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

Antifreeze check

For check of frost resistance of cooling liquid the areometer is necessary to you. With its help specific weight of liquid is measured. At the expense of different addition of anticorrosive means specific weight of separate types of antifreeze can be a miscellaneous. For carrying out absolutely exact measurement the areometer which has been adjusted on filled-in antifreeze is necessary to you. In a doubtful case from the received size subtract the admission in 2–3 ° Page.


  1. Suck away a little cooling liquid from a broad tank, the areometer should float freely.
  2. The areometer plunges more or less deeply depending on specific weight of liquid.
  3. By a scale determine, to what temperature protection against freezing operates.
  4. In some devices there are shooters by whom it is possible to determine frost resistance.

Regulation of concentration of antifreeze

It becomes clear more often that concentration of antifreeze already insufficient. In this case it is necessary to add antifreeze; about about 1/2 l on 10 °C of increase of protection against freezing.


  1. Dismantle the bottom facing of an impellent compartment (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 cooling liquid.
  4. Again mount a hose and softly tighten the screw.
  5. Pour the corresponding amount of undiluted antifreeze and add together with the merged cooling liquid.