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 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
      Check and adjustment of gaps of valves
      Replacement of maslootrazhatelny caps and klapanny springs with plates
      Removal, check of a condition and installation of a chain and asterisks 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
   + 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


Reduction of the piston of the first cylinder in the provision of the top dead point (VMT)


1. The highest point of a piston stroke in the cylinder is called as the top dead point (VMT). Strictly speaking, in 4-тактных engines in the course of rotation of a cranked shaft this situation is reached by each of pistons twice: once at the end of a step of compression and the second - at the end of a final step. At performance of settings of phases of a gazoraspredeleniye and installation of a corner of an advancing of ignition in overwhelming majority of cases the provision VMT of the end of a step of compression of the piston (usually the first cylinder) is used.
2. Need for piston reduction (it) in situation VMT arises at carrying out many procedures, in particular such, as removal/installation of camshafts and components of a drive of GRM.
3. Make sure that transmission is transferred to neutral situation (the situation "R" on models from AT), then strongly cock the parking brake, or prop up back wheels of the car protivootkatny boots. Also immobilize ignition system, having disconnected sockets of electroconducting of primary contour of coils and having removed assemblies of the last in a set with candles (see. Head of Control and routine maintenance).
4. Reduction of any of pistons in situation VMT is made by a provorachivaniye of a cranked shaft of the engine by one of described below ways. If to take a detached view of the engine in front of (a driving belt), the direction clockwise will be the normal direction of rotation of a cranked shaft. Remember that attempt of a provorachivaniye of a shaft counter-clockwise can lead to violation of adjustments of a gas-distributing belt:

a) The most effective method is the shaft provorachivaniye in the normal direction for a bolt screwed in an end face of its forward pin by means of a face natural by a ratchet drive;
b) To save time use of the remote switch of a starter (follow instructions of manufacturers) will allow. As soon as the piston will appear rather close from VMT of the end of a step of compression, the starter stops and further adjustment is carried out by a method described in point (and);
c) In the presence of the assistant, the preliminary provorachivaniye of the engine can be carried out by short breakthroughs from a driver's place under the direction of the operator. The same principle, as described in point (b). Final adjustment, besides, is made manually, by means of a face key (see point and).

5. Establish компрессометр in a candle opening of the first cylinder (see. The part From the present Chapter - should be used компрессометр with a carving nozzle, and start to turn a cranked shaft for a pulley bolt in the normal direction.

6. In process of piston approach to the provision VMT of the end of a step of compression pressure will start to increase in the cylinder that is easily traced according to indications компрессометра. Continue to turn a shaft until will occur combination of adjusting labels of a pulley of a cranked shaft. If situation VMT is casually passed, turn a shaft on two complete revolutions in the normal direction.