11 14 151 Replacing crankshaft radial seal (transmission side)

WARNING: This page is about a different car, the 2005 BMW Z4, 2004 BMW Z4, and 2003 BMW Z4. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: This repair instruction is valid for the following engines:

M40 / M42 / M43 / M43TU / M44
M50 / M52 / M52TU / M54 / M56
S52 / S54

Necessary preliminary tasks:

Remove gearbox
Drain off engine oil
Remove flywheel

Unfasten oil sump screws on transmission end.

Loosen oil pan.

Fig 1: Removing Oil Sump Screws On Transmission End

G03297118

Courtesy of BMW OF NORTH AMERICA, INC.

Release screws in end cover at rear.

Carefully detach oil sump gasket from end cover, remove end cover.

NOTE: After removing end cover:
check oil sump gasket for damage.
If necessary, remove oil sump and replace oil sump gasket.

Fig 2: Releasing Screws In End Cover At Rear

G03297119

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: As from 4/98, a new type of radial seal is used in the Series and as a replacement. This radial seal may only be supported with a "support bushing".
If the radial seal is supported without the support bushing (1) for more than six months, operational reliability will no longer be assured and the radial seal must not be used any further.

Fig 3: Identifying Radial Seal

G03297120

Courtesy of BMW OF NORTH AMERICA, INC.

Distinguishing feature:

New version "without hose spring"
Old version "with hose spring"

IMPORTANT: The sealing lip of the new version (1) is very sensitive and must not be kinked under any circumstances. Do not touch the sealing lip with your fingers.

Fig 4: Identifying Sealing Lip

G03297121

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: The end cover is offered in the kit with a radial seal.

If necessary, lift out the radial sealing ring and drive in new sealing ring using special tool 11 1 260 in conjunction with special tool 00 5 500.

Fig 5: Removing Radial Sealing Ring With Special Tool

G03297122

Courtesy of BMW OF NORTH AMERICA, INC.

Check dowel sleeves (1) for damage and correct installation position.

Replace seal (2).

Apply thin, uniform coat of Drei Bond 1209 sealing compound to edges of joint on oil pan.

Fig 6: Checking Dowel Sleeves

G03297123

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT: Do not use special tool 11 2 213 for the new radial seal version.

Fig 7: Do Not Use Special Tool 11 2 213 For The New Radial Seal Version

G03297124

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: When fitting the end cover with radial seal on the crankshaft, it is only permitted to use the "support bushing (1)" as an installation tool.

Lubricate contact face of crankshaft.

IMPORTANT: Push on end cover with support bushing (1) straight and without tilting sideways.

Fig 8: Installing Radial Seal On Crankshaft

G03297125

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: Screw threads (1) are coated with sealing compound.

Replace screws (1).

Insert all screws and tighten down end cover.

Fig 9: Replacing Screws

G03297126

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: Keep the support bushing (1) of the new radial seal version as a "special tool", then render the special tool 11 2 213 unusable and dispose of it.
The old and new radial seal versions can be installed with the support bushing (1).

Fig 10: Identifying Support Bushing

G03297127

Courtesy of BMW OF NORTH AMERICA, INC.