Service of the Infiniti QX4 since 1996 of release
1. Introduction
2. Maintenance instruction
3. Routine maintenance
4. Engine
4.1. Specifications
4.2. Check of compression pressure in cylinders
4.3. Diagnostics of a condition of the engine with use of the vacuum gage
4.4. Removal and installation of the engine
4.5. Removal and installation of the inlet pipeline
4.6. Replacement of a belt of the GRM drive
4.7. Removal, check of a state and installation of a head of cylinders
4.8. Replacement of a forward epiploon of a bent shaft
4.9. Removal, check of a state and installation of components of the valvate mechanism
4.10. Replacement of epiploons of camshafts
4.11. Replacement of a back epiploon of a bent 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 recovery repair of the engine
4.15. An order of dismantling of the engine by preparation it to capital repairs
4.16. Dismantling and check of a condition of a head of cylinders and components of the valvate mechanism
4.17. Recommendations about service of valves
4.18. Assembly of a head of cylinders
4.19. Removal of conrod and piston assemblies
4.20. Removal of a bent 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 conrod and piston group
4.25. Check of a condition of a bent shaft
4.26. Check of a state and selection of inserts of radical and conrod bearings of a bent shaft
4.27. Engine assembly order
4.28. Installation of piston rings
4.29. Installation of a bent shaft and check of working gaps of radical bearings
4.30. Installation of conrod and piston assemblies and check of size of working gaps in conrod bearings of a bent shaft
4.31. Trial start and a running in of the engine after capital repairs
5. Cooling system and heating
6. Feed and control systems
7. Systems of start and charge
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 the Head and in case of obligation of their performance are highlighted in bold type.


Scheme of an arrangement of cylinders

 

Characteristic

Value

Designation

VG33E

Type

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

Arrangement

Forward, longitudinal

GRM drive

Zubchatoremenny transfer

The number of valves on the cylinder

4

Working volume of cylinders, cm 3

3275

The developed power, 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 the illustration Scheme of an Arrangement of Cylinders)

1-2-3-4-5-6

Compression 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 of 2000 in a minute

4.2 — 4.6

Gap between teeths of external and internal gear wheels, mm

  • Extreme admissible working value

0.180

Gap between an external gear wheel and a pump housing, mm

  • Nominal rate

0.114 — 0.200

Axial side play of 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


Casting of a head

Characteristic

Value

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

106.80 — 107.20

Extreme admissible size of not planeness, mm

0.10

Extreme 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


The 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 valvate mechanism).


Valves and valvate springs

See Dismantling and check of a condition of a head of cylinders and components of the valvate 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


Valvate springs

Characteristic

Value

Free length, mm

  • Internal spring

44.10

  • External spring

51.20

The extreme admissible size of violation of a tortsovka, mm (see Dismantling and check of a condition of a head of cylinders and components of the valvate 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 the 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 of an axial side play of a shaft, mm

0.30 — 0.60

Extreme admissible size of a radial beating, mm

0.10

Height of cams, mm

38.943 — 39.133

Working gaps in bearings, mm

0.060

Extreme admissible size of a radial beating of a cogwheel, mm

0.10


Block of cylinders


Casting of the block

Characteristic

Value

Diameter of cylinders, mm

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

91.500 — 91.510

    • Dimensional group 2

91.511 — 91.520

    • Dimensional group 3

91.521 — 91.530

  • Cylinders No. No. 3 and 4
    • 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

Extreme admissible size of conicity of cylinders, mm

0.015

Extreme admissible size of ovality of cylinders, mm

0.015

Minimum admissible height, mm

Information is not provided

Extreme admissible size of not planeness, mm

0.10

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

0.20


Bent shaft and radical / conrod bearings


Bent shaft

Characteristic

Value

Size of an axial side play, mm

  • Nominal rate

0.05 — 0.17

  • Extreme admissible value

0.30

Size of a radial beating, mm

  • Nominal rate

0.025

  • Extreme admissible value

0.10


Radical bearings

Characteristic

Value

Diameter of necks, mm

  • Dimensional 0 group

62.967 — 62.975

  • Dimensional 1 group

62.959 — 62.967

  • Dimensional 2 group

62.951 — 62.959

Extreme admissible size of conicity of necks, mm

0.005

Extreme admissible size of ovality of necks, mm

0.005

Working gaps in bearings, mm

  • Nominal rate

0.028 — 0.056

  • Extreme admissible value

0.090


Conrod bearings

Characteristic

Value

Diameter of necks, mm

49.955 — 49.974

Extreme admissible size of conicity of necks, mm

0.005

Extreme admissible size of ovality of necks, mm

0.005

Working gaps in bearings, mm

  • Nominal rate

0.015 — 0.054

  • Extreme admissible value

0.090


Rods

Characteristic

Value

Diameters of nests of heads, mm

  • Top head

20.982 — 20.994

  • Lower head

53.000 — 53.013

Distance between centers nests, mm

154.10 — 154.20

The extreme admissible size of a bend is at 100 mm of length, mm

0.15

The extreme admissible size of twisting is at 100 mm of length, mm

0.30

Size of an axial side play, mm

  • Nominal rate

0.20 — 0.35

  • Extreme 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

  • Cylinders No. No. 3 and 4
    • 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

  • The first compression

0.20 — 0.40

  • The second compression

0.50 — 0.69

  • Oil scraper

0.20 — 0.69

Side gap of landing in a flute, mm

  • The first compression

0.024 — 0.076

  • The second compression

0.030 — 0.070

  • Oil scraper

0.015 — 0.185


Efforts of tightening of threaded connections, Nanometer

Connection type

Value

Fastening of a persistent plate of the camshaft

78 — 88

Bolt of fastening of a cogwheel of the camshaft

78 — 88

Nuts of the lower 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 bent shaft

191 — 211

Bolts of fastening of heads of cylinders (see the illustration Order of 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 the illustration Order of 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 — the return shown (see the illustration 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

  • Long

22 — 29

  • Short

6 — 8

Bolts of fastening of a cover of the oil pump

6 — 8

Cap of the reducing 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 — the 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 the illustration Order of 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 bent shaft

6 — 8

Bolts of fastening of a cover of the GRM drive

3 — 5

Screws of fastening of covers of GRM

3



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4. Engine
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4.2. Check of compression pressure in cylinders




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