BMW 5 series E39

Since 1996-2001 of release

Repair and car operation

+ Introduction
+ The maintenance instruction
+ Current leaving and service
- The engine
   - Procedures of repair of the engine
      Compression check
      Removal and installation of the bottom guard of an impellent compartment
      Removal and engine installation
      Removal and installation of the inlet pipeline
      Removal and installation of a head of cylinders
      Removal and camshaft installation
      Removal and installation of valves
      Check of directing valves
      Processing of saddles of valves in a head of cylinders / grinding in of valves
      Removal, installation and tension клинового a belt
   + System of greasing of the engine
+ Systems of cooling, heating
+ The 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
+ Electric equipment schemes
+ System of onboard diagnostics

Processing of saddles of valves in a head of cylinders / grinding in of valves

Processing of saddles of valves is required in the event that they have wear tracks and обгорания or if the directing were processed. Thus it is necessary to observe values of an adjustment corner and width of a facet. To replace saddles, using usual means it is impossible, since. They were established with cooling to - 150С. For saddle processing the special machine tool is required. This work should be carried out in conditions HUNDRED. Values of corners of processing are resulted in Specifications.

External diameter of a saddle of the valve (4) corresponds to external diameter of the valve.

Grinding in of saddles

At correctly spent processing of saddles of valves and new valves grinding in of saddles in a head of cylinders is not required.

Valves should get used only fine-grained paste. The sucker which is put on a plate of the valve is applied to grinding in. During grinding in it is necessary to raise often the valve simultaneously rotating it further. It excludes formation of furrows on a ground in surface.

After grinding in paste is necessary for removing carefully from the valve.

Quality of grinding in can be checked up on appearance and fuel. For this purpose the valve insert freely into the turned head of cylinders and fill in fuel from above in the combustion chamber. After long time (1 hour) fuel should not follow from the directing. Otherwise grinding in is necessary for repeating.