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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4.14. Alternative versions of schemes of recovery repair of the engine

During independent performance of capital repairs of the engine the reader will face need of the choice of the scheme of actions which is the most acceptable for it determining the total amount and the nature of the forthcoming work. Need of replacement of the block of the engine, conrod and piston groups and a bent shaft is defined by a set of various factors from which main thing is the condition of the block. Time and material inputs, existence of necessary spare parts, and also own qualification of the owner of the car as mechanics belong to number of the other parameters defining the choice of structure of the forthcoming works.

It is possible to select the following main schemes of carrying out capital repairs of the engine:

Repair and replacement of components in an individual order. If the condition of the block and the main internal components of the engine in the course of survey is found the satisfactory, most reasonable decision there will be a carrying out their service in an individual order. At the same time it is necessary to check carefully a condition of the block, a bent shaft and conrod and piston groups. Even at very insignificant degree of wear of the block, a mirror of its cylinders without fail are subject to a honingovaniye.

Use of a remkomplekt of a bent shaft. Set consists their pierced bent shaft and a set of repair rods with the pistons installed on them. Also piston rings and inserts of bearings are applied. Set can be intended for installation as in the block with cylinders of the standard size, and in the pierced assembly.

Use of the reduced set of the block of the engine. The reduced set includes the block of cylinders with already established in it by a bent shaft and conrod and piston groups. At the same time all bearings of a bent shaft are completed with new inserts, and their working gaps are precisely adjusted. Further such set is equipped additionally with the camshafts removed from the old engine, components of the valvate mechanism, a head of cylinders and hinged units without any global mechanical works.

Use of expanded set of the block of the engine. Expanded set represents the reduced set, plus the oil pump, the case pallet, a head of cylinders with a cover, the camshaft, components of the valvate mechanism and the GRM drive (cogwheels with a gas-distributing belt) with covers. All provided bearings, epiploons and laying are new, gaps are adjusted. It is necessary only to connect to the block the inlet pipeline with a final collector and hinged units.

Also the option of replacement of the engine assembled is possible. Many company HUNDRED offer similar service on exchange base changing the become useless units on new or restored.

Before stopping the choice on any of the listed schemes of performance of capital repairs of the engine and to start acquisition of the corresponding replaceable components, consult with specialists of car service and more skilled motorists.


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4.13. Removal, service and installation of the oil pump
on the following page"
4.15. An order of dismantling of the engine by preparation it to capital repairs