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)

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< SERVICE DATA AND SPECIFICATIONS (SDS) 

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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) 

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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