BMW 3 Series E46
since 1998 release
Repair and operation of the car
BMW 3 Series E46
+ BMW 3 cars (E46)
+ Current leaving and service
- Procedures of repair of the engine
Removal and installation of the lower cover of a motive compartment
Removal and installation of a box of an air inlet
Check of a compression
Removal and installation of the inlet pipeline
Removal and installation of a head cylinders / replacement of sealing laying
Removal and installation of camshafts
Removal and installation of the vacuum pump
Removal, installation and tension of a maple belt
+ Engine lubrication system
+ Cooling systems, heating
+ Power supply systems, injection and release
+ Engine electric equipment
+ RKPP and transmission line
+ Automatic transmission
+ Coupling and power shafts
+ Brake system
+ Suspension bracket and steering
+ Onboard electric equipment
+ Schemes of electric equipment
Check of a compressionCheck of a compression allows to draw a conclusion on a condition of the engine. During check it is possible to establish whether valves and pistons (piston rings) are serviceable or they are worn-out. Besides, results of check show whether it is necessary to replace the engine or it needs to be repaired. For check it is necessary компрессометр.
The difference between values of pressure of a compression of separate cylinders should not exceed 1.0 bars at the petrol engine, and 3.0 bars at the diesel.
If one or several cylinders in comparison with others have pressure differing on higher value it indicates damage of valves, wear of piston rings or damage of laying of a head of cylinders. In this case the engine needs to be repaired or replaced.
The size of pressure is of secondary importance as it depends among other on the used measuring device. Petrol engines it should have no less than 10 bars.