Nissan Maxima QX

since 1993 of release

Repair and car operation



Nissan Maxima QX
+ Nissan Maxima brand Cars
+ Maintenance instruction
+ Settings and routine maintenance
- Engine
   + SOHC Engines
   + DOHC Engines
   - General major maintenance of the engine
      General information
      Check of pressure of oil
      Check of kompressionny pressure in cylinders
      Diagnostics of a condition of the engine with use of the vacuum gage
      Alternative versions of schemes of regenerative repair of the engine
      Removal of the power unit from the car - preparation and precautionary measures
      Removal and engine installation
      Order of dismantling of the engine by its preparation for major maintenance
      Dismantling of a head of cylinders
      Cleaning and check of a condition of a head of cylinders
      Service of valves
      Assembly of a head of cylinders
      Removal of shatunno-piston assemblies
      Removal of a cranked shaft
      Cleaning of the block of the engine
      Check of a condition of the block
      Honingovaniye of mirrors of cylinders
      Check of a condition of components of shatunno-piston group
      Check of a condition of a cranked shaft
      Check of a condition and selection of loose leaves of radical and shatunny bearings of a cranked shaft
      Check of a condition of camshafts, pushers of valves and bearings
      Engine assembly order
      Installation of piston rings
      Installation of a cranked shaft and check of working gaps of radical bearings
      Installation of a back epiploon of a cranked shaft
      Installation of shatunno-piston assemblies and check of size of working gaps in shatunny bearings of a cranked shaft
      Trial start and engine running in after major maintenance
+ Systems of cooling, heating
+ Power supply system and release
+ engine Electric equipment
+ Control systems of the engine
+ Transmission
+ Coupling and power shafts
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment
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Removal and engine installation

It is worth to remember that gasoline is inflammable liquid in the highest measure! At work with components of a power supply system observe all taken measures of fire safety. Do not smoke, do not come nearer to a venue of works with open fire or unprotected by the lamp shade carrying. Do not make system service in the room equipped with working at natural gas and heating devices equipped with a control torch (such as водогреи and dryers for clothes). Do not forget that gasoline is among the cancerogenic substances promoting development of a cancer. Try not to allow fuel hits on open sites of a body, - use protective rubber gloves, at casual unforeseen contact carefully wash out hands warm water with soap. Immediately collect the spilled fuel and do not put the rags impregnated with a fuels and lubricants near sources of open fire. Remember that the power supply system equipped with injection of fuel of models constantly is under pressure. Before starting a detachment of fuel lines, dump residual pressure in system (for more details see. Head of the Power supply system and release). At service of components of a power supply system put on goggles. Constantly hold near at hand the class B fire extinguisher!

The path of central air of air also constantly is under pressure, and therefore before a rassoyedineniye of refrigerator lines it is necessary to make a system discharge in the conditions of a specialized workshop.


Cars of considered model are equipped with the SRS system which main component are safety cushions. Before starting performance of any works near an arrangement of sensors of the directed overloads of SRS, around a steering column or the dashboard, without fail disconnect system in order to avoid the casual operation of safety cushions fraught with receiving serious traumas.

REMOVAL

 PERFORMANCE ORDER

Before starting procedure performance, attentively familiarize with a material of the present Section. Manufacturers recommend to make removal of the engine from the car assembled with transmission. The partition of the power unit can be made later on a workshop floor.

1. Dump pressure in a power supply system (see. Head of the Power supply system and release).
2. Disconnect a negative wire from the battery.

If the stereosystem established on the car is equipped with a security code before disconnecting the battery make sure that have the correct combination for audiosystem input in action!

3. Cover wings and an airreflector under a car windscreen special protective covers, or simply old blankets. Remove a cowl (see. Head Body).
4. Remove air purifier assembly (see. Head of the Power supply system and release).
5. To Poddomkratta the car also establish it on props. Empty cooling system, merge impellent oil and remove belts of a drive of auxiliary units (see. Head of Control and routine maintenance).

6. Accurately mark and disconnect from the engine all vacuum lines, hoses of systems of cooling and decrease in toxicity of the fulfilled gases, sockets of electroconducting, the tire of grounding and gasoline pipe lines. Marking of electroconducting, lines and hoses is best of all for making by means of an adhesive tape. It will be useful to make also the scheme of laying of communications, or to execute a series of consecutive pictures.

