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
 












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

4.25. Check of a condition of a bent shaft

 PERFORMANCE ORDER

  1. Remove with a grinding stone, a file or a scraper agnails from edges of oil openings.
  1. Wash out a bent shaft solvent, then carefully dry, having whenever possible used compressed air. Do not forget to clean a rigid brush oil openings. Then wash out them solvent.

When using compressed air do not forget to put on goggles!

  1. Check radical and conrod necks of a bent shaft for existence of zadir, cavities, cracks and signs of uneven wear.
  2. Examine all surface of a shaft on existence of cracks and other damages. For identification of the hidden cracks it is necessary to resort to magnetic powder defectoscopy — give a shaft to a workshop of car service.
  1. Measure by a micrometer diameters of radical and conrod necks of a shaft. You perform measurement of diameter of each neck in several points on length and perimeter that will allow to estimate the size of its conicity and ovality which should not exceed the limit of admissible range (see Specifications).
  1. It is necessary to estimate also the size of a beating of a bent shaft — pair of V-shaped blocks and the digital measuring instrument of plunger type will be required. In the absence of necessary stock ask for the help specialists of car service.
  1. In case wear / conicity / ovality of necks exceeds admissible size, or mechanical damages of surfaces take place, the bent shaft should be given to a pro-point. After a pro-point of a shaft it is necessary to pick up new inserts of radical and/or conrod bearings of the corresponding repair size.
  1. Check a condition of omental necks on both pins of a bent shaft. Existence of the developed flutes, agnails or zadir will lead to an exit of new epiploons out of operation in the near future. In certain cases pins can be restored by a pro-point and a napressovka on them special thin-walled plugs. If such recovery repair is not possible, replace a shaft.
  1. Check a condition of inserts of radical and conrod bearings (see Check of a state and selection of inserts of radical and conrod bearings of a bent shaft).


"on the page back
4.24. Check of a condition of components of conrod and piston group
on the following page"
4.26. Check of a state and selection of inserts of radical and conrod bearings of a bent shaft