E30 series BMW 3

since 1983-1994 of release

Repair and car operation

+ 1. Maintenance instruction
+ 2. Maintenance
+ 3. Engine
+ 4. Cooling system
+ 5. Heating and ventilation
+ 6. Fuel system
+ 7. Exhaust system
+ 8. Transmissions
+ 9. Coupling
+ 10. Brake system
+ 11. Running gear
+ 12. Body
+ 13. Electric equipment
- 14. Good advice
   14.2. Changed numbers
   14.3. Purchase of the old car or mysterious set of figures and letters
   14.4. Durability of the car
   14.5. About parallelism of bridges of the car and the trailer
   14.6. Preparation of the car for winter
   14.7. Rule 35
   14.8. Choice of the second-hand car
   14.9. Engine oils
   14.10. That it is necessary to know, changing oil
   14.11. Emergence in deposit oil
   14.12 whether. It is possible to mix import oils?
   14.13. "Eats" much, but silently goes
   14.14. It is rather live, than it is dead …
   14.15. It is not got - good advice
   14.16. Visit to car-care center
   14.17. A gear belt for a drive of the mechanism of a gazoraspredeleniye
   14.18. Wear of pistons
   14.19. Valves
   14.20. Bearings of engines
   14.21. Engine pollution
   14.22. As the conditioner works and what to do, if it failed
   14.23. Conditioner: not only "pluses", but also "minuses"
   14.24. Rules of service of the conditioner
   14.25. It is not necessary to stir antifreeze with antifreeze …
   14.26. That it is necessary to know upon purchase of the air filter
   14.27. Engine overheat
   14.28. That it is necessary to know to the owner of the car with the injector engine
   14.29. Accumulator
   14.30. Possible malfunctions of the storage battery
   14.31. What to do with the failed generator
   14.32. The belt is guilty, and we blame the generator
   14.33. Catalyst
   14.34. Rub in one - or how to save the catalyst
   14.35. Probuksovochka
   14.36. Features of operation of brake system
   14.37. Malfunctions of brake system
   14.38. Brake liquids
   14.39. ABS: natural choice
   14.40. Rims
   14.41. We update rims
   14.42. Scheme of marking of a car tire
   14.43. Metal corrosion
   14.44. Automake-up
   14.45. What creaks?
   14.46. Hatch
   14.47. Safety cushion: troubles or pleasures?
   14.48. We fit well?
   14.49. Anticreeping "immunodeficiency"
   14.50. Why headlights grow dull
   14.51. "Galogenki"
   14.52. About the correct adjustment of headlights
   14.53. Electric motor
   14.54. From change of places "composed" changes nothing?


14.21. Engine pollution


In operating time the engine and all its systems gradually become soiled even at the correct operation and use qualitative fuel-lubricants, not to mention the poor-quality. How to get rid of these stratifications?

For removal of resinous, varnish and other deposits, deposits special solvents are necessary. Such preparations are studied and used more than 70 years. The composition of solvents and cleaners can include oil products (kerosene, low-viscous oil, diesel fuel, light gasoline), aromatic hydrocarbons (benzene, toluene, a xylol, naphthalene, a mix of koksokhimichesky production), alcohols (methanol, the ethanol, some highest alcohols), хлорпродукты (хлорнафталин, хлордифенилоксид, four-chloric carbon, хлорбензол, a dichloroethane, etc.) turpentine, этилацетат, acetone. Sometimes add нафтенат lead, стеарат the aluminum, some vegetable and animal oils and fats, acetic acid or its anhydride, ammoniac connections, etc. The composition of various solvents and cleaners is not identical. The vast majority of them has strong dissolving properties and, unfortunately, affect not only deposits, but also on polymers. Besides, they differ high toxicity and a korroziynost. Therefore it is necessary to choose carefully such products, using a professional advice.

The majority of solvents and cleaners are intended for separate units, systems, knots or details and are effective only at observance of appropriate technology of their use. Therefore to carry out cleaning by them follows, or separating these units or details, or in a certain sequence. At first clear fuel system, then – oil as products of cleaning of fuel system can get to oil. However, some firms suggest cleaning of the engine to carry out at the same time, using the latest solvents.

After fast (5–10 minutes) cleanings of fuel and oil system on HUNDRED for maintenance of purity of the engine, prevention of accumulation of a various precipitation it is possible to use special "dolgodeystvuyushchy" solvents which periodically add in fuel and oil. Such solvents are intended for resinous substances and do not dissolve varnishes, deposits. For engine maintenance in purity follows more often than it is determined in technical data sheet by service of cars, to replace oil. It is especially important. Operating time of synthetic and mineral oils equally. When using synthetic oil the engine, as a rule, becomes soiled less.

Now relatively some additives to oils which as advertizing assures, "reduce wear of the engine, increasing capacity and profitability". It is a question of antiiznosny additives and additives (modifiers of a friction and metalplating additives). The essence of their action consists that they get into microcracks, forming on a metal surface a film protecting from wear. At mechanical wear gaps increase, pressure in oil system falls, the compression in cylinders decreases, fuel consumption and engine oil grow.

"Salutary" properties of lubricants into which structure the high-dispersed additives are entered, are known for a long time. In engine oils the kopressiya in cylinders and pressure in oil system at the expense of reduction of gaps owing to what fuel consumption and oils on burning out go down can really increase input of metal additives. The friction modifier to which the molybdenum disulfide belongs, for example, at the same time reduces factor of a friction a little.

Antiiznosnye and additives to oils for worn-out engines can be used additives, but to choose them it is necessary attentively not to damage to the engine. Not забывйте that noisy advertizing becomes for this purpose, чтобя to sell the goods, despite its quality.