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
 












4-20-snyatie-kolenchatogo-vala.html

4.20. Removal of a cranked shaft

Removal of a cranked shaft probably only from the engine taken from the car. It is meant that приводной a disk, газораспределительный a belt, the pallet картера, маслозаборник, the oil pump and shatunno-piston assemblages are already dismantled. Dismantle of assemblage of covers of radical bearings should be made before removal of rods (Removal of shatunno-piston assemblages see). Before removal of a cranked shaft it is necessary also отболтить and to separate from the block of cylinders the holder of a back epiploon (Replacement of a back epiploon of a cranked shaft see).


Order release bolts of fastening of assemblage of covers of radical bearings

 PERFORMANCE ORDER

  1. Before to start extraction of a cranked shaft from the engine, measure its size axial люфта. Fix циферблатный a measuring instrument плунжерного type (DTI) on the block to coaxially cranked shaft, having rested it плунжер against a cheek of one of cranks.

Assemblage of covers of radical bearings should remain on the place, and its fixture will tighten with demanded effort.

  1. Push a cranked shaft against the stop back and null the device indicator. Now push a shaft in an opposite direction and consider the measuring instrument indication. The size of a free wheeling of a shaft in a longitudinal direction also is its axial люфт. Compare result of measurement to requirements of Specifications. If люфт exceeds the maximum admissible value, check up on presence of signs of excessive deterioration persistent surfaces of a shaft. In the absence of obvious signs of deterioration replace the persistent (fourth) bearing, installation of new persistent washers usually helps to correct a situation.
  2. At absence near at hand циферблатного a measuring instrument it is possible to take advantage usual щупом лезвийного type. Accurately shift a shaft against the stop forward on the engine, then define size of the formed backlash between a cheek of a crank and a back wall of the persistent radical bearing, densely having planted in it of a corresponding thickness an edge () щупа.
  3. Operating in strictly certain order (the Order release bolts of fastening of assemblage of covers of radical bearings see an illustration), in stages (on 1/4 turns for the approach) ослабьте bolts of fastening of assemblage of covers of radical bearings so that there was a possibility of their reversing manually. Remove assemblage, — try not to drop loose leaves of radical bearings.
  4. Cautiously take a cranked shaft from the engine (take advantage of the help of the assistant). Track, that loose leaves of radical bearings remained in the beds in the block and covers. Establish assemblage of covers on the block, then by hand tighten bolts of its fastening.


On page back
4.19. Removal of shatunno-piston assemblages
On the following page
4.21. Cleaning of the block of the engine