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 level of cooling liquid

Continuous control

Despite the equipment of control of temperature and level of cooling liquid, you should rely not only on the indicator, but also periodically check level of cooling liquid in a broad tank in an impellent compartment.

  • Precisely to check level of cooling liquid it is possible only at the idle engine.
  • Level of liquid is well visible in a transparent broad tank even with the closed cover. When the engine cold, it should is between markings.
  • At the hot engine level, naturally, above.

Addition of cooling liquid

Appreciable loss of cooling liquid is a sign of any violation in work or defect. Cooling liquid is not spent and cannot evaporate from the closed system of cooling. At an overheat of the engine it can sometimes be wrung out a little cooling liquid to a locking cover. At continuous loss of cooling liquid it is necessary to check cooling system on tightness how it is described further in head.


  1. If at the hot engine the locking cover of a broad tank opens, there is a danger of an oshparivaniye – therefore observe extreme care.
  2. Slowly open a locking cover a hand in a glove or with a rag in the beginning on one turn and let out superfluous pressure from cooling system. After it completely unscrew a cover.
  3. If water is added, antifreeze therefore at once add a little antifreeze is gradually diluted.
  4. Do not pour cooling liquid above a mark "MOVE"; cooling liquid extends when heating, and surplus follows from system.
  5. You can add small amounts of cooling liquid in a dozalivochny tank both at heated-up, and at the cold engine.
  6. At considerable loss of cooling liquid and the hot engine do not pour in a broad tank cold liquid. Because of «cold shock» the head of the block of cylinders can be deformed or burst the engine block.


Here concentration of antifreeze is checked by the analyzer (shooter).

In cooling system not one distilled water provides necessary cooling of the engine, and a mix from water, antifreeze and anticorrosive means. Therefore more precisely to speak about cooling liquid or about cooling means. The ratio of elements in a mix for the European conditions makes 2: 3, in the northern countries 1: 1.

Protection against freezing to
Four-cylinder engine
– 25 °C
– 35 °C
4,0 l
3,5 l
3,0 l
3,5 l
Six-cylinder engine
– 25 °C
– 35 °C
3,5 l
3,0 l
2,5 l
3,0 l

As antifreeze serves этиленгликоль – liquid on the basis of alcohol which does not evaporate and it is not evaporated. Just as protection against freezing, is important also protection against corrosion. Anticorrosive means interferes with education in system of cooling of a scum, a rust and other products of corrosion. Therefore it is impossible to merge in the spring cooling liquid filled in at plant, it for all year remains in cooling system.

In masterful Audis own antifreeze is used by "G 011 A8 C». In a factory complete set application also other products which have a mark «according to TL VW 774 C» is allowed. Probably, at the expense of other concentration other proportions in the mixes different from information, given in the table are formed. Therefore for the sake of precaution pay attention to data on packing. However, antifreeze of different producers can be mixed without fears.