Saab 9-5

Since 1997 of release

Repair and car operation



Saab 9-5
+ Cars Saab 9-5
+ Controls and operation receptions
+ Options and car routine maintenance
- The engine
   The general information and preparatory operations
   Check компрессионного pressure
   Check of the engine by means of the vacuum gauge
   - Repair of 4-cylinder petrol engines
      Reduction of the piston of the first cylinder in position of the top dead point (ВМТ)
      Removal and installation of a head of cylinders and натяжителя приводной chains
      Removal and installation of camshafts and valves, estimation клапанных backlashes
      Check and replacement приводной chains
      Replacement of a belt of a drive of auxiliary units
      Replacement of epiploons and pulley of a cranked shaft
      Replacement of the oil pump
      Removal and pallet installation картера
      Removal and installation of an arm of the filter, the thermostat and редукционного the valve of system of greasing of the engine
      Check of pressure of impellent oil
      Removal and installation of the power unit
      Removal and installation of a cover of drive ГРМ
      Check and replacement of a chain of a drive of balancing shaft and their asterisks
   + Repair of 6-cylinder petrol engines
   + Repair of 6-cylinder diesel engines
+ Systems of cooling of the engine, heating, ventilation and air conditioning
+ The power supply system and release of the fulfilled gases
+ Systems of an electric equipment of the engine
+ Manual box of a gear change
+ Automatic transmission
+ Coupling and power shafts
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment





Repair of 4-cylinder petrol engines

Reduction of the piston of the first cylinder in position of the top dead point (ВМТ)

As the top dead point (ВМТ) is called the highest point of a piston stroke in the cylinder. Strictly speaking, in 4-taktnyh engines in the course of rotation of a cranked shaft the given position is reached by each of pistons twice: once in the end of a step of compression and the second – in the end of a release step. At performance of procedures of adjustment and adjustment of the engine in overwhelming majority of cases position of the piston of the first cylinder in ВМТ the end of a step of compression is used.

Necessity for piston reduction for position ВМТ arises at carrying out of many procedures, in particular such, as service клапанного the mechanism, removal and installation of a camshaft, components of drive ГРМ, etc.

Make sure that transmission is translated in neutral position, then cock a lay brake, or prop up back wheels of the car противооткатными boots. Separate sockets of electroconducting of coils of ignition and turn out spark plugs (the Section Check and replacement of spark plugs and the ignition module see).

Reduction of any of pistons in position ВМТ is made by проворачивания a cranked shaft of the engine in a normal direction of rotation by means of a face key with a ratchet drive (clockwise) for a bolt screwed in an end face of a forward pin of a cranked shaft. In the presence of the assistant, preliminary проворачивание the engine a starter (short jerky) can be carried out from a driver's place under the direction of the operator.

Installation of the piston of the first cylinder in position ВМТ


 PERFORMANCE ORDER

  1. If the cover of a head of cylinders is not removed, turn out spark plugs and establish компрессометр in a candle aperture of the first cylinder.

Компрессометр should be completed by a carving nozzle with a connecting hose in length not less than 15 see

  1. Turn a cranked shaft so that the notch on its pulley has coincided with an adjusting label on a cover of a belt of drive ГРМ. Thus the piston of the first cylinder will be resulted in ВМТ.
  2. To make sure of that is reached ВМТ the end of a step of compression it is possible, observing of indications компрессометра – at approach to ВМТ the end of a step of compression pressure will start to grow in the cylinder considerably. If the cover of a head of cylinders is removed, to make sure of achievement ВМТ of the end of a step of compression it is possible, observing of camshafts – labels on them should coincide with labels on covers of bearings. Thus all valves of the first cylinder are closed.
  3. If it is reached ВМТ the end of a step of release for piston reduction in ВМТ the end of a step of compression turn a cranked shaft in a normal direction on a complete revolution.