Audi 80/Avant (B4)

since 1991-1995 release

Repair and operation of the car



Audi 80/Avant
- Technical specification
   Engines
   Transmissions
   Body
   Chassis
   15-inch wheels
   Brake system
   Seats
   Passive safety
   Four-wheel drive
   Distributive Torsen-differential
   Dynamics of the movement at a dry paving
   Instructions on operation for all-wheel drive cars
   Blocking of differential of the back bridge
   Motor compartment
   Regular servicing
   Organization of a workplace
   Lubricant works
   Oil consumption
   Right choice of engine oil
   Replacement of engine oil and oil filter
   Check of level of working liquid of the power steering
   Check of level of oil of the mechanical transmission
   Check of level of oil in the drive of the back bridge
   Control of the ATF level in the automatic transmission
   Check of level of oil in the main transfer of the automatic transmission
   ATF replacement
   Lubricant of hummock drives, hinges and locks
+ Engines
+ System of production of the fulfilled gases
+ Cooling system
+ Fuel tank and fuel pump
+ Air filter and airintaking channels
+ System of injection
+ Coupling
+ Transmission and transmission
+ Suspension bracket and steering
+ Brake system
+ Anti-blocking system of brakes
+ Wheels and tires
+ Body electrical system
+ System of ignition
+ Lighting
+ Signaling devices
+ Devices and auxiliary devices
+ Heating and ventilation
+ Body elements
+ Search of malfunctions
+ Specifications





Oil consumption

Part of engine oil burns down during lubricant action. So the consumption of oil is absolutely natural process. Well rolled engines spend 0,2 l for 1000 km, Audi calls the most admissible indicator an expense of 1,0 l on 1000 km.

The oil consumption your Audi 80 depends on the following circumstances:

  • The modulation of oil leads to a high expense because ventilation of a case blows its surplus.
  • Liquid oil burns down quicker, than dense. Seasonal oil becomes in the warmed state liquid as water, and the expense respectively increases. All-weather oil remains to more viscous; first of all those who go on a long distance can notice a smaller consumption of this oil.
  • All-weather oil which remains in the engine too long becomes more liquid, the highest class of a vyazkota "is lost", the need for a dolivka respectively increases.
  • Sharp style of driving except the raised consumption of gasoline increases also an oil consumption. Especially strongly it is noticeable if the new engine is exposed to big loadings at once.
  • During a running in the engine needs bigger quantity of lubricant means.
  • Leakage of the engine. Check according to the scheme described in the head Dvigateli.
  • Defect in the engine; for example, defect of sealing laying (an oil scraper cap) of a valve core, too big gap between a guide and sealing laying of the valve, piston rings are defective or incorrectly established п

The zero consumption of oil is suspicious

At winter operation at short distances maybe so that oil level between measurements is not diminished at all or even increases. It is at all not a reason for joy because means that engine oil is diluted with fuel or condensate. This oil changing the properties needs to be "boiled" during regular distant trips that condensate evaporated. At the end of a trip it is necessary to check the oil level because it considerably will fall because of evaporation of parts of gasoline and condensate! At extreme operation in the city without intermediate trips on a long distance it will be better if you change oil before usual; perhaps, after 3000 km or four months.

It is necessary to reckon with gasoline impurity in oil approximately in 2 — 3% in the winter, and thanks to better to the dosed enrichment of gas mixture in our vpryskovy engines at start of the cold engine in oil less gasoline, than gets to old carburetor.

Correct specification of oil

As at rather long, 15 000 km, intervals of replacement of oil there is a danger of formation of a deposit in an oil case, Audi issued strict instructions to oil.

  • Usual mineral oil has to conform to the Volkswagen 50101 standard (VW-Norm 50101). In this case it has sufficient cleaning properties for prevention of formation of a deposit.
  • Oils with good antifrictional properties reduce internal friction in the engine. They have to conform to the standard 500 00 (VW-Norm 500 00).
  • Only if oil from listed above is inaccessible, it is possible to apply all-weather or seasonal oil of categories "API SF" and "API SG" to a dolivka.

 Hint: such factors as the price of oil or its origin, tell nothing about its quality yet!

Viscosity of oil

The oil fluidity, that is its viscosity, has to conform to requirements for application in this engine. At the same time it is necessary to remember two criteria:

  • Oil should not be too viscous as the starter has to be able to turn the cold engine, and places where in the engine oil gets, have to be greased immediately after launch of the cold engine.
  • Oil should not be too liquid because at high temperatures and turns of the engine the greasing film can become torn.

The schedule shows the recommendations of Audi/Volkswagen concerning viscosity of oil:

And – the all-weather oils meeting the requirements of the standard 50101;
In – the oils with good antifrictional properties meeting the requirements of norm 500 00;
With – the seasonal oils meeting the requirements of API norms of SF or SG.
The given indicators of temperature should be understood as long. Short-term fluctuations do not play any role.

Classes on SAE

The American Society of Automotive Engineers distributed oils on classes according to their viscosity.

Seasonal oil

These classes begin at engine oils with liquid winter (winter) SAE 5W oil, 10W, 15W through an intermediate step of SAE 20W/20 to viscous summer SAE 30, 40 and 50 oils.

Seasonal oil was the cheapest engine oil earlier. For faultless lubricant of the engine in it respectively a season viscous or liquid seasonal oil has to be filled in. Seasonal oil cannot almost be found at gas stations or in supermarkets today, but it still is often applied in vehicle fleets. In Audi 80 it suits for application (and such is opinion of the producer) only as temporary solution in a desperate situation.

All-weather oil

Production of the all-weather oil applied today is more difficult and therefore all-weather oil respectively more expensive, than seasonal. As the additive improving a viscosity index at it there are long chains of molecules which "inflate" when heating and again lose in volume when cooling. In this case oil can "elastically" adapt to temperatures and cover many classes of viscosity. SAE 15W-50 oil corresponds at a temperature of -15 °C to a class of viscosity 15W, and at 100 °C – to a class 50.

At all-weather oils on the basis of mineral oils the fact that the chains of molecules improving viscosity decay over time is problematic and in this case oil becomes not such steady against temperature influences. For this reason of Audi does not allow to apply in the cars all-weather oils of the classes SAE 10W-30 and 10W-40 in warm season.








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