Service Infiniti QX4 since 1996 of release
1. Introduction
2. The maintenance instruction
3. Routine maintenance
4. The engine
4.1. Specifications
4.2. Check компрессионного pressure in cylinders
4.3. Diagnostics of a condition of the engine with vacuum gauge application
4.4. Removal and engine installation
4.5. Removal and installation of the inlet pipeline
4.6. Replacement of a belt of drive ГРМ
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 клапанного the mechanism
4.10. Replacement of epiploons of camshafts
4.11. Replacement of a back epiploon of a cranked shaft
4.12. Removal and pallet installation картера
4.13. Removal, service and installation of the oil pump
4.14. Alternative variants of schemes of regenerative repair of the engine
4.15. An order of dismantling of the engine by its preparation for major repairs
4.16. Dismantling and check of a condition of a head of cylinders and components клапанного the mechanism
4.17. Recommendations about service of valves
4.18. Assemblage of a head of cylinders
4.19. Removal of shatunno-piston assemblages
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. Хонингование 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 radical and шатунных bearings of a cranked shaft
4.27. An engine assembly order
4.28. Installation of piston rings
4.29. Installation of a cranked shaft and check of working backlashes of radical bearings
4.30. Installation of shatunno-piston assemblages and check of size of working backlashes in шатунных bearings of a cranked shaft
4.31. Trial start and обкатка the engine after major repairs
5. Cooling and heating systems
6. Power supply systems and managements
7. Start and charge systems
8. A transmissionnaja line
9. Brake system
10. A suspension bracket and a steering
11. A body
12. An electric equipment
 












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4.7. Removal, check of a condition and installation of a head of cylinders


Order release fixture of covers ГРМ

 

 PERFORMANCE ORDER

  1. Dump pressure in the power supply system (Check компрессионного pressure in cylinders see).
  2. Remove газораспределительный a belt (Replacement of a belt of drive ГРМ see).

In order to avoid damage of pistons and valves do not turn cranked and distributive shaft at the removed belt of drive ГРМ!

  1. Empty cooling system (Routine maintenance see the Head).
  2. Disconnect from a collector of the inlet pipeline cables of a drive throttle заслонки and темпостата.
  3. Remove the inlet pipeline (Removal and installation of the inlet pipeline see).
  4. Remove cogwheels of camshafts and a back cover of drive ГРМ.
  5. Remove the distributor of ignition with ВВ electroconducting.
  6. Remove the steering pump and compressor K/V, — without disconnecting hydraulic / refrigerator lines, shift components aside and fix their wire.
  7. Отсоедиинте from final collectors of the engine reception pipes of system of release of the fulfilled gases.
  8. Operating in strictly certain order (the Order release fixture of covers ГРМ see an illustration), release fixing bolts and uncover газораспределительного the mechanism.
  1. Operating in an order, the return to a tightening order, in two-three receptions in regular intervals release bolts of fastening of a head of cylinders.
  1. Remove a head of cylinders in gathering with a final collector.
  2. In case of need remove from a head a final collector.
  3. If it is required, take camshafts (Removal, check of a condition and installation of components клапанного the mechanism see).


Check

 PERFORMANCE ORDER

  1. By means of a steel ruler established on an edge and щупа лезвийного type estimate planeness interfaced to the block of cylinders of a surface of a head, — in case of need give a head in проточку, or replace it.

Проточка it can be made only in the event that the head height will not appear less than limiting admissible value (Specifications see).


The total thickness of the ground off layer of interfaced surfaces of a head and the block should not exceed 0.20 mm!


Installation


Order of a tightening of bolts of fastening of final collectors


Order of a tightening of bolts of fastening of heads of cylinders

 

 PERFORMANCE ORDER

  1. If removed, establish into place camshafts, — operate in an order, the return to an order of dismantle of components.
  2. Having turned a cranked shaft, result the engine in position ВМТ of the end of a step of compression of the first cylinder (Replacement of a belt of drive ГРМ see).

It is considered the first forward of the right number of cylinders (Specifications see).

  1. Make sure of correctness of combination of an adjusting label of a cogwheel of a cranked shaft with reciprocal риской on the case of the oil pump.

  1. Track, that camshafts have been developed by directing pins to the top cut of a head.

  1. If removed, establish on a head a final collector. Screw fixing bolts and, operating in strictly certain order (the Order of a tightening of bolts of fastening of final collectors see an illustration), in regular intervals tighten them with demanded effort.
  2. Establish a lining and press a head to the block of cylinders.

In order to avoid damage of valves and pistons, do not turn distributive and cranked shaft!

  1. Make sure that washers are put on bolts of fastening of a head, — at a corresponding design of washers they should be established by facets to heads of bolts and a plane to a head.

  1. Grease carving surfaces and the bottom cuts of heads of bolts with impellent oil, then screw them and, operating in strictly certain order (the Order of a tightening of bolts of fastening of heads of cylinders see an illustration), in stages tighten with demanded effort.

For fastening of heads bolts of various length are used! Longer bolts (L1) are established in positions 4, 7 and 9.

  1. Installation of the remained components is made in an order, the return to an order of their dismantle, — do not forget to grease before landing by hermetic an interfaced surface of cover ГРМ. Track, that all fixture was tightened with demanded effort.


On page back
4.6. Replacement of a belt of drive ГРМ
On the following page
4.8. Replacement of a forward epiploon of a cranked shaft