Service of Audi A4 from 2001 to 2005 release.
1. Operation and maintenance of the car
2. Engine
2.1. General information
2.2. Predvaritlny checks
2.3. Mekhanichsky part (petrol engines 2,0l)
2.4. Lubrication system
2.5. Cooling system
2.5.1. Removal and installation of the thermostat of the cooling system operated on an algorithm
2.5.2. Check of the thermostat of the cooling system operated on an algorithm
2.5.3. Removal and installation of the water pump
2.5.4. Pressure testing of the cooling system
2.6. System of injection
2.7. System of production of the fulfilled gases
2.8. Mechanical part (petrol engines 3,0; 3,2 l)
2.9. Mechanical part (petrol engines of 4,2 l)
2.10. Mechanical part (diesel engines of 2,0 l)
2.11. Tables
3. Transmission
4. Running gear
5. Steering mechanism
6. Brake system
7. Onboard electric equipment
8. Body
9. Schemes of electric equipment
 




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2-5-sistema-okhlazhdeniya.html

2.5. Cooling system





Fig. 2.206. Plan of connection of hoses of the cooling system: 1 – radiator; 2 – hose of cooling liquid, lower; 3 – the return hose from a turbocharger; 4 – water pump; 5 – turbocharger; 6 – the engine cooling system thermostat with management on the set algorithm; 7 – cooler of engine oil; 8 – block head cylinders/block of cylinders; 9 – water supply branch pipe; 10 – air vent; 11 – heater heat exchanger; 12 – a bolt for removal of air; 13 – broad tank; 14 – branch pipe of cooling liquid; 15 – hose of cooling liquid, top


Fig. 2.207. The case of the distributor of cooling liquid with the cooling system thermostat: 1 – sealing ring; 2 – case of the distributor of cooling liquid; 3 – sealing ring; 4 – tube of cooling liquid, lower; 5 – bolt of 10 N · m; 6 – bolt of 15 N · m; 7 – sealing cuff; 8 – connection of a heating resistor element; 9 – plug; 10 – the engine cooling system thermostat with management on the set algorithm



ATTENTION
When opening the broad tank can come out hot steam or hot cooling liquid. Wrap up a cover rags and carefully open a tank.

NOTE
At the warm engine the cooling system is under pressure. If necessary before repair work it is necessary to dump pressure.

Record all connections of hoses collars which correspond to a serial complete set.
For Ustanovkaa of spring collars it is recommended use pincers for hose collars or pincers for spring collars.
Laying and sealing rings needs to be replaced.
The arrows put on the ends of tubes and hoses of the cooling system have to is against each other.


2.4.3. Check of pressure of oil and sensor of pressure of oil

2.5.1. Removal and installation of the thermostat of the cooling system operated on an algorithm