11 14 005 Replacing front crankshaft seal (N55) as of 02.2014

Special tools required: 

• 11 0 371
• 11 0 372
• 11 4 370
• 11 9 221
• 11 9 222
• 11 9 224
• 11 9 231
• 11 9 233
• 11 9 234
• 11 9 235
• 2 303 795

Necessary preliminary tasks: 

• Remove VIBRATION ABSORBER .

If the central bolt is released, the sprockets of the timing chain and the oil pump will no longer be non-positively connected to the crankshaft. Intake and exhaust camshafts can turn in relation to crankshaft.

Risk of damage! 

Fig 1: Identifying Central Stop Bolt

Courtesy of BMW OF NORTH AMERICA, INC.

Screw special tool 11 0 371 to 80 Nm into crankshaft seal.

Screw in spindle 11 0 372 .

Release crankshaft seal from housing.

Repeat the operation several times if necessary.

Fig 2: Identifying Special Tool (11 0 371)

Courtesy of BMW OF NORTH AMERICA, INC.

Carefully saw open crankshaft seal (1) at cutting line (2).

Remove crankshaft seal (1) from special tool 11 0 371 .

Fig 3: Identifying Crankshaft Seal And Cutting Line

Courtesy of BMW OF NORTH AMERICA, INC.

The engine block will not be leak proof at the outside of the crankshaft seal if you fail to comply with the individual work steps and the work sequence.

Push radial shaft seal (1) 11 9 235 carefully in direction of arrow on the special tool.

Fig 4: Pushing Radial Shaft Seal

Courtesy of BMW OF NORTH AMERICA, INC.

Remove support ring (1).

Fig 5: Identifying Support Ring

Courtesy of BMW OF NORTH AMERICA, INC.

Fasten special tool 11 9 235 onto crankshaft by 2 screws (1).

Fig 6: Installing Special Tool (11 9 235) Onto Crankshaft

Courtesy of BMW OF NORTH AMERICA, INC.

Position radial shaft seal (1) on crankcase in direction of arrow using special tool 11 9 235 .

Fig 7: Positioning Radial Shaft Seal On Crankcase

Courtesy of BMW OF NORTH AMERICA, INC.

Insert radial shaft seal flush into crankcase with special tool 11 9 231 and 2 303 795 .

Fig 8: Inserting Radial Shaft Seal Into Crankcase Using Special Tool (11 9 231)

Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.