BMW 7 Series: Replacing Cover Gasket On Rear Differential (205AL/225AL) At Rear

IMPORTANT: In event of oil loss, always check rear axle final drive for traces of wear and damage.

Necessary preliminary work

• Catch or draw off final drive oil.
• Remove REAR AXLE FINAL DRIVE.

NOTE: Read and comply with REAR DIFFERENTIAL: ASSIGNMENT TO MODEL SERIES.

IMPORTANT: To avoid leaks from the rear axle final drive lid, do not use a paper gasket in vehicles with liquid sealing compounds! To prevent the final drive oil from foaming over, make sure that no remnants of the liquid sealing compound are pressed into the rear axle final drive housing.

Release screws (1).

Tightening torque 33 11 1AZ.

Remove lid.

Installation note: If necessary, remove remnants of liquid sealing compound with scraper.

Clean sealing surface on lid and rear axle final drive.

Use Loctite 5970 liquid seal from BMW Parts Department.

Fig. 47: Identifying Screws

After installation

• Add FINAL DRIVE OIL.

REPLACING COVER GASKET ON REAR AXLE FINAL DRIVE AT REAR (235L)

WARNING: DANGER OF POISONING if oil is ingested/absorbed through the skin! RISK OF INJURY if oil comes into contact with eyes and skin!

IMPORTANT: In event of oil loss, always check rear differential for traces of wear and damage.

To avoid leaks from the rear differential cover, do not use a paper gasket in vehicles with liquid sealing compounds! To prevent the differential oil from foaming over, make sure that no traces of the liquid gasket are pressed into the housing.

Necessary preliminary work

• Drain and catch final differential oil.
• Remove REAR AXLE FINAL DRIVE.

NOTE: Read and comply with REAR DIFFERENTIAL: ASSIGNMENT TO MODEL SERIES.

Release screws (1).

Tightening torque (M10x50) 33 11 1AZ.

Unfasten screws (2).

Tightening torque (M10x25) 33 11 1AZ.

Remove cover.

If necessary, remove remnants of liquid sealing compound with scraper.

Clean sealing face on cover and rear differential.

Installation note: If a paper gasket was fitted, a paper gasket or liquid sealing compound can be used.

The liquid sealing compound can be found in BMW Electronic Parts Catalogue.

Fig. 48: Identifying Rear Differential Cover Screws

After installation

• Add FINAL DRIVE OIL

REPLACING SHAFT SEAL FOR DRIVE FLANGE LEFT OR RIGHT

Necessary preliminary tasks

• Remove REAR AXLE FINAL DRIVE

Use special tools 00 5 010 and 32 1 060 /33 1 308 to remove radial shaft seal

Fig. 49: Removing Radial Shaft Seal Using Special Tools (32 1 060) And (33 1 308)

Installing new shaft seal

NOTE: The installation protective ring (1) serves to protect the sealing lips on radial shaft seal (2) when the output shaft is being installed.

Fig. 50: Identifying Protective Rings And Sealing Lips On Radial Shaft Seal

IMPORTANT: Installation protective ring (1) must not slip out of radial shaft seal!

Coat housing of sheet metal flange of radial shaft seal with APPROVED FINAL DRIVE OIL.

Drive in radial shaft seal as far as it will go with following special tools (depending on rear axle final drive/outer diameter).

33 5 130
33 5 140

Remove special tool.

Open installation protective ring (1).

Fig. 51: Installing Radial Shaft Seal Using Special Tools (33 5 130) And (33 5 140)

IMPORTANT: High installation forces indicate that the output shaft spline teeth are damaged or deformed! Check gearing, replace damaged parts if necessary.

Coat highlighted contact surface (3) of output shaft with APPROVED FINAL DRIVE OIL.

Fig. 52: Identifying Dust Plate, Circlip And Coat Contact Surface

Insert output shaft into rear axle final drive.

Pull out assembly protection ring at lug (1) until one of the two programmed rupture points gives.

Fig. 53: Identifying Lug

After installation

• Check FINAL DRIVE OIL LEVEL , correct if necessary

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