Audi A4

since 1994 release

Repair and operation of the car



A4 Audi
+ Running gear
- Regular servicing
   Installation in a starting position of the indicator of frequency of maintenance
   Crossing of dates of maintenance
   The plan of maintenance for the motorist
   Diagnostics in Audi workshop
   Diagnostics of an executive element
   Poll of a database of malfunctions
   Diagnostics as the help to the fan
   Identification of the car
   Safety measures on a workplace
   Jacks
   Greasing of all details
   Check of level of oil
   Oil consumption
   Oil choice with the correct specification
   Viscosity of oil
   Correctly picked up engine oil for Audi
   Replacement of engine oil and oil filter
   Check of level of liquid in system of a servoupravleniye
   Check of level of oil in a mechanical transmission
   Check of level of oil in the drive of the back bridge
   Control of the ATF level in an automatic transmission
   Check of level of oil in the main transfer of an automatic transmission
   Replacement of ATF
   Greasing of drafts, hinges and locks
+ Engines
+ Turbo-supercharging
+ System of an exhaust
+ Cooling system
+ Fuel tank and fuel pump
+ Air filter and channels of absorption
+ System of injection
+ Coupling
+ Transmission and main transfer
+ Suspension bracket of wheels and steering
+ Brakes
+ Wheels and tires
+ Electrotechnical equipment
+ System of ignition
+ Lighting
+ Alarm equipment
+ Tools and devices
+ Heating and ventilation
+ body Details
+ Salon
Search of malfunctions
Technical characteristics





Viscosity of oil

Oil fluidity – i.e. degree of its density or a razzhizhennost – has to be suitable for application in the engine. Compliance to two criteria is necessary:

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

 

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

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

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

Classes of oils according to SAE

Society of autotractor engineers (Society of Automotive Engineers, the USA) 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 an intermediate step of 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 almost not on sale (Germany means), but they still are often applied in vehicle fleets. Use of seasonal oil is not provided in Audi A4.

All-weather oil

More trudozatratny in production and therefore more expensive, than seasonal oil, all-weather oil found the broadest application today. For improvement of viscous and temperature properties (VI) in it long chains of molecules which when heating inflate contain in quality of additive and again contract when cooling. In this regard oil can plastically adapt to temperature and according to the characteristics to cover some classes of viscosity. SAE 15 W-50 oil at a temperature of -15 °C corresponds to a class of viscosity 15 W and at 100 °C – to a class 50.

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