11 28 010 Replacing alternator drive belt (M52 / S52 / M52TU / M54 / M56)

NOTE: If the drive belt is to be subsequently reused:
Mark direction of travel and reinstall drive belt in same direction of travel.

Necessary preliminary tasks:

Remove fan clutch with fan impeller
Remove A/C compressor drive belt, refer to 11 28 050 REPLACING A/C COMPRESSOR DRIVE BELT (M52 / S52 / M52TU / M54 / M56)

Remove cap from tensioning roller.

Fig 1: Removing Cap From Tensioning Roller

Courtesy of BMW OF NORTH AMERICA, INC.

Relieve tension on belt drive.

Fig 2: Removing Drive Belt

Courtesy of BMW OF NORTH AMERICA, INC.

Remove drive belt.

IMPORTANT: Drive belt must be replaced if fouled with hydraulic fluid.

Installation:

Check drive belt for coolant and oil residues, replace if necessary.

Installation:

Check that belt is correctly positioned on belt pulleys.

Fig 3: View Of Belt Position

Courtesy of BMW OF NORTH AMERICA, INC.

Version with auxiliary tensioning roller.

Fig 4: View Of Belt Position With Auxiliary Tensioning Roller

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

Locking device of auxiliary tensioning roller must snap into groove on alternator.

Fig 5: Identifying Locking Device Of Auxiliary Tensioning Roller

Courtesy of BMW OF NORTH AMERICA, INC.

Version on E85.

Fig 6: Identifying Locking Device Of Auxiliary Tensioning Roller (E85)

Courtesy of BMW OF NORTH AMERICA, INC.

Version on E60/E65.

Fig 7: Identifying Locking Device Of Auxiliary Tensioning Roller (E60/E65)

Courtesy of BMW OF NORTH AMERICA, INC.