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
 












4-25-proverka-sostoyaniya-kolenchatogo-vala.html

4.25. Check of a condition of a cranked shaft

 PERFORMANCE ORDER

  1. Grinding stone, надфилем or a scraper remove agnails from edges of oil apertures.
  1. Wash out a cranked shaft solvent, then carefully dry, whenever possible having taken advantage of compressed air. Do not forget to clean a rigid brush oil apertures. Then wash out their solvent.

At use of compressed air do not forget to put on goggles!

  1. Check up radical and шатунные necks of a cranked shaft on presence задиров, cavities, cracks and signs of non-uniform deterioration.
  2. Examine all surface of a shaft on presence of cracks and other damages. For revealing of the latent cracks it is necessary to resort to магнитопорошковой дефектоскопии, — give a shaft to a car-care centre workshop.
  1. By micrometer measure diameters radical and шатунных shaft necks. Measurement of diameter of each neck make in several points on length and perimetre that will allow to estimate its size конусности and ovality which should not fall outside the limits an admissible range (see Specifications).
  1. It is necessary to estimate also size of palpation of a cranked shaft, — be required pair of V-shaped blocks and a digital measuring instrument плунжерного type. In the absence of necessary stock address for the help to experts of car-care centre.
  1. In case deterioration / konusnost/ovality of necks exceeds admissible size, or mechanical damages of surfaces take place, it is necessary to give a cranked shaft in проточку. After проточки a shaft it is necessary to pick up new loose leaves radical and-or шатунных bearings of the corresponding repair size.
  1. Check up a condition сальниковых necks on both pins of a cranked shaft. Presence of the developed flutes, agnails or задиров will lead to an exit of new epiploons out of operation in the near future. In certain cases pins can be restored a way проточки and напрессовки on them of special thin-walled plugs. If such regenerative repair is not obviously possible, replace a shaft.
  1. Check up a condition of loose leaves radical and шатунных bearings (Check of a condition and selection of loose leaves radical and шатунных bearings of a cranked shaft see).


On page back
4.24. Check of a condition of components of shatunno-piston group
On the following page
4.26. Check of a condition and selection of loose leaves radical and шатунных bearings of a cranked shaft