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BMW 3 Series E30since 1983-1994 releaseRepair and operation of the car |
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BMW E30 + 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? |
14:17. A gear belt for the gas distribution mechanism drive
Today gear belts found "second wind". Practically all car makers equip the cars with the elastic drive. The German designers went further away. They widely apply a double gear belt (Duplex) as reliable connection of a cam-shaft with the krivoshipno-conrod mechanism. The gear belt has a number of advantages before a chain. It it is obvious more expensively. It is much simpler to make a belt, than a chain. By and large, it is the closed tape from maslobenzostoyky rubber reinforced by a kapron cord with teeths, pirvulkanizirovanny to it. If to compare it to a chain, then comparison will appear not in favor of the last. The belt is much lighter than a chain that, naturally, cannot but affect the mass of the engine. Besides, engine equipped with a belt, fellow much more quietly equipped with a chain. Also "elastic band" out of an engine casing is mounted that affects time of its installation or replacement. For example, at the author of these lines on replacement of a GRM belt with the subsequent its installation on tags 25–30 minutes leave. With a chain such focus will not pass. At the correct service and control the gear belt goes long. Domestic manufacturers, we will remind, give a guarantee for a run in 60 thousand km, foreign – and that it is more. Rover managed to postpone the time of replacement of a belt to 160 thousand. What the correct control and service of this simple adaptation consists in? At least, than each 15–30 thousand km correctness of situation and tension of a belt has to be checked. However it does not mean that it is only necessary to remove a casing and to check, whether on the place a belt. It is the best of all to examine it, having removed from the engine. Sometimes it is difficult to notice that one of teeths overstrained. If it already occurred, then be sure that he will not stretch. Therefore, having taken off a belt, make on it a mark chalk, and further tooth behind tooth "banish" it. After installation it is also necessary to check the provision of guides and a natyazhitel. All these elements have to be on one axial, otherwise the belt will work with a distortion that will not do it good. Important factor for work of a belt – absence on its surface of oil. Whatever was maslobenzostoyky rubber of which the belt is made, nevertheless it is not that case when "oil you do not spoil porridge". Here oil just to the detriment. Therefore it is periodically necessary to pay attention to a condition of epiploons. And if you noticed an oil leak, try to eliminate somewhat quicker it. As practice shows, stay of a belt in the oil environment cuts its resource by half, and even three times. If to ignore this control, then consequences will not keep themselves waiting long. Through 40-50 thousand km at the expense of a belt pulling the necessary tension weakens and it begins to whip. As a result of it the heavy cam-shaft rotates not synchronously, and with lag. This asinkhroniya of operation of the motor leads to a bigger weakening of a belt. As a result there are excessive loads of teeths. The break of several teeths in a row can lead to the fact that once the cam-shaft will remain motionless while the knee will rotate. At such moments open valves meet pistons. Result – a fiasco or a bend of the valve, its broken plugs, the broken-off cam-shaft. There are, however, also exceptions when the break is painless practically. However it is possible only on those cars in which specially on this case there are pro-points in pistons. For example, our VAZs, namely cars with VAZ-2105 engines, 1300 cubic cm, and VAZ-2108, 1500 cubic concern them see. If the car is not equipped with such engine, break of a belt costs the owner in the round sum connected with overhaul of the engine. Cost, for example, of a belt on BMW reaches of $40. repair of the engine on the same Saab will cost of $5000. For VAZ "nine" the belt can be bought for of $25. And here repair of a cursor will pull for of $400. |
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