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
   Check of level of a cooling liquid
   Frost resistance check
   Check of system of cooling on tightness
   Radiator
   Carving cover of a broad tank
   The thermostat
   The list of malfunctions
   The water pump
   Klinovoj belt of the water pump
   The fan of system of cooling
   Malfunctions of the fan of system of cooling
   The list of malfunctions
+ Fuel tank and the fuel pump
+ The air filter and воздухозаборные channels
+ Injection system
+ Coupling
+ 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



Check of system of cooling on tightness

Defective places in system of cooling are the most easier for defining at the hot motor and, accordingly, working pressure in cooling system. But in this case for check of hoses gloves are necessarily necessary, differently it is possible to burn.

  • Whether pass hoses at a radiator and the engine, including hoses to heating system?
  • Cracks in hoses? Kneading, define, how much hoses are firm – in the latter case it is necessary to replace them immediately.
  • At разминании tubes it is possible to define and the damages formed as a result покусов of rodents.
  • How much the ends of hoses come on corresponding branch pipes?
  • Whether coupling bolts of collars are tightened?
  • The rusted collars can unexpectedly burst during a trip and at full working pressure in cooling system. To replace!
  • The workshop supervises tightness of system of cooling by the special air pump with a manual drive and a manometre.
  • This device is established on an aperture of a compensatory tank and pressure 1 bar is pumped up.
  • If within 1—2 minutes pressure does not go down, the cooling system is considered tight.