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
   9.2. Specifications
   9.3. Coupling check
   9.4. Main cylinder of coupling
   9.5. Coupling pedal
   9.6. The blocking coupling switch
   9.7. Working cylinder of coupling
   9.8. Removal of air from a coupling hydraulic actuator
   9.9. Coupling details
   9.10. Driveshaft
   9.11. Elastic coupling
   9.12. Average support
   9.13. Cardan hinges
   9.14. The forward aligning plug
   9.15. Driveshaft CV JOINT
   9.16. Half shafts
   9.17. CV JOINTS and covers
   9.18. Epiploons of a reducer of a back axis
   9.19. Reducer of a back axis
   9.20. Epiploon of the leading gear wheel of a reducer
+ 10. Brake system
+ 11. Running gear
+ 12. Body
+ 13. Electric equipment
+ 14. Useful tips


9.14. The forward aligning plug


The aligning plug (arrow)

The aligning plug (arrow) is pressed in a forward end face of the driveshaft. At wear of the plug from a forward part of a shaft the increased noise is listened.

The correct position of the aligning plug after a press fitting

And = 4,5 mm

Check and replacement

1. For check of a condition of the plug shake the driveshaft in the cross direction, having turned off bolts and nuts of fastening of the elastic coupling to a check point shaft flange. If the noticeable side play is felt, then replace the plug.

On a part of cars the plug is closed by a dustproof cover which is sometimes deformed at removal of the driveshaft. Damage of a cover should not be considered a consequence of wear of the plug, damage of a cover also does not affect a condition of the aligning plug.

2. Remove the driveshaft.
3. Remove the plug from the driveshaft with hydroblow, having filled with dense lubricant a cavity of the plug and having struck the mandrel with a diameter about 14 mm inserted into the plug.
4. Grease the new plug with molybdenic lubricant and press in the driveshaft. After a press fitting the edge of the plug has to defend from a driveshaft end face on 4,5 mm.