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11 21 500 Replacing Crankshaft (N62 / N62TU)

CRANKSHAFT REPLACING REFERENCE

Operation: Note:
Remove engine   
Remove cylinder head  (cylinder bank 1 to 4)  
Remove cylinder head  (cylinder bank 5 to 8)  
Remove hub for vibration damper  . See 11 23 031 REMOVING AND INSTALLING/REPLACING VIBRATION DAMPER HUB (N62/N62TU) .  
Removing lower timing case cover  
Removing oil pan   
Remove oil pump   
Removing piston   
Remove flywheel  . See 11 22 000 REMOVING AND INSTALLING/REPLACING FLYWHEEL (N62/N62TU) .  

Release main bearing inclined screw connection (1).

Installation: 

Tightening torque. See ENGINE - TIGHTENING TORQUES -- ALPINA .

Fig 1: Identifying Main Bearing Screw
G04739736Courtesy of BMW OF NORTH AMERICA, INC.

Release spacer bolt (2).

Tightening torque. See ENGINE - TIGHTENING TORQUES -- ALPINA .

Release main bearing screws.

Tightening torque. See ENGINE - TIGHTENING TORQUES -- ALPINA .

Fig 2: Identifying Main Bearing Screws
G04739737Courtesy of BMW OF NORTH AMERICA, INC.

Remove main bearing caps 1 to 5.

Lever out crankshaft.

Fig 3: Identifying Main Bearing Caps
G04739738Courtesy of BMW OF NORTH AMERICA, INC.

Replace main crankshaft bearing shells. 

Replace conrod bearing shells.