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
      General information
      Preparatory actions and the list of repair procedures which can be executed without engine extraction from the car
      Reduction of the piston of the first cylinder in the provision of the top dead point (VMT)
      Removal and installation of covers of heads of cylinders
      Removal, check of a condition and installation of assembly of yokes
      Replacement of maslootrazhatelny caps and klapanny springs with plates
      Removal and installation of a gas-distributing belt and cogwheels of a drive of GRM
      Removal and installation of camshafts and pushers of valves
      Removal and installation of the inlet pipeline
      Removal and installation of final collectors
      Removal and installation of heads of cylinders
      Removal and installation of a pulley of a cranked shaft
      Replacement of a forward epiploon of a cranked shaft
      Removal and installation of the pallet of a case of the engine
      Removal, check of a condition and installation of the oil pump
      Removal and flywheel installation / driving disk
      Replacement of a back epiploon of a cranked shaft
      Check of a condition and replacement of support of a suspension bracket of the power unit
   + DOHC Engines
   + General major maintenance of the engine
+ 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 installation of camshafts and pushers of valves

Pushers of valves

 PERFORMANCE ORDER

1. Uncover heads of cylinders (see. The section Removal and installation of covers of heads of cylinders) also take assemblies of yokes with axes (see. Section Removal, check of a condition and installation of assembly of yokes).

2. For fixing of pushers in directing, put on them rubber bandages.

Casually dropped out pushers immediately return to the corresponding nests of assembly directing.

3. Remove assembly directing pushers.

4. Serially take pushers from the nests in directing and combine them in the organized manner - at assembly each pusher should be established strictly on the former place.

In order to avoid formation of air jams, try not to put pushers sideways and not to overturn them upside down. Alternatively pushers should be put in the capacities filled with pure impellent oil.

5. Having filled a pusher in the landing nest, drown a plunzher acting from his top end face. If the course of a plunzher exceeds 1 mm, means, at a pusher there is an air.
6. In the presence of suspicions on hit in a pusher of air establish to the place of assembly of yokes with axes and a cover of a head of cylinders.
7. For air removal from pushers start the engine with frequency of 1000 rpm and let's to it work without loading within about 10 minutes.
8. Again uncover heads of cylinders and take assemblies of yokes with axes and repeat the procedure described in paragraph 5. If to remove air from a pusher it was not possible, replace it new.
9. Estimate degree of wear of the pushers removed from the engine (see. Part General major maintenance of the engine of the present Chapter).
10. Installation is made upside-down, forget to grease before landing pushers impellent oil.


Camshafts

REMOVAL

 PERFORMANCE ORDER

1. Remove from the engine of a head of cylinders (see. Section Removal and installation of heads of cylinders).

2. Turn out fixing bolts and, having accurately hooked, remove from the end face of a head turned towards transmission a plate of a cover of a camshaft.

3. Holding a shaft for лыски from a provorachivaniye, release a bolt of its fastening. Turn out a bolt and remove a persistent plate.

4. Having accurately hooked a small screw-driver, take a camshaft epiploon from the landing nest, - try not to damage a pin.

Otzhimaniye of a shaft through an opening in a persistent plate will facilitate procedure of extraction of an epiploon.

5. Carefully holding a shaft since both ends and making rotary motions, take it from a head of cylinders.

Try not to allow damages of bearings and shaft cams. The description of procedures of check of a condition of a shaft and its bearings is provided in the Part DOHC Engines of the present Chapter.

INSTALLATION

 PERFORMANCE ORDER

1. Grease bearing necks of a shaft with molibdensoderzhashchy greasing, then accurately fill assembly on the regular place in a head of cylinders, - try not to damage bearing surfaces.
2. Establish into place a persistent plate of a camshaft, screw a back bolt and tighten it with demanded effort.
3. Having established a shaft in a head of cylinders, measure its size axial люфта (see. Part General major maintenance of the engine of the present Chapter).

4. If axial люфт a shaft leaves out of admissible limits, it is necessary to pick up a new persistent plate. Measure thickness of an old plate and pick up new for reasons of reduction axial люфта in bulk in norm.

5. Establish a new epiploon of a camshaft. Further assembly of a head of cylinders is made as it should be the return to an order of dismantle of components. The description of procedure of installation of a head is provided in the Section Removal and installation of heads of cylinders.


Replacement of epiploons of camshafts

 PERFORMANCE ORDER

1. Replacement of epiploons of camshafts can be made and without dismantle of the last. Will enough remove only gas-distributing belt and the corresponding cogwheels of a drive of GRM. Extraction of old epiploons is made by a poddevaniye by their screw-driver, - try not to damage pins of shaft.

2. Landing of epiploons is made by means of a special opravka as which the face head of the corresponding size, or a piece of a pipe of suitable diameter can be used. The epiploon should be planted in the nest strictly perpendicularly. Continue an epiploon press fitting until it will not rest against a nest bottom in a body of a head of cylinders.