7. Remove fans of system of cooling, disconnect radiatorny hoses and hoses of a heating path (see. Head of System of cooling, heating).
8. Having uncovered a jellied mouth, dump residual pressure in a fuel tank, then disconnect the gasoline pipe lines going from the fuel highway (see. Head of the Power supply system and release). At once закупорьте open ends of tubes and connecting unions.
9. To Otboltita also shift aside the compressor of the conditioner of air, without disconnecting from it refrigerator lines.
10. Disconnect from the engine draft of an accelerator, and at the corresponding complete set of the car, also a cable темпостата (see. Head of the Power supply system and release).
11. To Otboltita the steering pump, shift it aside and tie up, without disconnecting hydraulic lines (see. Head Suspension bracket and steering). Remove the generator (see. Head engine Electric equipment).
12. On SOHC engines remove the coil and the ignition distributor with VV connected to it wires (see. Head engine Electric equipment).

13. Mark and disconnect from both parties of the engine plaits of the main plait of electroconducting.

14. Remove the top section of the inlet pipeline (see. A part DOHC Engines or SOHC Engines of the present Chapter), - do not forget to mark previously all wires subject to a detachment, hoses and tires to grounding.
15. Disconnect a reception pipe of system of production of the fulfilled gases from final collectors of the engine and the catalytic converter and remove it from the car (see. Head of the Power supply system and release).
16. Remove power shafts (see. Head Coupling and power shafts). Disconnect from transmission electroconducting and drafts of a drive of gear shifting (see. Head Transmission).
17. Connect lifting slings to elevating eyes of the power unit, turn on the winch, having completely chosen a weak point of slings.

If the power unit is not equipped with elevating eyes, get slings/chain for both heads of cylinders. Hang out the unit, having completely unloaded support of its suspension bracket.

18. Make sure that nothing remained connected to the power unit and does not stir it to extraction from the car.
19. Prop up transmission by a telezhechny jack, for distribution of loading having enclosed under its head wooden whetstone. Turn out bolts of fastening of support to the engine and a bearing cross-section beam to the chassis (see. Part DOHC Engines or SOHC Engines of the present Chapter).

Take care of reliability of fixing of the unit in the lifted situation.

20. Slowly omit assembly of the power unit on a floor under an impellent compartment of the car.
21. Disconnect an elevating rigging from the unit, перецепите it on a car body, raise the last on sufficient height and take impellent assembly from under the car.

At this stage it will be reasonable to get support of the assistant.

22. Separate the engine from transmission (see. Head Transmission).
23. Establish the separated engine on a floor, or remove a flywheel / a driving disk and fix assembly at the assembly stand.

INSTALLATION

 PERFORMANCE ORDER

1. Check a condition of support of a suspension bracket of the power unit. Defective components replace.
2. On models from RKPP check a condition of components of coupling (it will be correct to replace all assembly) (see. Head Coupling and power shafts). On models from AT estimate a condition of epiploons and plugs of the converter of rotation. Grease with high-temperature greasing directing bearing (models with RKPP) / a converter nouse (models with AT).
3. Accurately connect transmission to the engine (see. Head Transmission).

At all it is not necessary to use fixing bolts for transmission pulling to the engine force!

4. Screw bolts of fastening of the engine to transmission and strongly tighten them.
5. Get assembly of the power unit under the car, having lifted it on a jack on due height, then lower the body of the car hung out on the winch.
6. To Peretsepita a rigging on the unit and carefully hang out it in an impellent compartment.
7. For reliability prop up the engine a jack, then get on a regular place a cross-section beam. Screw the corresponding fixing bolts (a beam and support) and tighten them with demanded effort.

The description of an order of a final tightening of fixture of support of a suspension bracket of the power unit is provided in the last Sections of Parts SOHC Engines and DOHC Engines of the present Chapter.

8. Installation of the remained components is made as it should be the return to an order of their dismantle.
9. Necessarily add in the engine cooling liquid, engine oil, liquid of system of hydrostrengthening of a wheel and so forth (see. Head of Control and routine maintenance).
10. Start the engine and check it on serviceability of functioning and existence of signs of leaks, then muffle and check levels of working liquids.