BMW 3 Series E30

since 1983-1994 release

Repair and operation of the car

- 1. Maintenance instruction
   1.1.2. Overall dimensions
   1.1.3. Driver's seat
   1.1.4. Dashboard
   1.1.5. Keys for the car equipped with an immobilizer
   1.1.6. Window regulators
   1.1.7. Safety cushions
   1.1.8. On-board computer
   1.1.9. Indexes
   1.1.10. Voltmeter
   1.1.11. Tachometer
   1.1.12. The counter of the total passable way
   1.1.13. Sound signal
   1.1.14. 3-staged automatic transmission
   1.1.15. 4-staged automatic transmission
   1.1.16. Mechanical transmission
   1.1.17. Emergency brake
   1.1.18. Car running in period
   1.1.19. Fuel
   1.1.20. Threefold catalytic converter
   1.1.21. Engine oil
   1.1.22. Brakes
   1.1.23. Rules of placement of freight in a luggage carrier
   1.1.24. Launch of the engine and driving
   1.1.25. Methods of driving
   1.1.26. Towage of the trailer
   1.1.27. Actions at refusal of launch of the engine
   1.1.28. A start order from the additional battery
   1.1.29. If the engine decayed during the movement
   1.1.30. Actions at an engine overheat
   1.1.31. Actions at a wheel puncture
   1.1.32. Rules of towing
   1.1.33. Check of pressure in tires
   1.1.34. Check of a state and replacement of tires
   1.1.35. Shift of wheels
   1.1.36. Installation of winter tires and chains
   1.1.37. Check of an external condition of the battery
   1.1.38. Battery charging
   1.1.39. Specifications
+ 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


1.1.16. Mechanical transmission


Scheme of gear shifting

At inclusion of transfer press a coupling pedal, then smoothly release. It is not allowed to hold a leg on a coupling pedal during the movement, otherwise violation of normal work of coupling is possible. Also inadmissibly to put the car on transfer to hold on rise, for this purpose use the emergency brake.

Too early switching to an overgear and too late switching to lowered leads to an overload of the engine and emergence of knocks. Frequent gear shifting at maximum permissible speeds of the movement is the reason of the accelerated wear of the engine and the increased fuel consumption.

Councils for driving

If inclusion of a backing from neutral position of the lever is difficult, then for a moment release a pedal of coupling and repeat inclusion

Do not include the 5th transfer when towing the trailer to avoid increase in a brake way of the car against norm.

System of blocking of interaxal differential (for cars with the all-wheel drive)

The system of blocking of interaxal differential is intended for increase in traction qualities of the car in the following situations.

If forward or back wheels come off a paving, or adjoin to a slippery covering.

One of four wheels comes off a paving, or adjoins to a slippery covering.

Preventive measures

At uneven wear of forward or back wheels smoothness of blocking or unblocking of interaxal differential can be broken.

Before blocking of differential be convinced that wheels do not revolve.

Unblock differential right after use of blocking.

In those cases when the control lamp on the dashboard does not light up, or dies away only if after repeated pressing of the button of blocking of differential the car passes small distance, address to service of car service for check of an electric chain and the mechanism of blocking.

Security measures

Under normal conditions the movements it is necessary to unblock interaxal differential as when blocking half shafts passing of turns is at a loss.

For blocking of differential:

1. Press a pedal of a brake and stop rotation of wheels.

2. Put forward wheels as it is possible closer to the provision of driving on a straight line.

3. Press blockings of interaxal differential the button. On the dashboard the control lamp has to light up.

When blocking differential the control lamp continues to burn.

In certain cases the lamp does not light up at the time of pressing of the button.

To unblock differential:

1. Turn forward wheels as it is possible closer to the provision of driving on a straight line.

2. Repeatedly press blockings of interaxal differential the button. The control lamp on the dashboard has to go out. If the lamp does not die away, then let's the car pass a little at a small speed.