Audi A3

Since 1997 of release

Repair and car operation

Audi A3
+ The maintenance instruction
+ Current leaving and service
+ The engine
- Systems of cooling, heating
   - System of cooling of the engine
      Antifreeze – a protection frame from freezing
      Replacement of a cooling liquid
      Removal, installation and thermostat check
      Removal and radiator and fan installation
      Removal and installation of the pump of a 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 release of the fulfilled gases
+ Engine electric equipment
+ Manual box of a gear change
+ Automatic transmission and models with a full drive
+ Coupling and power shafts
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment
+ Electroschemes

Replacement of a cooling liquid


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

The cooling liquid is slightly poisonous also it it is impossible to pour out in the places which have been not intended for its recycling. On places of recycling of a liquid should inform local authorities.


At lifting and car installation on supports there is a danger! Therefore preliminary familiarise with subsection of Poddomkrachivanie of the car.

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


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

3. Open a stopper of a broad tank.
4. Substitute under a radiator pure capacity.
5. Open a drain stopper (the marksman 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 a cooling liquid from below at an oil radiator / a cooling liquid (an oil radiator). For this purpose open a collar by means of tool HAZET 798-5 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 subsection Antifreeze - a protection frame from freezing.
8. Put on an oil radiator a hose of a cooling liquid and fix its collar.
9. Tighten a drain stopper on a radiator.
10. Establish the bottom cover of an impellent compartment, thus address to subsection Removal and installation of the bottom cover of an impellent compartment.
11. Lower the car on wheels.
12. Slowly fill system to mark MAX in a broad tank.
13. Start the engine and allow to it to work on the raised turns in 1500 rpm within nearby 2 minutes Thus fill a broad tank with a liquid to переливного apertures.
14. Close a broad tank.
15. Start the engine so that the electrofan has joined.
16. Stop the engine and allow to it to be cooled.
17. Check up level of a cooling liquid and if necessary add. At the warm engine liquid level should reach mark MAX, at the cold should lie between marks MAX and MIN.

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