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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4.18. Assemblage of a head of cylinders

Without dependence from that, the head went to a workshop for carrying out of service of valves, or not, before to start its assemblage, once again carefully check up cleanliness of all components.

After return of a head from a workshop in it valves with accompanying components will be already established. In this case it is necessary to lower corresponding of listed below procedures and at once to pass to installation of shaft and assemblages коромысел.

 PERFORMANCE ORDER

  1. First of all establish on directing plugs of valves of a saddle of their springs, then put on each of directing plugs new маслоотражательный a cap (Dismantling and check of a condition of a head of cylinders and components клапанного the mechanism see). Maslootrazhatelnye caps (inlet and final valves) "are put" on the directing plugs by cautious застукивания by a hammer through special the mandrel or a face head of the suitable size.

Stop застукивание a cap right after that as it completely "will sit down" on the plug - the further blows can lead to rubber damage. Track, that caps have not appeared are overwound on plugs.

  1. Moving from one end of a head to another, grease молибденсодержащей or assembly impellent greasing the first valve and plant it in a head. A valve core grease with pure impellent oil.
  2. With the help нониусного a calliper serially check up adjusting height of cores of each of valves (distance from a saddle of springs to a face surface of a core of the valve) (Dismantling and check of a condition of a head of cylinders and components клапанного the mechanism see).

If head repair was made in the car-care centre workshop, the given parametre already will be adjusted properly. If the result any of measurements exceeds admissible value under Specifications, replace the corresponding valve and repeat check. If valve replacement does not lead to situation correction, hence, the valve saddle is too deeply planted in a head and last is subject to replacement.

  1. Plant on a core клапанные springs and their plate.

Klapannye springs are established by coils with the truncated step to a head.

  1. The special tool compress springs, having lowered a plate, then plant in opened flute on a core of the valve crackers of the cutting lock.
  1. For the purpose of time fixing of crackers to release the tool grease them from the interior of dense greasing.
  1. Repeat procedure for the remained valves. Watch that all components were established strictly on the former places.
  2. Camshaft installation (ов) and assemblages коромысел is made after the head will be completed in the reduced set (Alternative variants of schemes of regenerative repair of the engine see).


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4.17. Recommendations about service of valves
On the following page»
4.19. Removal of shatunno-piston assemblages