BMW 3 Series E30

since 1983-1994 release

Repair and operation of the car

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, a xylol, naphthalene, mix of coke-chemical production), alcohols (methanol, ethanol, some highest alcohols), chlorproducts (chlornaphthalene, хлордифенилоксид, four-chloric carbon, benzene chloride, a 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, 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 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.