Removing and fitting, sealing or replacing the oil sump (B46/B48 4-Cyl. Engine with RWD) (4' Series Coupe/Convertible, 4' Series Gran Coupe Sedan)

Special tools required:

11 4 470
11 8 780

Necessary preliminary work:

Disconnect BATTERY NEGATIVE CABLE .
Lower FRONT AXLE SUPPORT .
Remove ACOUSTIC COVER from below
Remove STARTER MOTOR .
Drain off ENGINE OIL .

CAUTION: Engines with surface sealant:
Application time of sealing bead max. 10 minutes
Start-up of the assembly is not possible until 25 minutes after the application time.
Failure to comply can lead to leaks in the assembly.

Removal:

Unlock and disconnect connector (1).

Release cable from oil sump at clips (2).

Courtesy of BMW OF NORTH AMERICA, INC.

Vehicle with manual gearbox:

Release screws (1) from transmission.

Courtesy of BMW OF NORTH AMERICA, INC.

Vehicles with automatic transmission:

Release screws (1) from transmission.

Courtesy of BMW OF NORTH AMERICA, INC.

Release screws (1 - 7) from oil sump.

Fig 1: Oil Sump Screws Loosening Sequence

Courtesy of BMW OF NORTH AMERICA, INC.

Release screws (1 - 7) from oil sump.

Fig 2: Oil Sump Screws Loosening Sequence

Courtesy of BMW OF NORTH AMERICA, INC.

Release screws (1 - 3) from oil sump.

Fig 3: Oil Sump Screws Loosening Sequence

Courtesy of BMW OF NORTH AMERICA, INC.

Release screws (1 and 2) from oil sump.

Fig 4: Oil Sump Screws Loosening Sequence

Courtesy of BMW OF NORTH AMERICA, INC.

Engine with liquid sealing compound:

CAUTION: The oil sump can only be released in the areas where an aperture is located in the oil sump.

Release oil sump using screwdriver (1).

Courtesy of BMW OF NORTH AMERICA, INC.

Remove oil sump (1) downwards to the rear.

Courtesy of BMW OF NORTH AMERICA, INC.

Preparation for installation:

Clean sealing residues from oil sump and crankcase.

Clean sealing surface (1) with special tool 11 4 470.

NOTE: Sealing surfaces must be free of oil, grease and cleaning agents.

Courtesy of BMW OF NORTH AMERICA, INC.

Clean sealing surface (1) with special tool 11 4 470.

NOTE: Sealing surfaces must be free of oil, grease and cleaning agents.

Courtesy of BMW OF NORTH AMERICA, INC.

Apply SEALING COMPOUND 2.2 in this area (1).

Make sure that the sealing bead runs along the inner edge.

The oil return orifice must be rounded completely.

NOTE: The oil sump must be installed approximately 10 minutes after application of the sealing compound.

Courtesy of BMW OF NORTH AMERICA, INC.

Sealant height approximately 2 to 2.5 mm.

Installation:

NOTE: Special tool 11 8 780 is only necessary if the engine or the transmission is removed.

Position special tool 11 8 780 with screws (1) of transmission so that oil sump aligns exactly with engine block.

If necessary, replace fitting sleeves.

Attaching the oil sump.

Courtesy of BMW OF NORTH AMERICA, INC.

CAUTION: Installing screws with an incorrect screw length may cause damage to the component.

Observe exact screw lengths.

Reinstall screws corresponding to the original screw length.

The oil sump may be damaged when using the incorrect screw length!

Ensure that the correct screw (2) (M8x40) is used for mounting the oil sump on the transmission.

The screw (1) (mounting bolt of the starter motor) may never be used for mounting the oil sump.

Courtesy of BMW OF NORTH AMERICA, INC.

Install oil sump (1) to front and upwards.

Courtesy of BMW OF NORTH AMERICA, INC.

Insert screws (1 and 2).

Fig 5: Oil Sump Screws Tightening Sequence

Courtesy of BMW OF NORTH AMERICA, INC.

Insert screws (1 - 7).

Fig 6: Oil Sump Screws Tightening Sequence

Courtesy of BMW OF NORTH AMERICA, INC.

Insert screws (1 - 7).

Fig 7: Oil Sump Screws Tightening Sequence

Courtesy of BMW OF NORTH AMERICA, INC.

Insert screws (1 - 3).

Tighten down all screws on oil sump.

Tightening torque 11 13 2AZ .

Fig 8: Oil Sump Screws Tightening Sequence

Courtesy of BMW OF NORTH AMERICA, INC.

Vehicles with automatic transmission:

Tighten screws (1) on transmission.

Tightening torque 24 00 1AZ .

Courtesy of BMW OF NORTH AMERICA, INC.

Vehicle with manual gearbox:

Tighten screws (1) on transmission.

Tightening torque 23 00 1AZ .

Courtesy of BMW OF NORTH AMERICA, INC.

Fasten cable to oil sump with clips (2).

Connect the connector (1).

Courtesy of BMW OF NORTH AMERICA, INC.

Required follow-up work:

Install STARTER MOTOR .
Install LOWER ACOUSTIC COVER .
Fasten FRONT AXLE SUPPORT .
Connect BATTERY EARTH LEAD .
Top up ENGINE OIL .
Check engine for tightness.