1. Guide sleeve
2. Hinge disk
3. Vibration damper
4. Knurled bolt
5. Bolt
6. Self-locking nut
7. Dust
8. Deep groove ball bearing
9. Middle support
10. Dustcoat
11. Retaining ring
12. Serrated washer
13. Clamping ring
14. Threaded ring
15. Bolt
16.-18. Sanitary nut M10
Various cardan shafts are installed: most often a cardan shaft with a front articulated disk is installed, see figure. Cardan shafts are also installed, which instead of hinged disks have hinges of equal speeds. Take into account the differences when removing.
Withdrawal
Raise the car.
Remove the complete exhaust system.
Remove the catalytic converter heat shield.
If present, unscrew fasteners -1- and -2-. Unscrew clip -3- from underbody of vehicle, while paying attention to its installation position for subsequent installation. The wide lug -4- faces the front of the vehicle.
Separation of the cardan shaft from the gearbox:
Articulated disc design: Unscrew the articulated disc from the gearbox. At the same time, unscrew only the nuts, not the bolts. Design with front crosspiece: Unscrew the crosspiece from the gearbox flange.
Loosen threaded ring -arrow- with BMW tool 261040 a few turns. If this tool is not available, loosen the threaded ring with a pipe wrench.
Remove the driveshaft from the rear axle reduction gear. In doing so, block the shaft with a pry bar.
Remove center support -A- (Drawing W 3022).
Bend the cardan shaft downwards and pull it out of the centering pin in the gearbox. If necessary, push the shaft completely into the movable joint.
Attention: Do not separate the cardan shaft at the point of the sliding element.
Caution: Do not drop the cardan shaft. The rubber cuff of the constant velocity joint can be especially damaged.
Installation
In the presence of vibrations and noises, the cardan shaft must be balanced in the workshop. In addition, you can check the angle of inflection of the cardan shaft.
Attention: The cardan shaft is balanced as a set and can only be replaced as an assembly. Replace worn cardan shafts.
Before installation, check the centering disk of the cardan shaft, if necessary, lubricate the disk with Molykore Longtherm 2. Replace the damaged disk.
Push the propeller shaft with an assistant into the centering pin of the gearbox.
Screw on the center support with a tightening torque of 22 Nm. In this case, shift the middle support with an interference fit E = 4-6 mm in the direction of travel.
Screw driveshaft to rear axle reduction gear. If possible, only the nuts or only the bolts on the flange side should be turned to avoid overtightening of the cardan shaft. Install new self-locking nuts with a tightening torque of 70 Nm.
Bolt driveshaft to propshaft and gearbox. Tightening torques: M8 bolts - 45 Nm; M10 - 70 nm; M12 - 80 nm. If possible, tighten only the nuts or only the bolts on the flange side to avoid over tightening the hinged disk. Block the cardan shaft from turning with a pry bar.
Tighten threaded ring to 17 Nm (Drawing W 3022). If there is no special tool, tighten with a pipe wrench.
Screw on the heat shield of the catalytic converter.
Screw on the cross member with a tightening torque of 20 Nm. The wide ledge of the beam should face forward.
Install the exhaust system.
Lower the car.