Infiniti QX56 (JA60). Manual — part 489
EM-110
< SERVICE DATA AND SPECIFICATIONS (SDS)
SERVICE DATA AND SPECIFICATIONS (SDS)
Unit: mm (in)
*: Approximately 80
°C (176°F)
Available Valve Lifter
Unit: mm (in)
*: Always check with the Parts Department for the latest parts information
CYLINDER HEAD
Items
Hot*
Cold
Intake
0.304 - 0.416 (0.012 - 0.016)
0.26 - 0.34 (0.010 - 0.013)
Exhaust
0.308 - 0.432 (0.012 - 0.017)
0.29 - 0.37 (0.011 - 0.015)
Identification (stamped) Mark*
Thickness
N788
7.88 (0.3102)
N790
7.90 (0.3110)
N792
7.92 (0.3118)
N794
7.94 (0.3126)
N796
7.96 (0.3134)
N798
7.98 (0.3142)
N800
8.00 (0.3150)
N802
8.02 (03.157)
N804
8.04 (0.3165)
N806
8.06 (0.3173)
N808
8.08 (0.3181)
N810
8.10 (0.3189)
N812
8.12 (0.3197)
N814
8.14 (0.3205)
N816
8.16 (0.3213)
N818
8.18 (0.3220)
N820
8.20 (0.3228)
N822
8.22 (0.3236)
N824
8.24 (0.3244)
N826
8.26 (0.3252)
N828
8.28 (0.3260)
N830
8.30 (0.3268)
N832 8.32
(0.3276)
N834
8.34 (0.3283)
N836
8.36 (0.3291)
SEM758G
SERVICE DATA AND SPECIFICATIONS (SDS)
EM-111
< SERVICE DATA AND SPECIFICATIONS (SDS)
C
D
E
F
G
H
I
J
K
L
M
A
EM
N
P
O
Unit: mm (in)
Spark Plug Tube
Unit: mm (in)
Valve Dimensions
Unit: mm (in)
Items
Standard
Limit
Head surface distortion
0.03 (0.0012)
0.1 (0.004)
Nominal cylinder head height “H”
126.3 (4.97)
KBIA2554E
Items
Standard
Press fit height "H"
38.400 - 39.400 (1.512 - 1.551)
KBIA1248E
Standard model
Valve head diameter “D”
Intake
37.0 - 37.3 (1.457 - 1.469)
Exhaust
31.2 - 31.5 (1.228 - 1.240)
Valve length “L”
Intake
96.21- 96.71 (3.7878 - 3.8075)
Exhaust
93.74 - 94.24 (3.6905 - 3.7102)
Valve stem diameter “d”
Intake
5.965 - 5.980 (0.2348 - 0.2354)
Exhaust
5.955 - 5.970 (0.2344 - 0.2350)
SEM188
EM-112
< SERVICE DATA AND SPECIFICATIONS (SDS)
SERVICE DATA AND SPECIFICATIONS (SDS)
Valve Guide
Unit: mm (in)
Valve Seat
Unit: mm (in)
Valve Spring
Valve seat angle “
α”
Intake
45
°15′ - 45°45′
Exhaust
Valve margin “T”
Intake
1.1 (0.043)
Exhaust
1.3 (0.051)
Items
Standard
Oversize [0.2 (0.008)] (service)
Valve guide
Outside diameter
10.023 - 10.034 (0.3946 - 0.3950)
10.223 - 10.234 (0.4025 - 0.4029)
Inside 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
Stem to guide clearance
Intake
0.020 - 0.053 (0.0008 - 0.0021)
0.08 (0.0031)
Exhaust
0.030 - 0.063 (0.0012 - 0.0025)
0.09 (0.0035)
Projection length “L”
Intake
12.6 - 12.8 (0.496 - 0.504)
Exhaust
12.5 - 12.9 (0.492 - 0.508)
KBIA2555E
Items
Standard
Oversize [0.5 (0.020)] (Service)
Cylinder head seat recess diameter (D)
Intake
38.000 - 38.016 (1.4961 - 1.4967)
38.500 - 38.516 (1.5157 - 1.5164)
Exhaust
