Audi 80/Avant (B4)

Since 1991-1995 of release

Repair and car operation

Audi 80/Avant
+ The description
+ Engines
+ System of release of the fulfilled gases
+ Cooling system
+ Fuel tank and the fuel pump
+ The air filter and воздухозаборные channels
+ Injection system
- Coupling
   Drive of management of coupling
   Coupling service life
   Coupling check
   Check of a hydraulic drive of coupling
   Coupling removal
   The list of malfunctions
+ Transmission and transmission
+ Suspension bracket and steering
+ Brake system
+ Antiblocking system of brakes
+ Wheels and tyres
+ Kuzovnaja electrosystem
+ Ignition system
+ Illumination
+ Signalling devices
+ Devices and auxiliary devices
+ Heating and ventilation
+ Body elements
+ Search of malfunctions
+ Specifications


Coupling check

In the established condition it is impossible to distinguish deterioration of a conducted disk. Deterioration first sign is проскальзывание couplings.

Sliding coupling attracts attention at first on the highest transfer at movement with cargo. The engine grows, and speed remains former. About deterioration you can receive certain concept, having done the following experience which should not be repeated too often.

Slips coupling or not?


    To put the car on a manual brake, to start the engine. To include the third transfer, slowly to squeeze out coupling and to give gas. At a good manual brake the engine should decay. If the engine continues to work, it is necessary to repair coupling.

Whether "conducts" coupling?

If the transmission is difficultly switched even at the heated-up engine or switching process is accompanied by scratching or creaking sounds most likely, coupling completely is not switched off, i.e. It "conducts". The similar effect is caused by transmission damages seldom enough. To be completely assured, we will make experiment with the first or a reverse gear:


    To leave the engine to work in an idling mode. Completely to squeeze out a coupling pedal, to wait about three seconds, and then to try to include the first or back transfers. If transfer joins hardly or the transmission creak is audible, it means that coupling "conducts". The conducted disk rotates thus not absolutely freely. To check hydraulics of coupling and to pump over. Once again to make the above described experiment. Other reasons of not divided coupling are resulted in the list of malfunctions in the end of the head.