Replace lower crankshaft guide bearing shells (B48) (John Cooper Works ALL4)

IMPORTANT: Replace main bearing bolts.
There must be no oil in the blind holes (risk of cracking) .
Do not wash off screw coating.
Incorrect assembly of the bearing caps will result in damage to the crankcase.

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT: The guide bearing is located at the 3. bearing seat.

Installation note:

Bearing shell (1) with lubricating groove must be fitted in upper section of crankcase.

Bearing shell (2) without lubricating groove must be installed in lower part of crankcase.

Preliminary work needed:

Remove OIL SUMP

Unscrew all bolts.

Remove reinforcement (1).

Courtesy of BMW OF NORTH AMERICA, INC.

Loosen main bearing bolts 1 and 2 from main bearing cap (3).

Courtesy of BMW OF NORTH AMERICA, INC.

Remove standard main bearing shell (1) without lubricating groove from the bearing cap (see arrows in illustration).

Courtesy of BMW OF NORTH AMERICA, INC.

Insert new guide bearing shell (1) without lubricating groove in arrow direction.

Courtesy of BMW OF NORTH AMERICA, INC.

Insert thrust bearing lid (1) with a new guide bearing shell (2) precisely into the bearing cap (see arrows in illustration).

Courtesy of BMW OF NORTH AMERICA, INC.

Join main bearing cap (3).

Screw in the main bearing bolts (1 and 2).

Tightening torque: 11 11 1 AZ .

Courtesy of BMW OF NORTH AMERICA, INC.

Parts : Replace screws.

Install reinforcement (1).

Tighten down all screws.

Tightening torque: 11 41 3AZ .

Courtesy of BMW OF NORTH AMERICA, INC.

Required follow-up work:

Assemble engine.