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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4.15. An order of dismantling of the engine by its preparation for major repairs


The scheme of an arrangement of hinged units


Design of the block of cylinders

 

Most easier to carry out engine dismantling, having established it on the portable assembly stand. The such adaptation always can be borrowed rather cheaply in a car-care centre workshop. Before to fix the engine at the stand, it is necessary to remove from it a flywheel / приводной a disk.

If possibility to take advantage of the stand is absent, dismantling should be made, having placed the engine on a strong workbench, or reliably having arranged it on firm to a garage floor. At work without the stand watch that the engine casually has not overturned.

If it is planned to make replacement of the engine on restored, remove with old all hinged units and external components and transfer them on the replaceable block. In number such, subject to shift, components enter (illustrations the Scheme of an arrangement of hinged units and the Design of the block of cylinders) see:

  • The generator with arms;
  • The steering pump with arms;
  • Components of systems of decrease in toxicity of the fulfilled gases;
  • The distributor, ВВ wires and spark plugs;
  • The thermostat with a casing cover;
  • Perepusknoj branch pipe / a hose of the water pump;
  • Components of system of injection of fuel;
  • The inlet pipeline and final collector ();
  • The oil filter
  • Support of a suspension bracket of the power unit;
  • Flywheel / приводной a disk.

At removal from the old engine of external components try to remember prominent features of their installation. Fix in a notebook landing positions of linings, epiploons, remote rings and plugs, pins, arms, washers, bolts and other fine details.

At a choice of the scheme with use of the reduced set of the block consisting of the block of cylinders with established in it by cranked shaft and shatunno-piston groups, remove from the old unit also a head of cylinders, the pallet картера and the oil pump (alternative variants of schemes of performance of major repairs — see Alternative variants of schemes of regenerative repair of the engine).

At carrying out of full major repairs of the old unit, make its dismantling and take all internal components. The optimum order of performance of procedure of dismantling of the engine is more low resulted:

  • The inlet pipeline and final collectors;
  • Covers of heads of cylinders;
  • Covers of drive ГРМ with bolts;
  • Drive ГРМ (газораспределительный a belt with cogwheels);
  • Assemblages коромысел and camshafts;
  • Heads of cylinders;
  • The water pump;
  • The pallet картера;
  • Маслозаборник with the mesh filter;
  • Forward cover / the oil pump;
  • Assemblage of covers of radical bearings;
  • Shatunno-piston assemblages;
  • Cranked shaft and radical bearings.

Before to start engine dismantling, prepare following materials, tools and details (the engine Assembly order see also):

  • Standard set of the metalwork tool;
  • Set of cardboard or plastic containers / of polyethylene packages for the organised storage of small components;
  • Scraper for зачистки interfaced surfaces;
  • Vertical drill for removal of step deterioration in the top part of cylinders;
  • Stripper for dismantle демпфера крутильных fluctuations;
  • Set of micrometers;
  • Telescopic нутромер;
  • Tsiferblatnyj measuring instrument плунжерного type (DTI);
  • The tool for compression клапанных springs;
  • Хон for processing of mirrors of cylinders;
  • The tool for procleaning of flutes under installation of piston rings;
  • Electrodrill;
  • Set of taps and лерок;
  • Wire brushes;
  • Cylindrical brushes for procleaning of oil galleries;
  • Solvent.

On page back
4.14. Alternative variants of schemes of regenerative repair of the engine
On the following page
4.16. Dismantling and check of a condition of a head of cylinders and components клапанного the mechanism