BMW 3 Series E30

since 1983-1994 release

Repair and operation of the car



BMW E30
+ 1. Maintenance instruction
- 2. Maintenance
   2.2. The recommended lubricants and liquids
   2.3. Frequency 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. Replacement of oil in the engine and an 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 the drive of hinged units
   2.14. Check and adjustment of turns and quality of mix (SO) of idling
   2.15. Check of a state and battery charging
   2.16. Check and replacement of candles
   2.17. Check of high-voltage wires, runner and cover of the distributor
   2.18. Check of level of oil in the 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 the cooling system
   2.25. Check of the exhaust system
   2.26. Check of shock-absorbers, suspension bracket and steering
   2.27. Check of covers of half shafts
   2.28. Check of brakes
   2.29. Check of brushes of screen wipers
   2.30. Replacement of liquid in automatic transmission and the filter
   2.31. The cooling system – replacement of liquid and washing
   2.32. Replacement of the fuel filter
   2.33. Replacement of oil in the manual transmission
   2.34. Replacement of oil in a case of the main transfer
   2.35. Check of system of catching of vapors of 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. Useful tips



2.28. Check of brakes

GENERAL INFORMATION

Prevention

Besides periodic check of a brake it is necessary to check every time at removal of a wheel, or at suspicions for their malfunction.


The system of brakes of the considered cars is equipped with wear sensors with the light alarm system. Fire of a control lamp of brakes indicates the need of immediate replacement of blocks.

Indicate a side drift of the car when braking the need of immediate check of brakes, the excessive course of a pedal of a brake, a brake pedal pulsation (is the normal phenomenon at operation of the ABS system), liquid dribble.
PERFORMANCE ORDER
Hoses and tubes
1. Lift the car and remove wheels. Check existence on hoses of cracks, swelling and other damages. Check existence of dribbles on unions of tubes and hoses. Replace the damaged details.
Disk brakes
2. Quickly it is possible to check the residual thickness of material of slips on blocks of brakes through a window in a support of a forward brake. If residual thickness at least of one slip less than 2,0 mm, or wear of slips uneven, then replace all four blocks in a set.
3. Check a condition of a disk, having removed a support (see subsection 10.5). At detection of zadir, the painted sites (traces of a strong warming up), traces of deep development, remove a disk and a proshlifuyta or replace both disks (see subsection 10.6).
Drum brakes
4. Remove a drum (see subsection 10.7).
5. Check thickness of brake overlays of back blocks and their state. If thickness of glued slips is less than 2,0 mm (or distance from slips to heads of rivets less than 2,0 mm), then replace overlays in a set with an axis. Slips should be replaced also at detection of cracks, a glossy surface, or at pollution with brake fluid or lubricant.
6. Check a condition of springs and the mechanism of the regulator.
7. Check existence of traces of dribbles of brake fluid on wheel cylinders for what carefully hook and take away an external sealant of the cylinder.
8. If under a sealant traces of brake fluid are found, then replace the cylinder or a sealant (see subsection 10.8).
9. Check existence on drums of deep development, cracks, furrows and the painted sites. If defects cannot be removed with an emery paper, then drums should be removed and pierced.
Emergency brake
10. The emergency brake should be adjusted if the car does not keep on an abrupt bias (see subsection 10.11).