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
 












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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, the directing plugs and saddles it will be most correct to charge them to personnel of car service.

Such procedures as dismantling of a head, primary cleaning and check of a condition of components of the valvate mechanism can be made by own forces of the owner of the car. Then it is necessary to collect and deliver a head for professional service in a workshop of car service. At the same time rather fair idea of the volume of subjects to performance of work usually is formed and the approximate list of necessary replaceable components can be prepared.

Experts of a workshop will remove valves and valvate springs from a head and will make necessary recovery repair or replacement of worn-out components (valves, their saddles, the 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 valvate 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 state usually corresponds to a condition of new. Before installation on the engine be not too lazy to clean once again carefully a head, having completely removed metal sawdust, traces of an abrasive and other small production garbage from all her cavities and channels. Blow all channels and openings 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 valvate mechanism
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4.18. Assembly of a head of cylinders




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