BMW 3 of the E46 series

since 1998 release

Repair and operation of the car

BMW 3 of the E46 series
+ BMW 3 Cars (E46)
+ Current leaving and service
+ Engine
- Cooling systems, heating
   - Engine cooling system
      Replacement of cooling liquid
      Check of a thermoswitch
      Check of the cooling system under pressure
      Connection and separation of the quick disconnect coupling
      Removal and installation of the thermostat
      Removal and installation of a fan / casing of the fan
      Removal and installation of the fan with the viscous coupling
      Removal and installation of a radiator
      Removal and installation of the pump of cooling liquid
   + Heater and conditioner of air of salon
+ Power supply systems, injection and release
+ Electric equipment of the engine
+ RKPP and transmission line
+ Automatic transmission
+ Coupling and power shafts
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment
+ Schemes of electric equipment

Removal and installation of the fan with the viscous coupling

320i, 323i, 328i with the conditioner

The fan with the viscous coupling is fixed on a shaft of the pump of cooling liquid. Together with the fan having the electric drive its task includes giving of enough air through a radiator.

The coupling of the fan needs to be replaced if the nave has teases and wear. Thus the fan at the motionless engine does not rotate or rotates hardly. The coupling needs to be replaced also if the axial or radial gap is exceeded by 0.6 mm. For check it is necessary to move the fan in the longitudinal and cross directions. Thus oil should not follow from a nave.


1 Remove directing the soaked-up air for what a small screw-driver take out clips.

2 Unscrew the fan from a nave of the pump of cooling liquid a key on 32 mm.

The nut of fastening has the left carving and for an otvorachivaniye has to rotate to the right (an arrow on an illustration).

At a nut otvorachivaniye the nave needs to be held from rotation by a maple belt. If the nut sits especially tight, it is possible to knock on a key with a hammer. HUNDRED BMWs are used for this purpose by the special tool by means of which the pulley keeps for heads of bolts. After a nut otvorachivaniye further it can be twisted by rotation of a krylchatka. Watch that the krylchatka did not fall. The fan is removed up.

3 Disconnect a krylchatka from the viscous coupling for what turn out screws (arrows on an illustration) and take out the coupling.


4 Insert the viscous coupling into a krylchatka and fix it screws the moment of 10 N • m.

For an exception of damage of a carving and the coupling do not tighten screws too strongly.

5 Fix the fan with the coupling on a nave of the pump of cooling liquid the moment of 40 N • m. Thus hold a nave from a provorachivaniye for maple a belt or heads of bolts.

Do not warp a nut at installation.

6 Insert directing the soaked-up air and fix clips.