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
   Radiator
   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 level of a cooling liquid

The constant control

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

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

Addition of a cooling liquid

Appreciable loss of a cooling liquid is a sign of any infringement in work or defect. The cooling liquid is not spent and cannot evaporate from the closed system of cooling. Sometimes at an engine overheat the cooling liquid to запорной to a cover can be wrung out a little. At constant loss of a cooling liquid it is necessary to check up cooling system on tightness how it is described further in the head.

PERFORMANCE ORDER

If at the hot engine the cover of a broad tank there is a danger ошпаривания opens запорная – therefore observe extreme care.
Slowly open запорную a cover a hand in a glove or with a rag in the beginning on one turn and let out superfluous pressure from cooling system. Only after that completely unscrew a cover.
If water antifreeze is gradually diluted, therefore is added at once add a few antifreeze.
Do not pour cooling liquid above a mark "MOVE"; the cooling liquid extends at heating, and surplus follows from system.
Small amounts of a cooling liquid you can add in дозаливочный a tank both at heated-up, and at the cold engine.
At considerable loss of a cooling liquid and the hot engine do not pour in a broad tank a cold liquid. Because of a cold shock the head of the block of cylinders can be deformed or burst the engine block.

Antifreeze

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

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

The engine	Protection against freezing to	Water	Antifreeze
The four-cylinder engine	–25 С –35 С	4,0 l 3,5 l	3,0 l 3,5 l
The six-cylinder engine	–25 С –35 С	3,5 l 3,0 l	2,5 l 3,0 l

As antifreeze serves этиленгликоль – a liquid on the basis of spirit which does not evaporate and it is not evaporated. Just as protection against freezing, is important also protection against corrosion. Anticorrosive means interferes with formation 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 factory, it throughout all year remains in cooling system.

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