Audi 80/Avant (B4)

since 1991-1995 release

Repair and operation of the car


Audi 80/Avant
+ Technical specification
+ Engines
+ System of production of the fulfilled gases
- Cooling system
   Check of level of cooling liquid
   Frost resistance check
   Check of the cooling system on tightness
   Radiator
   Carving cover of a broad tank
   Thermostat
   List of malfunctions
   Water pump
   Maple belt of the water pump
   Cooling system fan
   Malfunctions of the fan of the cooling system
   List of malfunctions
+ Fuel tank and fuel pump
+ Air filter and airintaking channels
+ System of injection
+ Coupling
+ Transmission and transmission
+ Suspension bracket and steering
+ Brake system
+ Anti-blocking system of brakes
+ Wheels and tires
+ Body electrical system
+ System of ignition
+ Lighting
+ Signalling devices
+ Devices and auxiliary devices
+ Heating and ventilation
+ body Elements
+ Search of malfunctions
+ Specifications




Check of the cooling system on tightness

It is easiest to define defective places in the cooling system at the hot motor and, respectively, working pressure in the cooling system. But in this case for check of hoses gloves are surely necessary, differently it is possible to burn.

  • Whether pass hoses at a radiator and the engine, including hoses to system of heating?
  • Cracks in hoses? Kneading, define as far as hoses are firm – in the latter case they need to be replaced immediately.
  • At a razminaniye of tubes it is possible to define and the damages formed as a result having bitten rodents.
  • As far as the ends of hoses come on the corresponding branch pipes?
  • Whether coupling bolts of collars are tightened?
  • The rusted collars can unexpectedly burst during a trip and at total working pressure in the cooling system. To replace!
  • The workshop controls tightness of the cooling system the special air pump with the manual drive and the manometer.
  • This device is installed on an opening of a compensation tank and pressure of 1 bar is pumped up.
  • If within 1 — 2 min. pressure does not go down, the cooling system is considered tight.