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
 












4-20-snyatie-kolenchatogo-vala.html

4.20. Removal of a cranked shaft

Removal of a cranked shaft possibly only from the engine taken from the car. It is meant that the driving disk, a gas-distributing belt, the case pallet, a maslozabornik, the oil pump and shatunno-piston assemblies are already dismantled. Dismantle of assembly of covers of radical bearings should be made before removal of rods (see. Removal of shatunno-piston assemblies). 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 (see. Replacement of a back epiploon of a cranked shaft).


Order of an otpuskaniye of bolts of fastening of assembly of covers of radical bearings

 PERFORMANCE ORDER

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

Assembly 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 the longitudinal direction also is its axial люфт. Compare result of measurement to requirements of Specifications. If люфт exceeds the maximum admissible value, check on existence of signs of excessive wear persistent surfaces of a shaft. In the absence of obvious signs of wear replace the persistent (fourth) bearing, installation of new persistent washers usually helps to correct a situation.
  2. In the absence of near at hand tsiferblatny measuring instrument it is possible to use usual shchupy lezviyny type. Accurately shift a shaft against the stop forward on the engine, then define size of the formed gap between a cheek of a crank and a back wall of the persistent radical bearing, having densely planted in it the corresponding thickness an edge (I) щупа.
  3. Operating in strictly certain order (see an illustration the Order of an otpuskaniye of bolts of fastening of assembly of covers of radical bearings), in stages (on 1/4 turns for an approach) weaken bolts of fastening of assembly of covers of radical bearings so that there was a possibility of their reversing manually. Remove assembly — try not to drop loose leaves of radical bearings.
  4. Carefully take a cranked shaft from the engine (use the help of the assistant). Track, that loose leaves of radical bearings remained in the beds in the block and covers. Establish assembly of covers on the block, then by hand tighten bolts of its fastening.


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4.19. Removal of shatunno-piston assemblies
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4.21. Cleaning of the block of the engine