Infiniti G20 (P11). Manual — part 397
VALVE SEAT RESURFACE LIMIT
NCEM0031S08
Unit: mm (in)
AEM343
Depth (L)
42.74 - 43.26 (1.6827 - 1.7031)
Camshaft and Camshaft Bearing
NCEM0032
Unit: mm (in)
Standard
Limit
Camshaft journal to bearing clearance
0.030 - 0.071 (0.0012 - 0.0028)
0.15 (0.0059)
Inner diameter of camshaft bearing
28.000 - 28.021 (1.1024 - 1.1032)
—
Outer diameter of camshaft journal
27.935 - 27.955 (1.0998 - 1.1006)
—
Camshaft runout [TIR*]
Less than 0.02 (0.0008)
0.1 (0.004)
Camshaft sprocket runout [TIR*]
Less than 0.25 (0.0098)
—
Camshaft end play
0.055 - 0.139 (0.0022 - 0.0055)
0.20 (0.0079)
EM671
Cam height “A”
Intake
37.550 - 37.740 (1.4783 - 1.4858)
Exhaust
37.920 - 38.110 (1.4929 - 1.5004)
Wear limit of cam height
0.2 (0.008)
Valve lift
Intake
9.4 (0.370)
Exhaust
8.8 (0.346)
*Total indicator reading
GI
MA
LC
EC
FE
CL
MT
AT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
SERVICE DATA AND SPECIFICATIONS (SDS)
Valve (Cont’d)
EM-73
Cylinder Block
NCEM0033
Unit: mm (in)
SEM008D
SEM686DB
Surface flatness
Standard
Less than 0.03 (0.0012)
Limit
0.10 (0.0039)
Cylinder bore
Inner diameter
Standard
Grade No. 1
86.000 - 86.010 (3.3858 - 3.3862)
Grade No. 2
86.010 - 86.020 (3.3862 - 3.3866)
Grade No. 3
86.020 - 86.030 (3.3866 - 3.3870)
Wear limit
0.20 (0.0079)
Out-of-round (X − Y)
Less than 0.015 (0.0006)
Taper (A − B and A − C)
Less than 0.010 (0.0004)
Difference in inner diameter between cylin-
ders
Limit
Less than 0.05 (0.0020)
Main journal inner diameter
Grade No. 0
58.944 - 58.950 (2.3206 - 2.3209)
Grade No. 1
58.950 - 58.956 (2.3209 - 2.3211)
Grade No. 2
58.956 - 58.962 (2.3211 - 2.3213)
Grade No. 3
58.962 - 58.968 (2.3213 - 2.3216)
SERVICE DATA AND SPECIFICATIONS (SDS)
Cylinder Block
EM-74
Piston, Piston Ring and Piston pin
NCEM0034
PISTON
NCEM0034S01
Unit: mm (in)
SEM086G
Piston skirt diameter “A”
Standard
Grade No. 1
85.980 - 85.990 (3.3850 - 3.3854)
Grade No. 2
85.990 - 86.000 (3.3854 - 3.3858)
Grade No. 3
86.000 - 86.010 (3.3858 - 3.3862)
0.20 (0.0079) oversize (Service)
86.180 - 86.210 (3.3929 - 3.3941)
“a” dimension
45.0 (1.772)
Piston clearance to cylinder block
0.010 - 0.030 (0.0004 - 0.0012)
Piston pin hole diameter
21.993 - 22.005 (0.8659 - 0.8663)
PISTON RING
NCEM0034S02
Unit: mm (in)
Side clearance
Top
Standard
0.04 - 0.08 (0.0016 - 0.0031)
Limit
0.1 (0.004)
2nd
Standard
0.03 - 0.07 (0.0012 - 0.0028)
Limit
0.1 (0.004)
Oil
Standard
0.065 - 0.135 (0.0026 - 0.0053)
Limit
—
Ring end gap
Top
Standard
0.20 - 0.39 (0.0079 - 0.0154)
Limit
0.53 (0.0209)
2nd
Standard
0.35 - 0.59 (0.0138 - 0.0232)
Limit
0.7 (0.028)
Oil
Standard
0.20 - 0.69 (0.0079 - 0.0272)
Limit
0.95 (0.0374)
PISTON PIN
NCEM0034S03
Unit: mm (in)
Piston pin outer diameter
21.989 - 22.001 (0.8657 - 0.8622)
Interference fit of piston pin to piston
0.002 - 0.006 (0.0001 - 0.0002)
Piston pin to connecting rod bushing clearance
Standard
0.005 - 0.017 (0.0002 - 0.0007)
Limit
0.023 (0.0009)
* Values measured at ambient temperature of 20°C (68°F)
GI
MA
LC
EC
FE
CL
MT
AT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
SERVICE DATA AND SPECIFICATIONS (SDS)
Piston, Piston Ring and Piston pin
EM-75
Connecting Rod
NCEM0035
Unit: mm (in)
Center distance
136.25 - 136.35 (5.3642 - 5.3681)
Bend [per 100 (3.94)]
Limit
0.15 (0.0059)
Torsion [per 100 (3.94)]
Limit
0.30 (0.0118)
Connecting rod small end inner diameter
24.980 - 25.000 (0.9835 - 0.9843)
Piston pin bushing inner diameter*
22.000 - 22.012 (0.8661 - 0.8666)
Connecting rod big end inner diameter
51.000 - 51.013 (2.0079 - 2.0084)
Side clearance
Standard
0.20 - 0.35 (0.0079 - 0.0138)
Limit
0.5 (0.020)
*After installing in connecting rod
SERVICE DATA AND SPECIFICATIONS (SDS)
Connecting Rod
EM-76
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