Infiniti QX4 service since 1996 of release
1. Introduction
2. Maintenance instruction
3. Routine maintenance
4. Engine
4.1. Specifications
4.2. Check of kompressionny pressure in cylinders
4.3. Diagnostics of a condition of the engine with use of the vacuum gage
4.4. Removal and engine installation
4.5. Removal and installation of the inlet pipeline
4.6. Replacement of a belt of a drive of GRM
4.7. Removal, check of a condition and installation of a head of cylinders
4.8. Replacement of a forward epiploon of a cranked shaft
4.9. Removal, check of a condition and installation of components of the klapanny mechanism
4.10. Replacement of epiploons of camshafts
4.11. Replacement of a back epiploon of a cranked shaft
4.12. Removal and installation of the pallet of a case
4.13. Removal, service and installation of the oil pump
4.14. Alternative versions of schemes of regenerative repair of the engine
4.15. An order of dismantling of the engine by its preparation for major maintenance
4.16. Dismantling and check of a condition of a head of cylinders and components of the klapanny mechanism
4.17. Recommendations about service of valves
4.18. Assembly of a head of cylinders
4.19. Removal of shatunno-piston assemblies
4.20. Removal of a cranked shaft
4.21. Cleaning of the block of the engine
4.22. Check of a condition of the block of the engine
4.23. Honingovaniye of mirrors of cylinders
4.24. Check of a condition of components of shatunno-piston group
4.25. Check of a condition of a cranked shaft
4.26. Check of a condition and selection of loose leaves of radical and shatunny bearings of a cranked shaft
4.27. Engine assembly order
4.28. Installation of piston rings
4.29. Installation of a cranked shaft and check of working gaps of radical bearings
4.30. Installation of shatunno-piston assemblies and check of size of working gaps in shatunny bearings of a cranked shaft
4.31. Trial start and an engine running in after major maintenance
5. Cooling and heating systems
6. Power supply systems and managements
7. Start and charge systems
8. Transmission line
9. Brake system
10. Suspension bracket and steering
11. Body
12. Electric equipment
 












4-1-specifikacii.html

4.1. Specifications

Separate parameters are specified also in the text of Head and in case of obligation of their performance are allocated with a bold print.


Scheme of an arrangement of cylinders

 

Characteristic

Value

Designation

VG33E

Type

Petrol, 4-тактный, 6-cylinder (  V6 x 60 °), DOHC

Arrangement

Forward, longitudinal

GRM drive

Zubchatoremenny transfer

Number of valves on the cylinder

4

Working volume of cylinders, cm 3

3275

The developed capacity, h.p.

168 (125) at 4800 rpm

Torque, Nanometer

266 at 2800 rpm

Diameter of cylinders, mm

91.5

Course of pistons, mm

83.0

Ignition order (see an illustration the Scheme of an arrangement of cylinders)

1-2-3-4-5-6

Kompressionnoye pressure in cylinders, kgf/cm 2

  • Nominal rate

12.1

  • Minimum admissible value

9.0

  • The maximum admissible difference between cylinders

1.0

Extent of compression

8.9:1

Power supply system

The distributed consecutive injection (SFI)


Oil pump

Characteristic

Value

Pressure of oil, kgf/cm 2

  • On single turns

0.6

  • At turns 2000 in a minute

4.2 — 4.6

Gap between teeths of external and internal gear wheels, mm

  • Limiting admissible working value

0.180

Gap between an external gear wheel and the case of the pump, mm

  • Nominal rate

0.114 — 0.200

Axial люфт gear wheels in the case, mm

  • External gear wheel

0.050 — 0.109

  • Internal gear wheel

0.050 — 0.090

Gap of landing of a ledge of an internal gear wheel in a nest of the case, mm

0.045 — 0.091


Head of cylinders


Head molding

Characteristic

Value

Adjusting height of a head, mm (see. Removal, check of a condition and installation of a head of cylinders)

106.80 — 107.20

Limiting admissible size of not planeness, mm

0.10

Limiting admissible total depth of a pro-point (block + head), mm

0.20


Saddles of valves

See illustrations Under control parameters of saddles of inlet valves and Under control parameters of saddles of final valves.

Characteristic

Value

Tilt angle of a working facet, hail

45

Width of a working facet, mm

  • Inlet valves

1.75

  • Final valves

1.70

Diameter of a landing nest, mm

  • Inlet valves

44.500 — 44.516

  • Final valves

37.500 — 37.516


Directing plugs of valves

Characteristic

Value

Diameter of a landing nest, mm

  • Inlet valves

11.175 — 11.196

  • Final valves

12.175 — 12.196

Internal diameter, mm

  • Inlet valves

7.000 — 7.018

  • Final valves

8.000 — 8.011

Adjusting height of a vystupaniye *, mm

13.20 — 13.40

Gaps of landing of cores of valves, mm

  • Inlet valves

0.020 — 0.053

  • Final valves

0.040 — 0.049


* It is measured from the top cut of the plug to a surface of a saddle of an external spring at the removed adjusting washer (see. Dismantling and check of a condition of a head of cylinders and components of the klapanny mechanism).


