BMW 5 Series E39

since 1996-2001 release

Repair and operation of the car

+ Introduction
+ Maintenance instruction
+ Current leaving and service
- Engine
   + Procedures of repair of the engine
   - Engine lubrication system
      Scheme of a contour of circulation of oil
      Check of pressure of oil
      Removal and installation of the pallet of a case
      Removal, installation and check of the oil pump
+ Cooling systems, heating
+ Power supply system and release
+ 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

Scheme of a contour of circulation of oil

BMW engines have lubricant under pressure. The oil pump sucks in oil through a grid from the pallet of a case and gives it under pressure to system through an oil filter. Through the central axis of the filtering boss the purified oil comes to the trunk oil main. If the filter is littered, oil through perepuskny the valve comes directly to system without cleaning.

After an oil filter the reducing valve supporting pressure about 4 bars is installed. At increase in pressure of oil the valve opens and merges oil in the case pallet.

From the trunk main there are branches for lubricant of bearings of a bent shaft. Via inclined channels oil moves to conrod bearings and from there to the bottoms of pistons and to cylinders.

At the same time motive oil through vertical tubes moves in a head of cylinders, greasing bearings of camshafts, compensators of valvate gaps and guides of valves there. Throttle channels provide giving of necessary amount of oil for lubricant of the listed above elements in a head of cylinders.

Besides, oil treats to a distribution mechanism drive chain a natyazhitel and at the petrol engine to a driving chain of the oil pump.