Saab 9-5

since 1997 of release

Repair and car operation



Saab 9-5
+ Saab 9-5 Cars
+ Governing bodies and operation receptions
+ Settings and routine maintenance of the car
- Engine
   General information and preparatory operations
   Check of kompressionny pressure
   Engine check by means of the vacuum gage
   - Repair of 4-cylinder petrol engines
      Reduction of the piston of the first cylinder in the provision of the top dead point (VMT)
      Removal and installation of a head of cylinders and natyazhitel of a driving chain
      Removal and installation of camshafts and valves, assessment of klapanny gaps
      Check and replacement of a driving chain
      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 installation of the pallet of a case
      Removal and installation of an arm of the filter, thermostat and reduktsionny 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 a drive of GRM
      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 production of the fulfilled gases
+ Systems of electric equipment of the engine
+ Manual box of gear shifting
+ 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 the provision of the top dead point (VMT)

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 release step. At performance of procedures of control and engine adjustments in overwhelming majority of cases position of the piston of the first cylinder in VMT of the end of a step of compression is used.

Need for piston reduction in situation VMT arises at carrying out many procedures, in particular such, as service of the klapanny mechanism, removal and installation of a camshaft, components of a drive of GRM, etc.

Make sure that transmission is transferred to neutral situation, then cock the parking brake, or prop up back wheels of the car protivootkatny boots. Separate sockets of electroconducting of coils of ignition and turn out spark plugs (see. Section Check and replacement of spark plugs and ignition module).

Reduction of any of pistons in situation VMT is made by a provorachivaniye of a cranked shaft of the engine in the normal direction of rotation by means of a face natural by 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, the preliminary provorachivaniye of the engine can be carried out by a starter (short breakthroughs) from a driver's place under the direction of the operator.

Installation of the piston of the first cylinder in situation VMT


 PERFORMANCE ORDER

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

Kompressometr should be completed with 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 coincided with an adjusting label on a cover of a belt of a drive of GRM. Thus the piston of the first cylinder will be given in VMT.
  2. To make sure of that VMT of the end of a step of compression is reached it is possible, watching indications компрессометра – at approach to VMT of the end of a step of compression pressure will begin considerably grow in the cylinder. If the cover of a head of cylinders is removed, to make sure of achievement of VMT of the end of a step of compression it is possible, watching camshafts – labels on them should coincide with labels on covers of bearings. Thus all valves of the first cylinder are closed.
  3. If VMT of the end of a step of release is reached, for piston reduction in VMT of the end of a step of compression turn a cranked shaft in the normal direction on a complete revolution.