Valves and klapanny springs

See. Dismantling and check of a condition of a head of cylinders and components of the klapanny mechanism.


Inlet valves

Characteristic

Value

Tilt angle of a working facet, hail

45°15' — 45°45'

Diameter of a plate, mm

41.95 — 42.25

Minimum admissible width of a cylindrical part of a plate, mm

0.50

Minimum admissible length, mm

125.30

Diameter of a core, mm

6.965 — 6.980

Maximum admissible depth of a face pro-point of a shaft, mm

0.20


Final valves

Characteristic

Value

Tilt angle of a working facet, hail

45°15' — 45°45'

Diameter of a plate, mm

35.00 — 35.20

Minimum admissible width of a cylindrical part of a plate, mm

0.50

Minimum admissible length, mm

124.20

Diameter of a core, mm

7.962 — 7.970

Maximum admissible depth of a face pro-point of a shaft, mm

0.20


Klapannye of a spring

Characteristic

Value

Free length, mm

  • Internal spring

44.10

  • External spring

51.20

Limiting admissible size of violation of a tortsovka, mm (see. Dismantling and check of a condition of a head of cylinders and components of the klapanny mechanism)

  • Internal spring

1.90

  • External spring

2.20

Effort of compression, kgf/mm

  • Internal spring

26/25

  • External spring

74.7/30


Pushers of valves

Characteristic

Value

Diameter of a landing nest, mm

16.000 — 16.013

Diameter of a pusher, mm

15.947 — 145.957

Landing gap, mm

0.043 — 0.066


Camshafts

See an illustration Identification of bearing necks of camshafts and dimensional characteristics for definition of gaps in bearings.

Characteristic

Value

Diameter of bearings, mm

  • Under a neck "And"

47.000 — 47.025

  • Under a neck "In"

42.500 — 42.525

  • Under a neck "With"

48.000 — 48.025

Diameter of necks, mm

  • Neck "And"

46.920 — 46.94

  • Neck "In"

42.420 — 42.440

  • Neck "With"

47.920 — 47.940

Size axial люфта shaft, mm

0.30 — 0.60

Limiting admissible size of radial palpation, mm

0.10

Height of cams, mm

38.943 — 39.133

Working gaps in bearings, mm

0.060

Limiting admissible size of radial palpation of a cogwheel, mm

0.10


Block of cylinders


Block molding

Characteristic

Value

Diameter of cylinders, mm

  • Except No. No. 3 and 4 cylinders
    • Dimensional group 1

91.500 — 91.510

    • Dimensional group 2

91.511 — 91.520

    • Dimensional group 3

91.521 — 91.530

  • No. No. 3 and 4 cylinders
    • Dimensional group 1

91.500 — 91.505

    • Dimensional group 2

91.506 — 91.510

    • Dimensional group 3

91.511 — 91.515

    • Dimensional group 4

91.516 — 91.520

    • Dimensional group 5

91.521 — 91.525

    • Dimensional group 6

91.526 — 91.530

Limiting admissible size of a konusnost of cylinders, mm

0.015

Limiting admissible size of ovality of cylinders, mm

0.015

Minimum admissible height, mm

Information is not provided

Limiting admissible size of not planeness, mm

0.10

Limiting admissible total depth of a pro-point (block + head), mm

0.20


Cranked shaft and radical / shatunny bearings


Cranked shaft

Characteristic

Value

Size axial люфта, mm

  • Nominal rate

0.05 — 0.17

  • Limiting admissible value

0.30

Size of radial palpation, mm

  • Nominal rate

0.025

  • Limiting admissible value

0.10


Radical bearings

Characteristic

Value

Diameter of necks, mm

  • Dimensional group "0"

62.967 — 62.975

  • Dimensional group "1"

62.959 — 62.967

  • Dimensional group "2"

