Infiniti FX35, FX50 (S51). Manual — part 996
EM-284
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SERVICE DATA AND SPECIFICATIONS (SDS)
VALVE CLEARANCE
Unit: mm (in)
*: Approximately 80
°
C (176
°
F)
AVAILABLE VALVE LIFTER
Unit: mm (in)
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
788P
7.88 (0.3102)
790P
7.90 (0.3110)
792P
7.92 (0.3118)
794P
7.94 (0.3126)
796P
7.96 (0.3134)
798P
7.98 (0.3142)
800P
8.00 (0.3150)
802P
8.02 (0.3157)
804P
8.04 (0.3165)
806P
8.06 (0.3173)
808P
8.08 (0.3181)
810P
8.10 (0.3189)
812P
8.12 (0.3197)
814P
8.14 (0.3205)
816P
8.16 (0.3213)
818P
8.18 (0.3220)
820P
8.20 (0.3228)
822P
8.22 (0.3236)
824P
8.24 (0.3244)
826P
8.26 (0.3252)
828P
8.28 (0.3260)
830P
8.30 (0.3268)
832P
8.32 (0.3276)
834P
8.34 (0.3283)
836P
8.36 (0.3291)
838P
8.38 (0.3299)
840P
8.40 (0.3307)
SEM758G
SERVICE DATA AND SPECIFICATIONS (SDS)
EM-285
< SERVICE DATA AND SPECIFICATIONS (SDS)
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Cylinder Head
INFOID:0000000005245271
CYLINDER HEAD
Unit: mm (in)
VALVE DIMENSIONS
Unit: mm (in)
VALVE GUIDE
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
5.955 - 5.970 (0.2344 - 0.2350)
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)
SEM188
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< SERVICE DATA AND SPECIFICATIONS (SDS)
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SERVICE DATA AND SPECIFICATIONS (SDS)
Unit: mm (in)
*: Parts settings are for exhaust side only
VALVE SEAT
Unit: mm (in)
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 - 0.063 (0.0012 - 0.0025)
0.09 (0.004)
Projection length “L”
Intake
12.6 - 12.8 (0.496 - 0.504)
Exhaust
11.9 - 12.1 (0.469 - 0.476)
SEM950E
Items
Standard
Oversize (Service) [0.5 (0.02)] *
4
Cylinder head seat recess di-
ameter “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
Valve seat interference fit
Intake
0.081 - 0.113 (0.0032 - 0.0044)
Exhaust
0.064 - 0.096 (0.0025 - 0.0038)
Diameter “d1”*
1
Intake
34.6 (1.362)
Exhaust
27.7 (1.091)
Diameter “d2”*
2
Intake
35.9 - 36.4 (1.413 - 1.433)
Exhaust
29.3 - 29.8 (1.154 - 1.173)
Angle “
α
1”
59 - 61
°
PBIC2745E
SERVICE DATA AND SPECIFICATIONS (SDS)
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*
1
: Diameter made by intersection point of conic angles “
α
1” and “
α
2”
*
2
: Diameter made by intersection point of conic angles “
α
2” and “
α
3”
*
3
: Machining data
*
4
: Parts settings are for exhaust side only
VALVE SPRING
Cylinder Block
INFOID:0000000005245272
CYLINDER BLOCK
Unit: mm (in)
Angle “
α
2”
88
°
45
′
- 90
°
15
′
Angle “
α
3”
119 - 121
°
Contacting width “W”*
3
Intake
1.0 - 1.4 (0.039 - 0.055)
Exhaust
1.2 - 1.6 (0.047 - 0.063)
Height “h”
Intake
5.9 - 6.0 (0.232 - 0.236)
—
Exhaust
5.9 - 6.0 (0.232 - 0.236)
4.9 - 5.0 (0.1949 - 0.1988)*
4
Depth “H”
6.0 (0.236)
Item
Standard
Intake
Exhaust
Free height
48.69 mm (1.9169 in)
47.35 mm (1.8642 in)
Pressure
Installation
162 - 192 N (16.5 - 19.6 kg, 36 - 43 lb)
at 42.40 mm (1.6693 in)
163 - 191 N (16.6 - 19.5 kg, 37 - 43 lb)
at 35.45 mm (1.3957 in)
Valve open
609 - 695 N (62.1 - 70.9 kg, 137 - 156 lb)
at 28.83 mm (1.1350 in)
370 - 426 N (37.7 - 43.5 kg, 83 - 96 lb)
at 25.65 mm (1.0098 in)
Identification color
Yellow
Pink
Item
Limit
Intake
Exhaust
Out-of-square
2.1 mm (0.083 in)
2.0 mm (0.079 in)
Surface flatness
Limit
0.1 (0.004)
Main bearing housing inner diameter
Standard
68.944 - 68.968 (2.7143 - 2.7153)
Cylinder bore
Inner diameter
Standard
Grade No. 1
95.500 - 95.510 (3.7598 - 3.7602)
Grade No. 2
95.510 - 95.520 (3.7602 - 3.7606)
Grade No. 3
95.520 - 95.530 (3.7606 - 3.7610)
Wear limit
0.2 (0.008)
Out-of-round
Limit
0.015 (0.0006)
Taper
0.010 (0.0004)
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