Audi A3

since 1997 of release

Repair and car operation

Audi A3
+ Maintenance instruction
+ Current leaving and service
+ Engine
- Systems of cooling, heating
   - System of cooling of the engine
      Antifreeze – means of protection from freezing
      Replacement of cooling liquid
      Removal, installation and thermostat check
      Removal and radiator and fan installation
      Removal and installation of the pump of cooling liquid
      Check of system of cooling under pressure
      Check of a thermoswitch of the fan of cooling
   + Systems of ventilation, heating and air conditioning
+ the Power supply system and production of the fulfilled gases
+ engine Electric equipment
+ Manual box of gear shifting
+ Automatic transmission and models with a full drive
+ Coupling and power shafts
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment
+ Elektroskhema


Replacement of cooling liquid


Cooling liquid should be replaced only after repair of system of cooling when liquid merged. Liquid replacement in the course of service is not provided. If at repair the head of cylinders, sealing laying, a radiator, the heat exchanger or the engine were replaced, it is necessary to replace cooling liquid surely. It is necessary for executing, since in process extra earnings on engine elements from easy alloys are besieged protective additives and, thus, the corrosion protective layer is formed. If liquid was used earlier, its structure does not allow to create a necessary protective layer on new elements of the engine.

Cooling liquid is slightly poisonous and it cannot be poured out in the places which have not been intended for its utilization. On places of utilization of liquid should inform local authorities.


When lifting and car installation on supports there is a danger! Therefore previously familiarize with car Poddomkrachivaniye's subsection.

1. Lift and establish the car on supports.
2. Remove the bottom cover of an impellent compartment, thus address to the subsection Removal and installation of the bottom cover of an impellent compartment.


Before an otryvaniye of a broad tank on the hot engine put on it a thick rag to exclude a burn hot liquid and steam. A stopper of a tank tear off only at temperature of cooling liquid below +90°С.

3. Open a stopper of a broad tank.
4. Substitute under a radiator pure capacity.
5. Open a drain stopper (the shooter on an illustration) turn on the left. It is recommended to put on a hose a drain branch pipe. Collect merging liquid.
6. Diesel and some petrol engines: In addition remove a hose of cooling liquid from below at an oil radiator / cooling liquid (an oil radiator). For this purpose open a collar by means of the HAZET 798-5 tool and shift it completely back. The oil radiator is at a flange of the oil filter. Completely merge oil.
7. Make a mix of 50 % of water and 50 % of means for protection against freezing and corrosion, thus address to the subsection Antifreeze - means of protection from freezing.
8. Put on an oil radiator a hose of cooling liquid and fix it a collar.
9. Tighten a drain stopper on a radiator.
10. Establish the bottom cover of an impellent compartment, thus address to the subsection Removal and installation of the bottom cover of an impellent compartment.
11. Lower the car on wheels.
12. Slowly fill system to a mark of MAX in a broad tank.
13. Start the engine and let's to it work on the raised turns in 1500 rpm within about 2 minutes. Thus fill a broad tank with liquid to a perelivny opening.
14. Close a broad tank.
15. Start the engine so that the electrofan turned on.
16. Stop the engine and let's to it be cooled.
17. Check level of cooling liquid and if necessary add. At the warm engine level of liquid should reach MAX mark, at the cold should lie between MAX and MIN marks.