REP-TAT-P-1121-25 Replacing upper main bearing shell (collar bearing)

• Use the tool (1) for the upper main bearing shell

NOTE: The tool (1) is included in the scope of delivery of the main bearing shell.

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• Insert the tool (1) into the oil hole (arrow) of the crankshaft.

NOTE: RISK OF DAMAGE 
Damage to the engine. 
The engine may be damaged if it is manually rotated in the wrong direction. 

• Rotate the engine in the correct direction of rotation by hand only: a) Clockwise, facing the vibration damper or b) counterclockwise, facing the chain drive. b) only applies if the rear timing chain is installed.

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• Turn the crankshaft in the direction of the engine rotation.
• Turn the crankshaft until the main bearing shell (1) can be removed from the bearing seat.
• Remove the main bearing shell (1).

  Courtesy of BMW OF NORTH AMERICA, INC.

• Continue to turn the crankshaft in the direction of the engine rotation until the new main bearing shell can be placed onto the crankshaft.
• Oil the main bearing shell (1), bearing seat and crankshaft (3) with motor oil.
• Position the main bearing shell (1) on the bearing seat.

  Make sure that the guide lug is installed in the correct position.

• Turn the crankshaft (3) against the direction of engine rotation until the main bearing shell (1) has been completely inserted into the bearing seat with the tool (2).

Courtesy of BMW OF NORTH AMERICA, INC.