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
 












4-6-zamena-remnya-privoda-grm.html

4.6. Replacement of a belt of drive ГРМ

Do not bend and do not overwind a belt!
After removal газораспределительного a belt do not turn cranked and camshafts in order to avoid damage of internal components of the engine as a result of an input of blow of valves about the bottoms of pistons!
Before belt installation carefully clear all cogwheels of drive ГРМ, completely having removed from them a dirt, greasing and a moisture!
Installation газораспределительного a belt should be made on the cold engine!


Details of installation of components of drive ГРМ


Removal

 PERFORMANCE ORDER

  1. Cock a lay brake, prop up back wheels противооткатными boots, then поддомкратьте redock of the car and establish it on props (the Scheme of an institution of props for car fixing in the lifted position see an illustration). At a corresponding complete set remove protection картера.
  2. Empty a radiator, — try not to admit hits of a cooling liquid on приводные belts.
  3. Remove a radiator.
  4. Remove the fan of system of cooling and a pulley of the water pump.
  5. Remove belts of a drive of the steering pump, compressor K/V and the generator.
  6. Turn out all spark plugs.
  7. Remove a distributor filter.
  8. Remove a basic arm of an intermediate roller of a belt of a drive of compressor K/V.
  9. Lift the receiver connecting cover газораспределительного the mechanism with an air inlet sleeve.
  10. Remove the hose brought to the thermostat охладительного a path.
  1. Turning a cranked shaft for a bolt of its pulley, result the engine in position ВМТ of the end of a step of compression of the piston of the first cylinder.
  1. Turn out a bolt of a pulley of a cranked shaft and by means of a suitable stripper dismantle last.
  2. Remove the top and bottom sections of a forward cover of drive ГРМ.
  3. Achieve combination of a dot adjusting label of a cogwheel of the left camshaft with a reciprocal label on the top section of a back cover of drive ГРМ.
  1. Make sure of correctness of combination of an adjusting label of a cogwheel of a cranked shaft with риской on the case of the oil pump.
  1. Temporarily establish into place a bolt of a pulley of a cranked shaft, having provided with that possibility проворачивания the last.
  1. Ослабьте a nut натяжителя, develop assemblage of the last and remove газораспределительный a belt.


Condition check


Typical defects of a gear belt of drive ГРМ

 

 PERFORMANCE ORDER

  1. Attentively study a condition of the removed belt, in case of revealing of defects (Typical defects of a gear belt of drive ГРМ see an illustration) make its replacement.
  1. Manually check up freedom of rotation of a roller натяжителя.
  1. Estimate a spring condition натяжителя.
  2. Defective components replace.


Installation


Details of installation of a cover of drive ГРМ

 

 PERFORMANCE ORDER

  1. Make sure that the engine on the former is in position ВМТ of the end of a step of compression of the piston of the first cylinder.
  1. Establish into place натяжитель with a spring.

If turned out a fixing hairpin before вворачиванием in the engine block it is necessary to grease its carving part with fixing hermetic.

  1. With the help пруткового a key develop натяжитель against the stop outside and temporarily tighten a nut of its fixing.

  1. Having tracked correctness of combination of adjusting labels, establish a belt, — white lines on a belt tape should be combined with dot adjusting labels on cogwheels distributive and cranked shaft. Make sure that the belt is planted so that the arrow put on its tape specified aside from the engine (to a forward cover of drive ГРМ).

On models Infiniti QX4 considered in the present Management equipped with the engine of 3.3 l, it is used 133-zubyj газораспределительный a belt. At installation between cogwheels of camshafts there should be 40 teeths of a belt, between wheels of the left distributive and cranked shaft — 43 teeth.

  1. Keeping натяжитель прутковым a key, ослабьте a nut fixing it.

  1. Prutkovym key develop натяжитель on 70—80 degrees clockwise and again temporarily tighten a nut.

  1. Turn a cranked shaft clockwise a minimum on two complete revolutions, in summary having resulted it in position ВМТ of the end of a step of compression of the piston of the first cylinder.

  1. Press a belt tape on a site between a cogwheel of the right camshaft and a roller натяжителя with effort 98 Н (10 кГс).

  1. Fill an edge measuring щупа in the thickness of 0.35 mm and width 1 2.7 mm in a backlash between a tape of a belt and a tension roller.

  1. Slowly turning a cranked shaft clockwise, completely involve an edge щупа under a belt.

The belt at проворачивании a shaft should move approximately on 2.5 teeth.

  1. Keeping натяжитель прутковым a key, tighten a nut fixing it.
  2. Slightly having developed a cranked shaft in any direction, take щуп.
  3. Turn a cranked shaft clockwise a minimum on two complete revolutions, in summary having resulted it in position ВМТ of the end of a step of compression of the piston of the first cylinder.
  4. Establish the top and bottom sections of a forward cover of drive ГРМ (see an illustration of the Detail of installation of a cover of drive ГРМ).


Check of effort of a tension of a belt

 PERFORMANCE ORDER

  1. Result the engine in position ВМТ of the end of a step of compression of the piston of the first cylinder.
  1. Measure size of a deflection of a belt on a site in the middle between cogwheels of camshafts at applying to an effort tape in 98 Н (10 кГс). Demanded value makes 13—15 mm.


On page back
4.5. Removal and installation of the inlet pipeline
On the following page
4.7. Removal, check of a condition and installation of a head of cylinders