BMW 3 Series E30

since 1983-1994 release

Repair and operation of the car

+ 1. Maintenance instruction
+ 2. Maintenance
+ 3. Engine
- 4. Cooling system
   4.2. Specifications
   4.3. Antifreeze
   4.4. Thermostat
   4.5. Radiator
   4.6. Fans and coupling of the drive
   4.7. Pump of cooling liquid
   4.8. Sensor of temperature of cooling liquid
+ 5. Heating and ventilation
+ 6. Fuel system
+ 7. Exhaust system
+ 8. Transmissions
+ 9. Coupling
+ 10. Brake system
+ 11. Running gear
+ 12. Body
+ 13. Electric equipment
+ 14. Useful tips


4.6. Fans and coupling of the drive


Krylchatka of the cooling system fan with a hydraulic clutch

Nut of fastening of a hydraulic clutch of the fan of the cooling system

The nut has the left carving.

The electric fan has 2 speeds of rotation and respectively turns on from 2 thermoswitches which are screwed in a radiator and work at different temperatures. 1 double thermoswitch can be installed on parts of cars.

When working keep in mind that perhaps samproizvolny turning on of the auxiliary fan at operation of the thermoswitch, even at the switched-off ignition.


Electric fan
1. Disconnect the conducting socket from the fan, having raised a latch uvula.
2. Check the electric motor for what connect it directly to the battery. Check freedom of rotation of a krylchatka, having convinced that the engine cooled down.
3. For check of thermoswitches you peremknit their conclusions on the disconnected socket. The fan has to rotate with a high or low speed, depending on that what chain is closed by the checked sensor. On a part of cars it is necessary to include ignition.
4. If power-supply circuits as it should be, but are observed interruptions in operation of the fan, then replace thermoswitches, having merged liquid. If thermoswitches are serviceable, but the fan does not work, then check a safety lock, relay and conducting.
The mechanical fan which is switched on by a hydraulic clutch
5. Disconnect the battery from weight, having taken precautionary measures.
6. On the cold engine check weakness in resistance existence to rotation of a krylchatka.
7. At detection of dribbles replace the coupling.
8. Resistance to rotation of a krylchatka has to increase considerably on the heated-up engine (disconnect the battery from weight). Otherwise replace the coupling.

Removal and installation

Electric fan
1. Disconnect the battery from weight.
2. Remove a forward lattice (see subsection 12.7).
3. Remove a fan arm, radiator, turn off bolts of fastening of the condenser of the conditioner (from the highway not to disconnect) and give the condenser forward.
4. Disconnect the socket and remove the fan.
5. Assembly is carried out upside-down.
The mechanical fan which is switched on by a hydraulic clutch
6. Disconnect the battery from weight and remove a fan casing.
7. Turn off a nut (with the left carving!) fastenings of a hydraulic clutch by Rozhkov a key on 32. For a nut otvorachivaniye sharply strike a key And the Hummer via the extender B.
8. Get the coupling, krylchatka and a casing. If necessary remove a pulley from the roller of the pump of cooling liquid, having turned off 4 bolts.
9. Check a condition of a krylchatka, if necessary replace, having turned off bolts and having removed her from the coupling. The coupling should be stored the party turned to a radiator down.

10. Assembly is carried out upside-down.