33 11 021 Replacing shaft seal for drive flange on rear differential (inserted propeller shaft): Notes

WARNING: This page is about a different car, the 2011 BMW 750xi, 2011 BMW 750Lxi, 2010 BMW 750xi, and 2010 BMW 750Lxi. However, it is still accessible from the selected car via links, so may be relevant.

IMPORTANT: Use only APPROVED OIL .

Failure to comply with this instruction will result in serious damage to the rear axle final drive!

Necessary preliminary tasks:

Remove THREE-HOLE FLANGE

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

Fig 1: Identifying Retaining Clip And Nut

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

Courtesy of BMW OF NORTH AMERICA, INC.

Release flange nut with special tools 33 5 050 and 33 5 070 by gripping bevel pinion with special tools 33 5 060 and 33 5 070 .

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

Courtesy of BMW OF NORTH AMERICA, INC.

Pull out radial shaft seal with special tool 00 5 010 .

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

Courtesy of BMW OF NORTH AMERICA, INC.

Coat sealing lips of new radial shaft seal and sealing surface of bevel pinion with final drive oil.

Drive in radial shaft seal with special tool 33 5 080 .

Fig 5: Driving Radial Shaft Seal Using Special Tool (33 5 080)

Courtesy of BMW OF NORTH AMERICA, INC.

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

Fig 6: Identifying Bevel Pinion

Courtesy of BMW OF NORTH AMERICA, INC.

Check dust plate 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 (Castrol Optitemp HAT LF1 ; BMW part number 83 23 0 417 754 ; 50g tube).

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 Grease Applying Areas On Flange Nut (Shaded Area)

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT: In order to avoid damaging the rear axle final drive, 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 And Bevel Pinion

Courtesy of BMW OF NORTH AMERICA, INC.

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

Install retaining clip (1).

Fig 9: Identifying Retaining Clip And Nut

Courtesy of BMW OF NORTH AMERICA, INC.