E30 series BMW 3

since 1983-1994 of release

Repair and car operation

+ 1. Maintenance instruction
- 2. Maintenance
   2.2. Recommended lubricants and liquids
   2.3. Periodicity of service
   2.4. Features of routine maintenance of the car
   2.5. General information on additional maintenance
   2.6. Check of level of liquids
   2.7. Check of a condition of tires and pressure in tires
   2.8. Oil replacement in the engine and the oil filter
   2.9. Check and restoration of level of liquid in a wheel
   2.10. Check of level of liquid in automatic transmission
   2.11. Shift of wheels
   2.12. Check and replacement of hoses in a motor compartment
   2.13. Check, adjustment and replacement of belts of a drive of hinged units
   2.14. Check and adjustment of turns and quality of a mix (FROM) idling
   2.15. Check of a condition and battery charging
   2.16. Check and replacement of candles
   2.17. Check of high-voltage wires, begunka and distributor covers
   2.18. Check of level of oil in a manual transmission
   2.19. Check of level of oil in the main transfer
   2.20. Check and adjustment of gaps in valves (except the M40 engine)
   2.21. Draft of a butterfly valve
   2.22. Replacement of the air filter
   2.23. Check of fuel system
   2.24. Check of system of cooling
   2.25. Check of an exhaust system
   2.26. Check of shock-absorbers, suspension bracket and steering
   2.27. Check of covers of semi-axes
   2.28. Check of brakes
   2.29. Check of brushes of screen wipers
   2.30. Liquid replacement in automatic transmission and the filter
   2.31. Cooling system – replacement of liquid and washing
   2.32. Replacement of the fuel filter
   2.33. Oil replacement in a manual transmission
   2.34. Oil replacement in a case of the main transfer
   2.35. Check of system of catching паров gasoline (EVAP system)
   2.36. Installation of the light alarm system of need of servicing
   2.37. Replacement of a gear belt
+ 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


2.12. Check and replacement of hoses in a motor compartment



Hoses of the conditioner are checked and change only in car-care center service.

Under the influence of high temperatures in a motor compartment gradually there is a hardening and destruction of the rubber and plastic hoses which are ensuring functioning of various units of the engine. It is necessary to check periodically a condition of hoses, existence on them of cracks and hardening, weakening of connections, tightness violation.

The procedure for test of hoses of system of cooling and brakes is described in the corresponding subsections (see subsection 2.24 and subsection 10.15).

Almost all hoses fasten by means of collars. Check durability of an inhaling of collars as weakening of fastening leads to tightness violation. In those places in which collars are not provided, check reliability of consolidation of a hose on unions, elasticity loss in such connections owing to swelling or hardening of hoses is not allowed.

Vacuum hoses

Vacuum hoses (almost all treat system of decrease in toxicity) it is possible to distinguish on color, or on the color strips pasted on them. For various systems of the engine vacuum hoses with various in the thickness of walls, mechanical and thermal firmness are used. At replacement track that new vacuum hoses in accuracy corresponded to the replaced.

Often the hose can be checked only after removal from the car. If some hoses act in film, previously put labels on interfaced the union and hoses subsequently not to break their relative positioning.

At check of a condition of vacuum hoses at the same time examine also plastic tees. Check existence on them of cracks, and also hose deformations in a prileganiye place to the union of a tee which can cause tightness violation.

For check of leaks listen through a hose piece, having put it to a checked place. Characteristic "hissing" will indicate leak existence.

Fuel hoses

At a detachment of fuel hoses keep in mind that fuel can be in them under pressure.

Check a condition of rubber fuel hoses, existence of cracks on them about bends and in places of fastenings.

At replacement of hoses of the fuel highway new hoses should correspond in accuracy to the replaced.

At replacement of hoses always establish collars with screw fastening.

Metal tubes

Metal tubes are usually used in the fuel highway of system of injection. Check existence on tubes braided pressed and cracks.

At replacement it is necessary to establish only seamless steel tubes. Tubes from copper or aluminum do not maintain vibrating loadings.

Check a condition of metal tubes and unions of system of a hydraulic actuator of brakes in junctions with the main brake cylinder and the batcher (if it is provided), existence of cracks and the weakened connections is not allowed. At leak detection immediately carefully check all system of brakes.

Power steering hoses

At detection of podtekaniye of liquid replace the damaged hoses of the power steering and their collars.