Infiniti Q45. Manual — part 574
SERVICE DATA AND SPECIFICATIONS (SDS)
EM-113
C
D
E
F
G
H
I
J
K
L
M
A
EM
Valve Lifter
Unit: mm (in)
Valve Spring
2.69 (0.1059)
269
2.70 (0.1063)
270
2.71 (0.1067)
271
2.72 (0.1071)
272
2.73 (0.1075)
273
2.74 (0.1079)
274
2.75 (0.1083)
275
2.76 (0.1087)
276
2.77 (0.1091)
277
2.78 (0.1094)
278
2.79 (0.1098)
279
2.80 (0.1102)
280
2.81 (0.1106)
281
2.82 (0.1110)
282
2.83 (0.1114)
283
2.84 (0.1118)
284
2.85 (0.1122)
285
2.86 (0.1126)
286
2.87 (0.1130)
287
2.88 (0.1134)
288
2.89 (0.1138)
289
2.90 (0.1142)
290
2.91 (0.1146)
291
2.92 (0.1150)
292
2.93 (0.1154)
293
2.94 (0.1157)
294
2.95 (0.1161)
295
Thickness
mm (in)
Identification mark
SEM966E
Items
Standard
Valve lifter outer diameter
33.965 - 33.975 (1.3372 - 1.3376)
Valve lifter hole diameter
34.000 - 34.016 (1.3386 - 1.3392)
Valve lifter clearance
0.025 - 0.051 (0.0010 - 0.0020)
Free height
mm (in)
46.35 - 46.85 (1.8247 - 1.8444)
Load
N (kg, lb) at height mm (in)
Installation
165 - 189 (16.8 - 19.3, 37 - 42) at 33.8 (1.331)
Valve open
290 - 330 (29.6 - 33.7, 65 - 74) at 24.4 (0.961)
Squareness
mm (in)
Limit
2.0 (0.079)
EM-114
SERVICE DATA AND SPECIFICATIONS (SDS)
Valve Guide
Unit: mm (in)
Valve Seat
Unit: mm (in)
Items
Standard
Service
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)
Standard
Limit
Valve guide clearance
Intake
0.020 - 0.046 (0.0008 - 0.0018)
0.08 (0.003)
Exhaust
0.030 - 0.056 (0.0012 - 0.0022)
0.10 (0.004)
Projection length “L”
Intake
10.1 - 10.3 (0.398 - 0.406)
—
Exhaust
10.0 - 10.4 (0.394 - 0.409)
—
PBIC0184E
Items
Standard
Service
Cylinder head seat recess diameter (D)
Intake
37.000 - 37.016 (1.4567 - 1.4573)
37.500 - 37.516 (1.4764 - 1.4770)
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 outer diameter (d)
Intake
37.097 - 37.113 (1.4605 - 1.4611)
37.597 - 37.613 (1.4802 - 1.4808)
Exhaust
32.280 - 32.296 (1.2709 - 1.2715)
32.780 - 32.796 (1.2905 - 1.2912)
PBIC2379E
SERVICE DATA AND SPECIFICATIONS (SDS)
EM-115
C
D
E
F
G
H
I
J
K
L
M
A
EM
CAMSHAFT AND CAMSHAFT BEARING
Unit: mm (in)
*: Total indicator reading
CYLINDER HEAD
Unit: mm (in)
Items
Standard
Limit
Camshaft runout [TIR*]
—
0.02 (0.0008)
Cam height “A”
Intake
44.865 - 45.055 (1.7663 - 1.7738)
Cam wear
Exhaust
43.925 - 44.115 (1.7293 - 1.7368)
0.2 (0.008)
Camshaft journal outer diameter
No.1
25.938 - 25.955 (1.0212 - 1.0218)
—
No.2, 3, 4, 5
25.953 - 25.970 (1.0218 - 1.0224)
—
Camshaft bracket inner diameter
26.000 - 26.021 (1.0236 - 1.0244)
—
Camshaft journal oil clearance
No.1
0.045 - 0.083 (0.0018 - 0.0033)
—
No.2, 3, 4, 5
0.030 - 0.068 (0.0012 - 0.0027)
—
Camshaft end play
0.115 - 0.188 (0.0045 - 0.0074)
—
Camshaft sprocket runout [TIR*]
—
0.15 (0.0059)
SEM671
Items
Standard
Limit
Cylinder head distortion
Less than 0.03 (0.0012)
0.1 (0.004)
PBIC0183E
EM-116
SERVICE DATA AND SPECIFICATIONS (SDS)
CYLINDER BLOCK
Unit: mm (in)
Distortion
Standard
Less than 0.03 (0.0012)
Limit
0.1 (0.004)
Cylinder bore
Inner diame-
ter
Standard
Grade No. 1
93.000 - 93.010 (3.6614 - 3.6618)
Grade No. 2
93.010 - 93.020 (3.6618 - 3.6622)
Grade No. 3
93.020 - 93.030 (3.6622 - 3.6626)
Wear limit
0.20 (0.0079)
Out-of-round (Difference between “X” and “Y”)
0.015 (0.0006)
Taper (Difference between “A” and “C”)
0.010 (0.0004)
Cylinder block main bearing
housing inner 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. 1
Grade No. 2
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 inner diameter
between cylinders
Standard
0.03 (0.0012)
PBIC0123E
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