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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4.14. Alternative variants of schemes of regenerative repair of the engine

During independent performance of major repairs of the engine the reader will face the necessity of a choice of the scheme of actions defining total amount and character of forthcoming work most comprehensible to it. Necessity of replacement of the block of the engine, shatunno-piston groups and a cranked shaft is defined by set of various factors the main thing from which is the block condition. To number of the other parametres defining a choice of structure of forthcoming works, concern time and material inputs, presence of necessary spare parts, and also own qualification of the owner of the car, as mechanics.

It is possible to allocate following basic schemes of carrying out of major repairs of the engine:

Repair and replacement of components in an individual order. If the condition of the block and the basic internal components of the engine in the course of survey is found by the satisfactory, most reasonable decision there will be a carrying out of their service in an individual order. Thus it is necessary to check up carefully a condition of the block, a cranked shaft and shatunno-piston groups. Even at very insignificant degree of deterioration of the block, a mirror of its cylinders without fail are subject хонингованию.

Use ремкомплекта a cranked shaft. The set consists their pierced cranked shaft and the complete set of repair rods with the pistons established on them. Piston rings and loose leaves of bearings are applied also. The set can be intended for installation as in the block with cylinders of the standard size, and in the pierced assemblage.

Use of the reduced set of the block of the engine. The reduced set includes the block of cylinders with already established in it cranked shaft and shatunno-piston groups. Thus all bearings of a cranked shaft are completed by new loose leaves, and their working backlashes are precisely adjusted. Further such set is equipped additionally with the camshafts removed from the old engine, components клапанного the mechanism, a head of cylinders and hinged units without any global mechanical works.

Use of the expanded set of the block of the engine. The expanded set represents the reduced set, plus the oil pump, the pallet картера, a head of cylinders with a cover, a camshaft, components клапанного the mechanism and drive ГРМ (cogwheels with газораспределительным a belt) with covers. All provided bearings, epiploons and linings are new, backlashes are adjusted. It is necessary to connect only to the block the inlet pipeline with a final collector and hinged units.

The variant of replacement of the engine in gathering is possible also. Many firm HUNDRED offer similar service on exchange base changing the become unfit for use units on new or restored.

Before to stop the choice on any of the listed schemes of performance of major repairs of the engine and to start acquisition of corresponding replaceable components, consult with experts of car-care centre and more skilled motorists.


On page back
4.13. Removal, service and installation of the oil pump
On the following page
4.15. An order of dismantling of the engine by its preparation for major repairs