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
 












4-19-snyatie-shatunno-porshnevykh-sborok.html

4.19. Removal of shatunno-piston assemblages

Before to start extraction from the engine of shatunno-piston assemblages, it is necessary to remove a head () cylinders, the pallet картера and the oil pump with маслозаборной a tube.


 PERFORMANCE ORDER

  1. By means of a special vertical drill completely remove traces of step deterioration from the top part of cylinders — operate according to the instructions of the manufacturer enclosed to a vertical drill. The step is formed on piston stroke border, approximately in 6.4 mm under the top cut of the cylinder at the expense of mechanical development of metal and нагарообразования, to define its presence it is possible to the touch a finger nail. Attempts of extraction of shatunno-piston groups without removal of step development are fraught with damage of pistons.
  1. Having finished preparation of cylinders, turn the engine upside down so that the cranked shaft has appeared from above.
  2. Before to remove rods from a cranked shaft, estimate their size axial люфта on necks of the last. Densely enter an edge () measuring щупа in a backlash between a lateral wall of the bottom head of a rod and a crank cheek, completely having chosen люфт a rod on a shaft neck. The total thickness of the picked up edges щупа also will equal to size axial люфта a rod. Compare result of the spent measurement to requirements of Specifications. If the size axial люфта exceeds the limiting admissible value, the given rod is subject to replacement. Axial люфт a new rod, or old on new to a shaft, it can appear less than the bottom admissible limit, in this case the rod can be pierced — consult with experts of car-care centre. Serially check up all remained rods.
  3. Remove assemblage of covers of radical bearings (Removal of a cranked shaft see).
  1. Make sure available on the bottom heads of rods and their covers of identification labels of an accessory to the cylinder — do not mix number of a rod with marks of the size шатунного the bearing (Check of a condition of components of shatunno-piston group see). In stages (on 1/2 turns for the approach) ослабьте nuts of fastening of covers of the bottom heads of rods so that there was a possibility отворачивания them manually. Uncover the first rod together with the loose leaf of the bearing placed in it — try not to drop last.

    A — Number is beaten out on a joint of the bottom head of a rod with its cover with cylinder number — the given marks serve for definition of the size подшипникового apertures in a head
    B — (and covers of its bottom head) to the certain cylinder it is necessary to put Marks of an accessory of a rod independently with the help кернера before extraction of assemblages

A.

B.
  1. Take from the bottom head of a rod the loose leaf, then, having rested the wooden handle of a hammer against bearing bed in the bottom head, push out shatunno-piston assemblage at the top the cylinder at the top the block. At resistance occurrence immediately stop extraction of assemblage and check up completeness of removal of step deterioration in the top part of the cylinder.
  2. In a similar manner take from the engine the remained shatunno-piston assemblages.

Installation of a rod subject to extraction to coaxially cylinder is made by corresponding проворачивания a cranked shaft, — extraction start only after the rod will be located strictly in parallel a cylinder axis!

  1. In order to avoid casual mechanical damage of bearings and loss of components, establish into place loose leaves and fix covers of bearings on the bottom heads of the rods, by hand having tightened nuts.


On page back
4.18. Assemblage of a head of cylinders
On the following page
4.20. Removal of a cranked shaft