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Audi A3since 1997 of releaseRepair and car operation |
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Audi A3 + Maintenance instruction + Current leaving and service - Engine Compression check in engine cylinders Engine check by means of the vacuum gage Removal and installation of the bottom cover of an impellent compartment Removal and engine/RKPP installation + Four-cylinder petrol engines 1.6, 1.8 of l + Diesel engines + Major maintenance - Greasing system General recommendations about impellent oils Contour of circulation of oil Dynamic control of pressure of oil Check of pressure of oil and sensor of the index of pressure of oil Removal and pallet installation case/replacement of sealing laying of the pallet of a case + Systems of cooling, heating + the Power supply system and production of the fulfilled gases + engine Electric equipment + Manual box of gear shifting + Automatic transmission and models with a full drive + Coupling and power shafts + Brake system + Suspension bracket and steering + Body + Onboard electric equipment + Elektroskhema 
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Greasing systemGeneral recommendations about impellent oils
Viscosity of oil Viscosity characterizes fluidity of oil. Depending on temperature oil tends to fluidity reduction. In process of increase in temperature oil becomes more fluid. It worsens adhesion of oil and stability to a high pressure. When cooling oil gets denser, fluidity decreases and the internal friction increases. Because of this property it is necessary to apply impellent oil with such viscosity which changes at change of temperature in probably smaller limits. At start of the cold engine oil should be sufficiently liquid excessively not to overload the engine and that after start oil got into all places where greasing is necessary quicker. Fluidity of oil is equivalent to its internal friction and is designated by SAE units (Society of Automotive Engineers – Association of Automobile Engineers), for example SAE 30, SAE 10. The high indicator of SAE means that oil dense, low – characterizes liquid oil. Nevertheless, viscosity of oil completely does not characterize lubricant properties of oil. All-weather oils In engines of Audi A3 cars all-weather oils are used. Advantage of all-weather oils consists that it is not necessary to choose them seasonally. They are made on the basis of liquid seasonal oil (type 10W). In a warm condition this oil is condensed so-called by "the viscosity stabilizer» that provides the corresponding lubricant qualities of oil at all temperatures. When using all-weather oil it is necessary to apply modern grades with a wide temperature range of viscosity, for example 10W–40, 15W–50. 10 viscosity of oil in a cold condition. Than number, especially liquid oil in a cold condition less. W (winter – winter) oil is suitable for application in the winter 40 viscosity of oil in a hot condition. Than number, especially dense oil in a hot condition more. Also light oils (oils can be applied to high capacities). They represent all-weather oils into which as an additive along with others umenshitel of factor of a friction are entered. In light oils as a basis so-called synthetic oils are applied. Classes of viscosity and range of operational temperatures of oil As a range of use of the next classes SAE are blocked, it is possible not to pay attention to short-term temperature fluctuations. Mixing of oils of various classes of viscosity if the oil dolivka is required is allowed, and the surrounding temperature any more does not correspond to a class of viscosity of oil filled in in the engine. ATTENTION
For modern engines it is necessary to use only HD oils. HD oils are oils with the increased lubricant properties improved at the expense of various additives. These additives provide the best anticorrosive protection, more favorable conditions against the oxidation phenomenon, the smallest tendency to formation of the slags, the best change of the viscosity, clearing and dissolving properties. Clearing and dissolving additives not only reduce formation of the remains in the engine, but also ability these remains and all other pollution in impellent oil at the same time possess to dissolve and keep in a suspension so that at oil replacement these pollution are removed together with merged oil. Quality of HD oils is determined by API system (American Petroleum Institut). The European producers also adhere to this system. Designation of a grade of oil is made by two letters. The first letter characterizes a scope: S-Service, are intended for carburetor engines; With – Commercial, are intended for diesel engines. The second letter defines an oil grade in alphabetical order. Premium oils on classification of API are SJ for petrol engines and CF for diesel engines. The European manufacturers classify the oils according to the ACEA specification (Association des Constucteurs Europeens de I‘Automobile) which considers, first of all, the European production technology of engines. Oils for petrol engines of cars have according to the ACEA specification quality classes with A1-96 on A3-96, diesel engines have classes with B1-96 on B3-96, and А3 and В3 represent the highest class of quality. Since 2000 of release (MJ00) within extension of intervals of service (Long–Live–Service), and also new norms are applied to the engine of 154 kW in AUDI S3 cars on impellent VW/AUDI oil. If demanded oil is absent, on cars without Long–Live–Service with petrol engines impellent oil according to ACEA–A2/A3 or API–SF/SG can temporarily be applied. On a turbodiesel API-CD specification oil in this case can be applied. |
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