Infiniti G37 Coupe. Manual — part 641
SERVICE DATA AND SPECIFICATIONS (SDS)
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Intake Manifold
INFOID:0000000001547542
INTAKE MANIFOLD
Unit: mm (in)
Exhaust Manifold
INFOID:0000000001547543
EXHAUST MANIFOLD
Unit: mm (in)
Camshaft
INFOID:0000000001547544
CAMSHAFT (EXH)
Unit: mm (in)
*
1
: Cam wear limit
*
2
: Total indicator reading
CAMSHAFT (INT)
Unit: mm (in)
*
1
: Total indicator reading
Items
Limit
Surface distortion
Intake manifold
0.1 (0.004)
Items
Limit
Surface distortion
Exhaust manifold
0.7 (0.028)
Items
Standard
Limit
Camshaft (EXH) journal oil clearance
No. 1
0.045 - 0.086 (0.0018 - 0.0034)
0.150 (0.0059)
No. 2, 3, 4
0.035 - 0.076 (0.0014 - 0.0030)
VVEL ladder assembly bracket inner diameter (EXH)
No. 1
26.000 - 26.021 (1.0236 - 1.0244)
—
No. 2, 3, 4
23.500 - 23.521 (0.9252 - 0.9260)
—
Camshaft (EXH) journal diameter
No. 1
25.935 - 25.955 (1.0211 - 1.0218)
—
No. 2, 3, 4
23.445 - 23.465 (0.9230 - 0.9238)
—
Camshaft (EXH) end play
0.115 - 0.188 (0.0045 - 0.0074)
0.24 (0.0094)
Camshaft (EXH) cam height “A”
Bank 1
45.015 - 45.205 (1.7722 - 1.7797)
0.2 (0.008)*
1
Bank 2
46.735 - 46.925 (1.8400 - 1.8474)
Camshaft (EXH) runout [TIR*
2
]
Less than 0.02 mm (0.001)
0.05 (0.002)
Camshaft sprocket (EXH) runout [TIR*
2
]
—
0.15 (0.0059)
SEM671
Items
Standard
Limit
Drive shaft end play
0.115 - 0.188 (0.0045 - 0.0074)
0.24 (0.0094)
Camshaft sprocket (INT) runout [TIR*
1
]
—
0.15 (0.0059)
EM-140
< SERVICE DATA AND SPECIFICATIONS (SDS)
SERVICE DATA AND SPECIFICATIONS (SDS)
VALVE LIFTER
Unit: mm (in)
VALVE CLEARANCE
Unit: mm (in)
*: Approximately 80
°
C (176
°
F)
AVAILABLE VALVE LIFTER
Unit: mm (in)
Items
Standard
Valve lifter outer diameter
33.980 - 33.990 (1.3378 - 1.3382)
Valve lifter hole diameter
34.000 - 34.016 (1.3386 - 1.3392)
Valve lifter clearance
0.010 - 0.036 (0.0004 - 0.0014)
Items
Cold
Hot* (reference data)
Intake
0.26 - 0.34 (0.010 - 0.013)
0.304 - 0.416 (0.012 - 0.016)
Exhaust
0.29 - 0.37 (0.011 - 0.015)
0.308 - 0.432 (0.012 - 0.017)
Identification (stamped) mark
Thickness
788T
7.88 (0.3102)
790T
7.90 (0.3110)
792T
7.92 (0.3118)
794T
7.94 (0.3126)
796T
7.96 (0.3134)
798T
7.98 (0.3142)
800T
8.00 (0.3150)
802T
8.02 (0.3157)
804T
8.04 (0.3165)
806T
8.06 (0.3173)
808T
8.08 (0.3181)
810T
8.10 (0.3189)
812T
8.12 (0.3197)
814T
8.14 (0.3205)
816T
8.16 (0.3213)
818T
8.18 (0.3220)
820T
8.20 (0.3228)
822T
8.22 (0.3236)
824T
8.24 (0.3244)
826T
8.26 (0.3252)
828T
8.28 (0.3260)
830T
8.30 (0.3268)
832T
8.32 (0.3276)
834T
8.34 (0.3283)
836T
8.36 (0.3291)
838T
8.38 (0.3299)
SERVICE DATA AND SPECIFICATIONS (SDS)
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Cylinder Head
INFOID:0000000001547545
CYLINDER HEAD
Unit: mm (in)
VALVE DIMENSIONS
Unit: mm (in)
840T
8.40 (0.3307)
Identification (stamped) mark
Thickness
SEM758G
Items
Standard
Limit
Head surface distortion
Less than 0.03 (0.0012)
0.1 (0.004)
Normal cylinder head height “H”
126.4 (4.98)
—
PBIC0924E
Valve head diameter “D”
Intake
36.6 - 36.9 (1.441 - 1.453)
Exhaust
30.2 - 30.5 (1.189 - 1.201)
Valve length “L”
Intake
100.11 (3.94)
Exhaust
94.67 (3.7272)
Valve stem diameter “d”
Intake
5.965 - 5.980 (0.2348 - 0.2354)
Exhaust
5.962 - 5.970 (0.2347 - 0.2350)
SEM188
EM-142
< SERVICE DATA AND SPECIFICATIONS (SDS)
SERVICE DATA AND SPECIFICATIONS (SDS)
VALVE GUIDE
Unit: mm (in)
*: Parts settings are for exhaust side only
VALVE SEAT
Unit: mm (in)
Valve seat angle “
α
”
Intake
45
°
15
′
- 45
°
45
′
Exhaust
Valve margin “T”
Intake
1.1 (0.043)
Exhaust
1.3 (0.051)
Valve margin “T” limit
0.5 (0.020)
Valve stem end surface grinding limit
0.2 (0.008)
Items
Standard
Oversize (Service) [0.2 (0.008)]*
Valve guide
Outer diameter
10.023 - 10.034 (0.3946 - 0.3950)
10.223 - 10.234 (0.4025 - 0.4029)*
Inner diameter (Finished size)
6.000 - 6.018 (0.2362 - 0.2369)
Cylinder head valve guide hole diameter
9.975 - 9.996 (0.3927 - 0.3935)
10.175 - 10.196 (0.4006 - 0.4014)*
Interference fit of valve guide
0.027 - 0.059 (0.0011 - 0.0023)
Items
Standard
Limit
Valve guide clearance
Intake
0.020 - 0.053 (0.0008 - 0.0021)
0.08 (0.003)
Exhaust
0.030 - 0.056 (0.0012 - 0.0022)
0.09 (0.004)
Projection length “L”
12.6 - 12.8 (0.496 - 0.504)
SEM950E
Items
Standard
Oversize (Service) [0.5 (0.02)] *
4
Cylinder head seat recess diameter “D”
Intake
38.000 - 38.016 (1.4961 - 1.4967)
—
Exhaust
31.600 - 31.616 (1.2441 - 1.2447)
32.100 - 32.116 (1.2638 - 1.2644)*
4
Valve seat outer diameter “d”
Intake
38.097 - 38.113 (1.4999 - 1.5005)
—
Exhaust
31.680 - 31.696 (1.2472 - 1.2479)
32.180 - 32.196 (1.2669 - 1.2676)*
4
PBIC2745E
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