Replacing the main bearing shells and the guide bearing shells

NOTE: RISK OF DAMAGE
Engine damage caused by incorrectly installed bearing shells and bearing brackets.
If the bearing shells and bearing brackets are installed incorrectly, then engine damage can occur.

Always install all bearing shells and bearing brackets in the same position from which they were removed.

NOTE: TECHNICAL INFORMATION
The main bearing shells and guide bearing shells are classified by numbers.
Observe the classification of the main and guide bearing shells.

Remove the main bearing shells with lubricating groove (1) to (3) and (5) to (7) from the crankcase.
Remove the guide bearing shell with lubricating groove (4) from the crankcase.

Courtesy of BMW OF NORTH AMERICA, INC.
Remove the main bearing shells (1) to (3) and (5) to (7) from the crankshaft bearing caps.
Remove the guide bearing shell (4) from the crankshaft bearing cap.

Courtesy of BMW OF NORTH AMERICA, INC.

Make sure that the correct classification (arrows) is installed.
Replace main bearing shells (1) with lubricating groove.
Parts: Main bearing shells with lubricating groove

Courtesy of BMW OF NORTH AMERICA, INC.
Make sure that the correct classification (arrows) is installed.
Replace main bearing shells (1) without lubricating groove.
Parts: Main bearing shells without lubricating groove

Courtesy of BMW OF NORTH AMERICA, INC.
Make sure that the correct classification (arrows) is installed.
Replace the guide bearing shell with lubricating groove (1) and the guide bearing shell (2) without lubricating groove.

Parts: Guide bearing shells

Courtesy of BMW OF NORTH AMERICA, INC.

Make sure the crankshaft main bearing shell (1) is correctly installed with the guide lug in the highlighted area.

Courtesy of BMW OF NORTH AMERICA, INC.
Make sure the crankshaft guide shell (1) is correctly installed with the guide lug in the highlighted area.

Courtesy of BMW OF NORTH AMERICA, INC.
Make sure the crankshaft main bearing shell (1) is correctly installed with the guide lug in the highlighted area.

Courtesy of BMW OF NORTH AMERICA, INC.

Make sure the crankshaft guide shell (1) is correctly installed with the guide lug in the highlighted area.

Courtesy of BMW OF NORTH AMERICA, INC.
Install the main bearing shells (1) to (3) and (5) to (7) in the crankshaft bearing cap.
Install the guide bearing shell (4) in the crankshaft bearing cap.
Oil all main bearing shells and guide bearing shells (1) to (7).

Courtesy of BMW OF NORTH AMERICA, INC.
Install main bearing shells with lubricating groove (1) to (3) and (5) to (7) in the crankcase.
Install the guide bearing shell with lubricating groove (4) in the crankcase.
Oil all main bearing shells and guide bearing shells with lubricating groove (1) to (7).

Courtesy of BMW OF NORTH AMERICA, INC.