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

Antifreeze check

For check of frost resistance of a cooling liquid to you it is necessary ареометр. With its help relative density of a liquid is measured. At the expense of different addition of anticorrosive means relative density of separate kinds of antifreeze can be a miscellaneous. For carrying out of absolutely exact measurement to you it is necessary ареометр, adjusted on the filled in antifreeze. In a doubtful case from the received size subtract the admission in 2–3 With.


  1. Suck away a little a cooling liquid from a broad tank, ареометр should float freely.
  2. Ареометр plunges more or less deeply depending on relative density of a liquid.
  3. On a scale define, to what temperature protection against freezing operates.
  4. In some devices there are arrows on whom it is possible to define frost resistance.

Regulation of concentration of antifreeze

More often it is found out that concentration of antifreeze already insufficient. In this case it is necessary to add antifreeze; approximately about 1/2 l on 10 С increases of protection against freezing.


  1. Dismantle the bottom facing of an impellent compartment (the head of the Detail of a body).
  2. Substitute a tray under the car.
  3. At the cold engine disconnect the bottom water hose from a radiator, merge from 1 to 2 l of a cooling liquid.
  4. Again mount a hose and softly tighten the screw.
  5. Pour corresponding quantity of not diluted antifreeze and add together with the merged cooling liquid.