Infiniti QX56 (Z62). Manual - part 674

EM-136

< SERVICE DATA AND SPECIFICATIONS (SDS) 

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

12.6 - 12.8 (0.496 - 0.504)

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

32.200 - 32.216 (1.2677 - 1.2683)

32.700 - 32.716 (1.2874 - 1.2880)*

4

Valve seat outer diameter “d”

Intake

38.097 - 38.113 (1.4999 - 1.5005)

—

Exhaust

32.280 - 32.296 (1.2709 - 1.2715)

32.780 - 32.796 (1.2906 - 1.2912)*

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

28.7 (1.130)

Diameter “d2”*

2

Intake

35.9 - 36.4 (1.413 - 1.433)

Exhaust

30.3 - 30.8 (1.193 - 1.213)

Angle “

α

1”

59 - 61

°

PBIC2745E

SERVICE DATA AND SPECIFICATIONS (SDS)

EM-137

< 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:0000000006289595

CYLINDER BLOCK

Unit: mm (in)

Angle “

α

2”

88

°

75

′

 - 90

°

25

′

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)

4.95 - 5.05 (0.1949 - 0.1988)*

4

Depth “H”

6.0 (0.236)

Item

Standard

Intake

Exhaust

Free height

47.28 mm (1.8614 in)

48.06 mm (1.8921 in)

Pressure 

Installation

166 - 188 N (16.9 - 19.2 kg, 37 - 42 lb)

at 41.0 mm (1.614 in) 

166 - 188 N (16.9 - 19.2 kg, 37 - 42 lb)

at 34.45 mm (1.3563 in)

Valve open

541 - 611 N (55.2 - 62.3 kg, 122 - 137 lb)

 at 29.6 mm (1.165 in)

320.1 - 360.1 N (32.7 - 36.7 kg, 72 - 81 lb) 

at 24.65 mm (0.9705 in)

Identification color

Light green

Light blue

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

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

0.2 (0.008)

Out-of-round 

Limit

0.015 (0.0006)

Taper 

0.010 (0.0004)

EM-138

< SERVICE DATA AND SPECIFICATIONS (SDS) 

SERVICE DATA AND SPECIFICATIONS (SDS)

AVAILABLE PISTON

Unit: mm (in)

PISTON RING

Unit: mm (in)

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. 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 inner diameter between cylinders

Standard

Less than 0.03 (0.0012)

Items

Standard

Oversize (Service) [0.2 (0.008)]

Piston skirt diameter “A”

Grade No. 1

97.980 - 97.990 (3.8575 - 3.8579)

—

Grade No. 2

97.990 - 98.000 (3.8579 - 3.8583)

—

Grade No. 3

98.000 - 98.010 (3.8583 - 3.8587)

—

Service

—

95.680 - 95.710 (3.7669 - 3.7681)

Items

Standard

Limit

“H” dimension

40.0 (1.5748)

—

Piston pin hole diameter

21.993 - 21.999 (0.8659 - 0.8661)

—

Piston to cylinder bore clearance

0.010 - 0.030 (0.0004 - 0.0012)

0.08 (0.0031)

PBIC0188E

Items

Standard

Limit

Side clearance

Top

0.040 - 0.080 (0.0016 - 0.0031)

0.11 (0.0043)

2nd

0.030 - 0.070 (0.0012 - 0.0028)

0.10 (0.0039)

Oil ring

0.015 - 0.185 (0.0006 - 0.00728)

0.22 (0.0087)

SERVICE DATA AND SPECIFICATIONS (SDS)

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PISTON PIN

Unit: mm (in)

CONNECTING ROD

Unit: mm (in)

*: After installing in connecting rod

CRANKSHAFT

End gap

Top

0.23 - 0.28 (0.0091 - 0.0110)

0.50 (0.0197)

2nd

0.50 - 0.65 (0.0197 - 0.0256)

0.84 (0.0331)

Oil (rail ring)

0.20 - 0.60 (0.0079 - 0.0236)

0.95 (0.0374)

Items

Standard

Limit

Piston pin outer diameter

21.989 - 21.995 (0.8657 - 0.8659)

—

Piston to piston pin oil clearance

0.002 - 0.006 (0.0001 - 0.0002)

—

Connecting rod bushing oil clearance

0.005 - 0.017 (0.0002 - 0.0007)

0.030 (0.0012)

Items

Standard

Limit

Center distance

154.45 - 154.55 (6.08 - 6.08)

—

Bend [per 100 (3.94)]

—

0.15 (0.0059)

Torsion [per 100 (3.94)]

—

0.30 (0.0118)

Connecting rod bushing inner diameter*

22.000 - 22.006 (0.8661 - 0.8664)

—

Connecting rod big end diameter (Without bearing)

Grade No. A

57.000 - 57.001 (2.2441 - 2.2441)

Grade No. B

57.001 - 57.002 (2.2441 - 2.2442)

Grade No. C

57.002 - 57.003 (2.2442 - 2.2442)

Grade No. D

57.003 - 57.004 (2.2442 - 2.2442)

Grade No. E

57.004 - 57.005 (2.2442 - 2.2443)

Grade No. F

57.005 - 57.006 (2.2443 - 2.2443)

Grade No. G

57.006 - 57.007 (2.2443 - 2.2444)

Grade No. H

57.007 - 57.008 (2.2444 - 2.2444)

Grade No. J

57.008 - 57.009 (2.2444 - 2.2444)

Grade No. K

57.009 - 57.010 (2.2444 - 2.2445)

Grade No. L

57.010 - 57.011 (2.2445 - 2.2445)

Grade No. M

57.011 - 57.012 (2.2445 - 2.2446)

Grade No. N

57.012 - 57.013 (2.2446 - 2.2446)

Side clearance

0.20 - 0.40 (0.0079 - 0.0158)

0.40 (0.0157)