32.200 - 32.216 (1.2677 - 1.2683)
32.700 - 32.716 (1.2874 - 1.2880)
Valve seat interference fit
Intake
0.081 - 0.113 (0.0032 - 0.0044)
Exhaust
0.064 - 0.096 (0.0025 - 0.0038)
Valve seat diameter (d)
Intake
38.097 - 38.113 (1.4999 - 1.5005)
38.597 - 38.613 (1.5196 - 1.5202)
Exhaust
32.280 - 32.296 (1.2709 - 1.2715)
32.780 - 32.796 (1.2905 - 1.2912)
KBIA2541E
SERVICE DATA AND SPECIFICATIONS (SDS)
EM-113
< SERVICE DATA AND SPECIFICATIONS (SDS)
C
D
E
F
G
H
I
J
K
L
M
A
EM
N
P
O
CYLINDER BLOCK
Unit: mm (in)
PISTON, PISTON RING AND PISTON PIN
Available Piston
Free height mm (in)
50.58 (1.9913)
Pressure N (kg, lb) at height mm (in)
Installation
165.8 - 187.0 (16.9 - 19.1, 37 - 42) at 37.0 (1.457)
Valve open
314.8 - 355.0 (32.1 - 36.2, 71 - 80) at 28.2 (1.110)
Out-of-square mm (in)
Less than 2.2 (0.087)
Surface flatness
Standard
0.03 (0.0012)
LImit
0.1 (0.004)
Main bearing housing inside diameter
Standard
68.944 - 68.968 (2.7143 - 2.7153)
Cylinder bore diameter
Standard
Grade No. 1
98.000 - 98.010 (3.8583 - 3.8587)
Grade No. 2
98.010 - 98.020 (3.8587 - 3.8590)
Grade No. 3
98.020 - 98.030 (3.8590 - 3.8594)
Wear limit
0.20 (0.0079)
Out-of-round (Difference between X and Y)
Limit
0.015 (0.0006)
Taper (Difference between A and C)
0.010 (0.0004)
Main journal inside diameter grade (Without bearing)
Grade No. A
Grade No. B
Grade No. C
Grade No. D
Grade No. E
Grade No. F
Grade No. G
Grade No. H
Grade No. J
Grade No. K
Grade No. L
Grade No. M
Grade No. N
Grade No. P
Grade No. R
Grade No. S
Grade No. T
Grade No. U
Grade No. V
Grade No. W
Grade No. X
Grade No. Y
Grade No. 4
Grade No. 7
68.944 - 68.945 (2.7143 - 2.7144)
68.945 - 68.946 (2.7144 - 2.7144)
68.946 - 68.947 (2.7144 - 2.7144)
68.947 - 68.948 (2.7144 - 2.7145)
68.948 - 68.949 (2.7145 - 2.7145)
68.949 - 68.950 (2.7145 - 2.7146)
68.950 - 68.951 (2.7146 - 2.7146)
68.951 - 68.952 (2.7146 - 2.7146)
68.952 - 68.953 (2.7146 - 2.7147)
68.953 - 68.954 (2.7147 - 2.7147)
68.954 - 68.955 (2.7147 - 2.7148)
68.955 - 68.956 (2.7148 - 2.7148)
68.956 - 68.957 (2.7148 - 2.7148)
68.957 - 68.958 (2.7148 - 2.7149)
68.958 - 68.959 (2.7149 - 2.7149)
68.959 - 68.960 (2.7149 - 2.7150)
68.960 - 68.961 (2.7150 - 2.7150)
68.961 - 68.962 (2.7150 - 2.7150)
68.962 - 68.963 (2.7150 - 2.7151)
68.963 - 68.964 (2.7151 - 2.7151)
68.964 - 68.965 (2.7151 - 2.7152)
68.965 - 68.966 (2.7152 - 2.7152)
68.966 - 68.967 (2.7152 - 2.7152)
68.967 - 68.968 (2.7152 - 2.7153)
Difference in bore diameter between cylinders
Standard
Less than 0.03 (0.0012)
PBIC0123E
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