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?


14:25. Antifreeze you should not disturb with antifreeze …


Quite often at operation of the second-hand foreign cars which are just driven from abroad motorists make mistakes which result in the most deplorable results. How to avoid them? For example, if in the five-year foreign car driven under the order familiar motorists advise you to check levels of all technical liquids and oils and if necessary to add them to norm, – you should not hurry. Because at THIS MOMENT OWNERS of JUST BOUGHT FOREIGN CARS ALLOW ONE OF the MOST FREQUENT MISTAKES WHICH CAN LEAD TO BREAKAGE of the ENGINE. In particular, many facts of improper maintenance of the cooling system of the motor are known. So, if in the fall, on the eve of cold weather, cooling liquid is usually changed completely, then on spring – only partially. And very often at the same time motorists add in the cooling system at all not those liquids which are recommended for this model of the foreign car. At most of them in system antifreeze is used, and our car owners fill in antifreeze or that too happens, – nonfreezing liquid for a washer of glasses. What it leads to? Here to you concrete example. Came to repair BMW at which the engine constantly overheated. By the way, car arrived after inspection in two authorized service centers. There to it several times changed thermostats, pomp, temperature sensors, but cardinally it was not succeeded to correct a situation. It was necessary to suffer fairly until at last, the true cause of defect – a contamination of a so-called tunnel steam discharge tube became clear. And there was it because of mixture of antifreeze to antifreeze, and problems began for the second day after its dolivka in the cooling system.

So, buying in the market or in car showroom the second-hand foreign car, you should not be trusted especially assurances of sellers that the car had pre-sale training and liquid in the cooling system it is replaced. Change it independently better.

In practice quite often such situations when engines with considerable – under 300.000 km – a run have quite small – no more than of 50% – wear meet. At the same time there are a lot of cars with a run to 100 thousand kilometers from which the engine already demands capital repairs. Their inspection shows that the overheat caused by any defects of the cooling system is the main reason for strong wear. Not all know that the system of indication of temperature of the engine possesses a certain lag effect. It means that temperature of the motor can already exceed an admissible limit, and the arrow of the indicator did not enter the red forbidding sector yet. Therefore we advise: at the first signs of the movement of an arrow of the device to border of a red zone stop all attempts to arrive under the own steam home. Know that after the liquid circulation termination in two-three minutes in a head of the block the steam stopper is formed and the avalanche temperature increase begins. What, in turn, quite often leads to deformation of a head of the block, failure of knots and details of the gas-distributing mechanism.