33 11 021 Replacing radial shaft seal for drive flange on rear differential

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IMPORTANT: Use only REAR AXLE - OPERATING FLUIDS .
Failure to comply with this instruction will result in serious damage to the rear differential!

Necessary preliminary tasks

Remove PROPELLER SHAFT

Remove retaining clip (1) and insert nut (2) with diaphragm seal.

Fig 1: Identifying Retaining Clip And Diaphragm Seal Nut

G04794569

Courtesy of BMW OF NORTH AMERICA, INC.

Mark position of flange nut (1) to bevel pinion (2).

Fig 2: Identifying Flange Nut And Bevel Pinion

G04794570

Courtesy of BMW OF NORTH AMERICA, INC.

Release flange nut with special tools 33 5 050 and 33 5 070, to do this, grip bevel pinion with special tool 33 5 060 and 33 5 070.

Fig 3: Removing Flange Nut Using Special Tools (33 5 050 And 33 5 070)

G04794571

Courtesy of BMW OF NORTH AMERICA, INC.

Pull out shaft seal with special tool 00 5 010.

Fig 4: Pulling Out Shaft Seal Using Special Tool (00 5 010)

G04754034

Courtesy of BMW OF NORTH AMERICA, INC.

Coat sealing lips of new shaft seal and sealing face of bevel pinion with differential oil.

Drive in shaft seal with special tool 33 0 150 .

Fig 5: Installing Shaft Seal Using Special Tool (00 5 010)

G06910247

Courtesy of BMW OF NORTH AMERICA, INC.

Clean bevel pinion thoroughly to remove remnants of screw-locking agent.

Fig 6: Identifying Bevel Pinion

G04794574

Courtesy of BMW OF NORTH AMERICA, INC.

Check dust cover for damage, replace if necessary.

IMPORTANT: Clean flange nut thoroughly to remove remnants of grease and screw-locking agent.
Pack collar insert (1) of flange nut with grease .
Apply a thin coating of grease to shaded area (2) of flange nut.
Coat at least four thread turns of flange nut with "DREI BOND adhesive type 1385".

Fig 7: Identifying Collar Insert Of Flange Nut With Grease Area

G04794575

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT: In order to avoid damaging the rear differential, do not under any circumstances tighten down the flange nut (1) beyond the marker point of the bevel pinion (2).

Fig 8: Identifying Flange Nut Of Bevel Pinion

G04794570

Courtesy of BMW OF NORTH AMERICA, INC.

Place insert nut (2) with diaphragm seal in flange nut.

Install retaining clip (1).

Fig 9: Identifying Insert Nut With Retaining Clip

G04794569

Courtesy of BMW OF NORTH AMERICA, INC.

After installation

Check OIL LEVEL IN FINAL DRIVE UNIT and top up if necessary.