Audi A4

Since 1994 of release

Repair and car operation

Audi А4
+ Running gear
+ Regular servicing
+ Engines
+ Turbo-supercharging
+ Exhaust system
- Cooling system
   So there is a cooling
   Check of level of a cooling liquid
   Antifreeze check
   Check of system of cooling on tightness
   Zapornaja cover of system of cooling
   The thermostat
   The help at malfunctions
   The water pump
   Klinovoj belt of the water pump
   Various models of fans
   The vjazkostnyj fan
   The fan of a radiator with the electric drive
   Infringements in work of the fan of a radiator
   The help at malfunctions
+ Fuel tank and the fuel pump
+ The air filter and channels всасывания
+ Injection system
+ Coupling
+ Transmission and the main transfer
+ Suspension bracket of wheels and steering
+ Brakes
+ Wheels and tyres
+ The electrotechnical equipment
+ Ignition system
+ Illumination
+ The alarm equipment
+ Tools and devices
+ Heating and ventilation
+ Body details
+ Salon
Search of malfunctions
Technical characteristics

The vjazkostnyj fan

Here you see вязкостный the fan (the radiator fan) six-cylinder engine. Its knots:

1 – the fan blade;
2 – an axis вязкостного couplings – at the six-cylinder engine with the big fixing bolt with шестигранной a head;

3 – вязкостное coupling.

For economy of capacity this fan is supplied so-called вязкостным by coupling. It includes the fan at an ambient temperature 82 С. It is carried out by means of a bimetallic tape which, being temperaturno-dependent, through the valve lets in viscous silicone oil working space вязкостного couplings. Oil creates power short circuit between a belt pulley and the fan – the fan submits cool air. At temperature more low 60 С silicone oil comes back from working space in a collector – the fan rotates with smaller speed, without spending capacity.

Dismantle вязкостного the fan

Dismantle вязкостного the fan of the six-cylinder engine: to weaken a fixing bolt of the fan, it is necessary to block a belt pulley: into an aperture (2) to insert a screw-driver and to rest against an arm (1).

The same process which is described in the dismantled engine at the left, here is shown in the car. The screw-driver is inserted into an aperture (2) and rests against an arm (1). It is possible to unscrew a bolt (3).

Dismantle вязкостного the fan at the four-cylinder engine: the belt pulley (1) is blocked by bolt М5 Х 60 (2), the fixing bolt can be unscrewed a key with internal шестигранником 8 mm (3).


  1. The four-cylinder engine: unscrew a key behind in the fan bearing a fixing bolt with internal шестигранником
    In 8 mm. A belt pulley block, having inserted bolt М5 Х 60.
  2. Remove вязкостный the fan.
  3. Unscrew from the fan its coupling.
  4. At installation tighten a bolt on 70 Nanometers.
  5. The moment of an inhaling of the fan at coupling: 10 Nanometers.
  6. The six-cylinder engine: ослабьте a fixing bolt of the fan (it simultaneously is a fan axis) рожковым key SW 32.

     Attention: the left carving! Block thus a belt pulley a screw-driver. The screw-driver rests against the arm provided for this purpose.

  7. Remove вязкостный the fan.
  8. Unscrew on the fan вязкостное coupling.
  9. At installation tighten a bolt on 70 Nanometers.
  10. The moment of an inhaling of the fan on coupling: 10 Nanometers.