BMW 5 Series E39

since 1996-2001 release

Repair and operation of the car


BMW E39
+ Introduction
+ Maintenance instruction
+ Current leaving and service
+ Engine
+ Cooling systems, heating
- Power supply system and release
   + Power supply system
   + System of injection of the petrol engine
   - Power supply system of the diesel engine
      Turbocompressor
      System of recirculation of the fulfilled gases (EGR system)
      Device of heating of the fuel filter
      Removal of air from fuel system
      Check, removal and installation of the fuel locking valve
      Removal and installation of nozzles
      Check and adjustment of the moment of the beginning of injection
      Removal and installation of the inlet pipeline
   + System of production of the fulfilled gases
+ Engine electric equipment
+ Manual transmission
+ Automatic transmission
+ Coupling and power shafts
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment
+ Schemes of electric equipment
+ System of onboard diagnostics



Turbocompressor

The engine is equipped with a turbocompressor. The turbocompressor has two turbine wheels which are in separate cases. Rotation of a turbocompressor is carried out from energy of the fulfilled gases. Angular speed of rotation reaches 120 000 rpm.

Thanks to the fact that in cylinders the bigger amount of air moves engine capacity increases to 100%. Pressure of air of pressurization makes from 0.4 to 0.8 bars (air pressure in tires makes about 1.8 bars). If pressure of air increases more established size, the safety valve opens.

Along with increase in engine capacity also its torque increases that favorably affects its elasticity. Unlike the petrol engine diesel thanks to high extent of compression allows to use effectively fuel in the field of low numbers of turns.

The turbocompressor represents a high-precision design. Therefore its repair has to be carried out only by experts. As imparted, at damage of a turbocompressor it is completely replaced.

Lubricant of a turbocompressor is carried out from the engine lubrication system. For providing reliable lubricant of a turbocompressor it is necessary to meet the following conditions:
   a) It is necessary to apply only the recommended motive oil.
   b) Old motive oil can lead to coking up of the supercharger. Therefore motive oil and an oil filter have to be replaced in due time.
   c) Hit even of small pollution can lead to damage of the supercharger. Therefore it is not necessary to operate the engine without air filter.