Audi A4

since 1994 of release

Repair and car operation

A4 Audi
+ Running gear
+ Regular servicing
+ Engines
+ Turbo-supercharging
+ exhaust System
- Cooling system
   So there is a cooling
   Check of level of cooling liquid
   Antifreeze check
   Check of system of cooling on tightness
   Locking cover of system of cooling
   The help at malfunctions
   Water pump
   Maple belt of the water pump
   Various models of fans
   Vyazkostny fan
   The radiator fan with the electric drive
   Violations in operation of the fan of a radiator
   The help at malfunctions
+ Fuel tank and fuel pump
+ Air filter and absorption channels
+ injection System
+ Coupling
+ Transmission and main transfer
+ Suspension bracket of wheels and steering
+ Brakes
+ Wheels and tires
+ Electrotechnical equipment
+ ignition System
+ Lighting
+ Alarm equipment
+ Tools and devices
+ Heating and ventilation
+ body Details
+ Salon
Search of malfunctions
Technical characteristics

Check of system of cooling on tightness

Not tight sites in system of cooling it is most easier to reveal, when the engine hot and, respectively, in system of cooling working pressure dominates. Therefore for check of water hoses put on working gloves to avoid burns.


  1. Hoses at a radiator and the engine, and also in heating system are tight?
  2. Cracks in hoses? Knead them to establish, whether there were hoses rigid and fragile – in this case replace.
  3. Kneading hoses, it is possible to establish, whether there were not tight sites caused by stings of rodents?
  4. The ends of hoses are leaky attached to branch pipes?
  5. Whether
  6. tension bolts of collars of hoses are well tightened?
  7. The rusted collars of hoses during movement and at total working pressure in system of cooling can unexpectedly not sustain a pressure. Replace!
  8. In a workshop tightness of system of cooling is checked by the special manual air pump with a manometer.
  9. This device is established on an opening of a broad tank and then pressure in 1 bar is pumped up.
  10. If the indication of a scale does not decrease within one-two minutes, the system of cooling is tight.