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33 21 071 Replacing Both Gaiters On Left And Right Of Output Shaft

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Special tools required: 

Necessary preliminary tasks: 

Clean output shaft.

Press off sealing cap (1).

Installation: 

Press on sealing cap with a thrust ring

Coat sealing faces of sealing cap with sealing compound.

Fig 1: Pressing On/Off Sealing Cap With Thrust Ring
G04742532Courtesy of BMW OF NORTH AMERICA, INC.

Unfasten hose clip (2).

Press cap (3) off together with gaiter.

Remove circlip (4).

Installation: 

Turn new gaiter with cap (3) so that fastener of large hose clamp is between two bores of constant-velocity joint.

Fig 2: Identifying Hose Clip, Cap And Circlip
G04742533Courtesy of BMW OF NORTH AMERICA, INC.

Special tool 26 1 110 must be used in accordance with diameter of output shaft. Bearing inner race must rest on rib of special tool.

Hollow shaft only: Also use special tool 21 2 120. Press splined shaft out of constant-velocity joint.

Clean constant-velocity joint carefully and remove all traces of old grease.

Check constant-velocity joint for damage, replace if necessary.

Detach gaiter from splined shaft.

Fig 3: Identifying Special Tool 26 1 110 And 21 2 120
G04742534Courtesy of BMW OF NORTH AMERICA, INC.

Installation: 

Pull gaiter onto cap (3).

Coat sealing surface of cap (3) with sealing compound and press with a thrust ring onto constant-velocity joint.

Fill constant-velocity joint with high-temperature grease.

Install new circlip.

Press constant-velocity joint and cap (3) over inner bearing race on splined shaft.

Mount special tool 33 2 100 with corresponding insert. Push new gaiter onto splined shaft.

Fig 4: Identifying Special Tool 33 2 100 Onto Cap
G04742535Courtesy of BMW OF NORTH AMERICA, INC.

Release hose clamps (5, 6).

Detach gaiter from splined shaft.

Clean joint carefully and remove all traces of old grease.

Installation: 

Pull new gaiter on.

Thoroughly clean joint while assembled and remove old grease completely.

Fig 5: Identifying Hose Clamps
G04742536Courtesy of BMW OF NORTH AMERICA, INC.

Disassembling/assembling constant-velocity joint: 

NOTE: Mark positions of ball hub, ball cage and joint with respect to each other with electric inscriber.
Ensure all parts are clean prior to assembly.
Fig 6: Identifying Mark Positions Of Ball Hub, Ball Cage And Joint
G04726473Courtesy of BMW OF NORTH AMERICA, INC.