrust clearance 0.055 – 0.110 (0.0022 – 0.0043) —
Crankshaft thrust bearing thickness
Right side 2.425 – 2.450 (0.0955 – 0.0965) —
Left side 2.350 – 2.500 (0.0925 – 0.0984) —
Crankshaft runout — 0.05 (0.002)
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