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
 












4-17-rekomendacii-po-obsluzhivaniyu-klapanov.html

4.17. Recommendations about service of valves

In view of complexity of kind of work and need of use of the special equipment, performance of service of valves, directing plugs and saddles it will be most correct to charge them to the car-care center personnel.

By own strengths of the owner of the car such procedures, as head dismantling, primary cleaning and check of a condition of components of the klapanny mechanism can be made. Then it is necessary to collect and deliver a head for professional service in a car-care center workshop. Thus rather fair idea of volume of subjects to works is usually made and the approximate list of necessary replaceable components can be prepared.

Experts of a workshop will remove valves and klapanny springs from a head and will make necessary regenerative repair or replacement of worn-out components (valves, their saddles, directing plugs, springs, plates of springs and crackers of cutting locks). Replacement of maslootrazhatelny caps is without fail made. After assembly of components the adjusting height of klapanny springs will be checked. In case of need experts will make a head pro-point for the purpose of restoration of planeness of its interfaced surface.

After completion of professional repair of a head its condition usually corresponds to a condition of the new. Before installation on the engine be not too lazy to clean carefully once again a head, having completely removed from all her cavities and channels metal sawdust, traces of an abrasive and other small production garbage. All channels and openings blow the compressed air (do not forget to put on goggles).


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4.16. Dismantling and check of a condition of a head of cylinders and components of the klapanny mechanism
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4.18. Assembly of a head of cylinders