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

Check of system of cooling on tightness

Not tight sites in cooling system to reveal most easier when the engine hot and, accordingly, in cooling system dominates working pressure. 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 tension bolts of collars of hoses are well tightened?
  6. The rusted collars of hoses during movement and at full working pressure in cooling system can unexpectedly not sustain a pressure. Replace!
  7. In a workshop tightness of system of cooling is checked by the special manual air pump with a manometre.
  8. This device is established on an aperture of a broad tank and then pressure in 1 bar is pumped up.
  9. If the scale indication does not decrease within one-two minutes the cooling system is tight.