62.951 — 62.959

Limiting admissible size of a konusnost of necks, mm

0.005

Limiting admissible size of ovality of necks, mm

0.005

Working gaps in bearings, mm

  • Nominal rate

0.028 — 0.056

  • Limiting admissible value

0.090


Shatunnye bearings

Characteristic

Value

Diameter of necks, mm

49.955 — 49.974

Limiting admissible size of a konusnost of necks, mm

0.005

Limiting admissible size of ovality of necks, mm

0.005

Working gaps in bearings, mm

  • Nominal rate

0.015 — 0.054

  • Limiting admissible value

0.090


Rods

Characteristic

Value

Diameters of nests of heads, mm

  • Top head

20.982 — 20.994

  • Bottom head

53.000 — 53.013

Distance between centers nests, mm

154.10 — 154.20

Limiting admissible size of a bend on 100 mm of length, mm

0.15

Limiting admissible size of twisting on 100 mm of length, mm

0.30

Size axial люфта, mm

  • Nominal rate

0.20 — 0.35

  • Limiting admissible value

0.40


Pistons and piston rings


Pistons

Characteristic

Value

Landing gaps in cylinders, mm

  • Except No. No. 3 and 4

0.025 — 0.045

  • No. No. 3 and 4

0.015 — 0.025

Diameter, mm

  • Except No. No. 3 and 4
    • Dimensional group 1

91.465 — 91.475

    • Dimensional group 2

91.475 — 91.485

    • Dimensional group 3

91.485 — 91.495

    • With excess on 0.25 mm

91.715 — 91.745

    • With excess on 0.50 mm

91.965 — 91.995

  • No. No. 3 and 4 cylinders
    • Dimensional group 2-1

91.480 — 91.185

    • Dimensional group 3-2

91.485 — 91.490

    • Dimensional group 3-3

91.490 — 91.495

    • Dimensional group 4-4

91.495 — 91.500

    • Dimensional group 4-5

91.500 — 91.505

    • Dimensional group 5-6

91.505 — 91.510

    • With excess on 0.25 mm

91.715 — 91.745

    • With excess on 0.50 mm

91.965 — 91.995


Piston fingers

Characteristic

Value

Diameter, mm

20.971 — 20.983

Landing in the piston, mm

0 — 0.004 (in a tightness)

Landing in a rod, mm

0.005 — 0.017


Piston rings

Characteristic

Value

Gap in the lock, mm

  • First kompressionny

0.20 — 0.40

  • Second kompressionny

0.50 — 0.69

  • Maslosjemnoye

0.20 — 0.69

Lateral gap of landing in a flute, mm

  • First kompressionny

0.024 — 0.076

  • Second kompressionny

0.030 — 0.070

  • Maslosjemnoye

0.015 — 0.185


Efforts of a tightening of carving connections, Nanometer

Connection type

Value

Fastening of a persistent plate of a camshaft

78 — 88

Bolt of fastening of a cogwheel of a camshaft

78 — 88

Nuts of the bottom heads of rods

  • Stage 1

14 — 16

  • Stage 2

To hold on on a corner of 60 — 65 degrees

Bolt of a pulley of a cranked shaft

191 — 211

Bolts of fastening of heads of cylinders (see an illustration the Order of a tightening of bolts of fastening of heads of cylinders)

  • Stage 1

29

  • Stage 2

59

  • Stage 3

To release everything

  • Stage 4

29

  • Stage 5

To hold on on a corner of 60 — 65 degrees

Bolts of fastening of support of a suspension bracket of the power unit to the block of cylinders

43 — 55

Bolts / nut of fastening of final collectors (see an illustration the Order of a tightening of bolts of fastening of final collectors)

28 — 33

Bolts of fastening of the distributor of ignition

14 — 18

Bolts of fastening of a driving disk

83 — 93

Bolts of fastening of the inlet pipeline

18 — 22

Bolts of fastening of assembly of covers of radical bearings (a tightening order — return shown (see an illustration the Order of an otpuskaniye of bolts of fastening of assembly of covers of radical bearings))

90 — 100

Drain stopper of the pallet of a case

29 — 39

Bolt of fastening of a maslozaborny tube to pump assembly

16 — 17

Bolts of fastening of the oil pump to the block of cylinders

  • The long

22 — 29

  • The short

6 — 8

Bolts of fastening of a cover of the oil pump

6 — 8

Cap of the reduktsionny valve

39 — 69

Bolts of fastening of assemblies of axes of yokes

18 — 22

Bolt / nut of a natyazhitel of a gas-distributing belt

43 — 58

Bolts of fastening of the water pump

12 — 15

Bolts / nut of fastening of the inlet pipeline (a tightening order — return shown (see. Removal and installation of the inlet pipeline))

  • Stage 1

4

  • Stage 2

8 — 10

Bolts of fastening of the pallet of a case (see an illustration the Order of a tightening of bolts of fastening of the pallet of a case)

7 — 8

Bolts of fastening of the holder of a back epiploon of a cranked shaft

6 — 8

Bolts of fastening of a cover of a drive of GRM

3 — 5

Screws of fastening of covers of GRM

3



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4.2. Check of kompressionny pressure in cylinders