BMW 3 Series E30

since 1983-1994 release

Repair and operation of the car

+ 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. Useful tips
   14.2. The 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 trailer
   14.6. Preparation of the car for winter
   14.7. Rule 35
   14.8. Choice of the used car
   14.9. Engine oils
   14:10. What needs to be known, changing oil
   14:11. Emergence in deposit oil
   14:12. Whether it is possible to mix import oils?
   14:13. "Eats" much, but quietly goes
   14:14. It is rather live, than is dead …
   14:15. It is not got - useful tips
   14:16. Visit to car service
   14:17. A gear belt for the gas distribution mechanism drive
   14:18. Wear of pistons
   14:19. Valves
   14:20. Bearings of engines
   14:21. Pollution of the engine
   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. Antifreeze you should not disturb with antifreeze …
   14:26. What should be known upon purchase of the air filter
   14:27. Engine overheat
   14:28. What should be known to the owner of the car with the injector engine
   14:29. Accumulator
   14:30. Possible malfunctions of the rechargeable 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 the brake system
   14:37. Malfunctions of the brake system
   14:38. Brake fluids
   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. Galogenka
   14:52. About the correct adjustment of headlights
   14:53. Electric motor
   14:54. From change of the places "composed" nothing changes?


14:21. Pollution of the engine


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 low-quality. How to get rid of these stratifications?

For removal of resinous, varnish and other deposits, deposits special solvents are necessary. Such medicines 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, xylol, naphthalene, mix of coke-chemical production), alcohols (methanol, ethanol, some highest alcohols), chlorproducts (chlornaphthalene, хлордифенилоксид, four-chloric carbon, benzene chloride, dichloroethane, etc.), turpentine, ethyl acetate, acetone. Sometimes add lead naphthenate, aluminum stearate, 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 the strong dissolving properties and, unfortunately, affect not only deposits, but also polymers. Besides, they differ in high toxicity and corrosion. Therefore it is necessary to choose carefully such products, taking a professional advice.

The majority of solvents and cleaners are intended for separate units, systems, knots or details and are effective only at respect for appropriate technology of their use. Therefore it is necessary to carry out cleaning by them, 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 to carry out cleaning of the engine at the same time, using the latest solvents.

After bystry (5–10 min.) cleanings of fuel and oil system on HUNDRED for maintenance of purity of the engine, prevention of accumulation of various rainfall it is possible to use special "dolgodeystvuyushchy" solvents which periodically add to fuel and oil. Such solvents are intended for resinous substances and do not dissolve varnishes, deposits. For maintenance of the engine 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 rather some additives to oils which as advertizing assures, "reduce wear of the engine, increasing the power and profitability". It is about antiiznosny additives and additives (modifiers of friction and the metalplating additives). The essence of their action consists that they get into microcracks, forming the film protecting from wear on the surface of metal. At mechanical wear gaps increase, pressure in oil system falls, 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 due to reduction of gaps can really increase input of metal additives owing to what fuel consumption and oils on burning out go down. The modifier of friction to which the molybdenum disulfide belongs, for example, at the same time reduces friction coefficient a little.

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