11 23 031 Removing And Installing/Replacing Vibration Damper Hub (N73)

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NOTE:

For Special Tool identification, see ENGINE- SPECIAL TOOLS .

Special Tools Required:

11 3 454
11 3 460
11 9 451
11 9 452
11 9 453
11 9 455

Necessary Preliminary Tasks:

Remove fan clutch. Refer to 11 52 020 REMOVING AND INSTALLING OR REPLACING FAN CLUTCH (N73) .
Remove alternator drive belt. Refer to 11 28 010 REPLACING ALTERNATOR DRIVE BELT (N73) .
Remove A/C compressor drive belt. Refer to 11 28 050 REPLACING A/C COMPRESSOR DRIVE BELT (N73) .
Remove engine splash guard.
Remove vibration damper. Refer to 11 23 010 REMOVING AND INSTALLING/REPLACING VIBRATION DAMPER (N73) .
Remove tensioner from A/C compressor drive belt.

Secure special tool 11 9 451 in conjunction with special tool 11 9 452 (also a spacer 11 9 455 for N73 only) to vibration damper hub and to oil sump (A/C compressor tensioner).

Fig 1: Installing Special Tool To Vibration Damper Hub

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

Check vibration damper hub and radial seal, replace if necessary.

Align groove in vibration damper hub to parallel key and install vibration damper hub.

Replace central screw (1).

Fit special tool 11 3 460 on special tool 11 9 451.

Special tool 11 3 460 is magnetic.

Fig 2: Assembling Protractor On Special Tool

Courtesy of BMW OF NORTH AMERICA, INC.

Secure special tool 11 9 453 with clamping screw on special tool 11 3 454 (socket).

Adjust 0° position.

Tightening torque, refer to 11 23 2AZ in ENGINE - TIGHTENING TORQUES .

Fig 3: Tightening Vibration Damper/Hub To Crankshaft

Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.