Audi A4

Since 1994 of release

Repair and car operation



Audi А4
+ Running gear
- Regular servicing
   Installation in a starting position of the indicator of periodicity of maintenance service
   Crossing of dates of maintenance service
   The plan of maintenance service for the motorist
   Diagnostics in workshop Audi
   Diagnostics of an executive element
   Interrogation of a database of malfunctions
   Diagnostics as the help to the fan
   Car identification
   Safety precautions on a workplace
   Jacks
   Greasing of all details
   Check of level of oil
   The oil expense
   Choice of oil with the correct specification
   Viscosity of oil
   Correctly picked up engine oil for Audi
   Replacement of engine oil and the oil filter
   Check of level of a liquid in system сервоуправления
   Check of level of oil in a mechanical transmission
   Check of level of oil in a drive of the back bridge
   The control of level ATF in an automatic transmission
   Check of level of oil in the main transfer of an automatic transmission
   Replacement ATF
   Greasing of draughts, hinges and locks
+ Engines
+ Turbo-supercharging
+ Exhaust system
+ Cooling system
+ 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



Viscosity of oil

Fluidity of oil – i.e. Degree of its density or разжиженности – should approach for application in the engine. Conformity to two criteria is necessary:

  • It should not be too viscous as the starter should turn the cold motor so that after cold start oil has reached at once all points of greasing.
  • It should not be too liquid because at heats and turns in an oil film there can be ruptures.

 

On the schedule recommendations of firms Audi/Volkswagen concerning viscosity of oil are shown:

And – all-weather oils according to standard VW 500 00;
In – all-weather oils according to standard VW 500 01.

The named parametres are understood as for a long time operating temperatures. Short-term fluctuations do not play a role.

Classes of oils it agree SAE

The society of autotractor engineers (Society of Automotive Engineers, the USA) has divided all oils on degree of their viscosity into classes. Classification of engine oils begins with liquid winter oil (winter – Winter) SAE 5 W, 10 W, 15 W, then intermediate step SAE 20 W/20 and comes to an end with viscous summer oils (summer – Sommer) SAE 30, 40 and 50.

Seasonal oil

Seasonal oil was the cheapest engine oil earlier. For optimum greasing of the engine in it it is necessary to fill in dense or liquid seasonal oil according to a season. Now seasonal oils are not on sale almost (Germany means), but they still are often applied in motor-vehicle pools. Application of seasonal oil in Audi A4 is not provided.

All-weather oil

More трудозатратное in manufacturing and consequently more expensive, than seasonal oil, all-weather oil has found today the widest application. For improvement of vjazkostno-temperature properties (VI) in it long chains of molecules which at heating inflate contain as an additive and are again compressed at cooling. In this connection oil can plastically adapt to temperature and under the characteristics to cover some classes of viscosity. Oil SAE 15 W-50 at temperature–15 С corresponds to a class of viscosity 15 W and at 100 С – to a class 50.

All-weather oils of classes SAE 10 W-30 and 10 W-40 are not recommended for application in engines Audi in a warm season.