GS500K4/FK4 (’04-MODEL) 20-7
CONROD + CRANKSHAFT + BALANCER Unit: mm (in)
OIL PUMP
ITEM STANDARD LIMIT
Piston ring groove width
1st
1.21 – 1.23
(0.047 – 0.048)
—
2nd
1.21 – 1.23
(0.047 – 0.048)
—
Oil
2.51 – 2.53
(0.099 – 0.100)
—
Piston ring thickness
1st
1.17 – 1.19
(0.046 – 0.047)
—
2nd
1.17 – 1.19
(0.046 – 0.047)
—
Piston pin bore 18.002 – 18.008
(0.7087 – 0.7090)
18.030
(0.7098)
Piston pin O.D. 17.995 – 18.000
(0.7085 – 0.7087)
17.980
(0.7079)
ITEM STANDARD LIMIT
Conrod small end I.D. 18.006 – 18.014
(0.7089 – 0.7092)
18.040
(0.7102)
Conrod big end side clearance 0.1 – 0.2
(0.004 – 0.008)
0.3
(0.012)
Conrod big end width 22.95 – 23.00
(0.904 – 0.906)
—
Crank pin width 23.10 – 23.15
(0.909 – 0.911)
—
Conrod big end oil clearance 0.024 – 0.048
(0.0009 – 0.0019)
0.080
(0.0031)
Crank pin O.D. 33.976 – 34.000
(1.3376 – 1.3386)
—
Crankshaft journal oil clearance 0.020 – 0.044
(0.0008 – 0.0017)
0.080
(0.0031)
Crankshaft journal O.D. 31.976 – 32.000
(1.2589 – 1.2598)
—
Crankshaft thrust bearing
thickness
2.950 – 2.975
(0.1161 – 0.1171)
2.850
(0.1122)
Crankshaft runout
—
0.05
(0.002)
Balancer journal oil clearance 0.020 – 0.044
(0.0008 – 0.0017)
0.080
(0.0031)
Balancer journal O.D. 31.984 – 32.000
(1.2592 – 1.2598)
—
Balancer spring free length
—
14.9
(0.59)
ITEM STANDARD LIMIT
Oil pump reduction ratio 1.879 (76/28 × 27/39) —
Oil pressure (at 60 °C, 140 °F) Above 200 kPa (2.0 kgf/cm
2
, 28 psi)
Below 500 kPa (5.0 kgf/cm
2
, 71 psi)
at 3 000 r/min
—
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