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
 












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4.17. Recommendations about service of valves

In view of complexity of a kind of work and necessity of application of the special equipment, performance of service of valves, their directing plugs and saddles will charge most correctly to the car-care centre personnel.

Own forces of the owner of the car such procedures, as head dismantling, primary cleaning and check of a condition of components клапанного the mechanism can be made. Then it is necessary to collect and deliver a head for professional service in a car-care centre workshop. Thus enough fair idea about volume of works subject to performance is usually made and the approximate list of necessary replaceable components can be prepared.

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

After end 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, completely having removed from all its cavities and channels metal sawdust, traces of an abrasive and other small industrial dust. All channels and apertures blow compressed air (do not forget to put on goggles).


On page back
4.16. Dismantling and check of a condition of a head of cylinders and components клапанного the mechanism
On the following page
4.18. Assemblage of a head of cylinders