Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

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HOMESERVICE MANUALSBMW2011128I 2D CONVERTIBLE, N51, STANDARDREPAIR AND DIAGNOSISENGINE PERFORMANCEENGINE CONTROL SYSTEMSENGINE - REPAIR (N51)CRANKSHAFT WITH BEARING11 22 500 REMOVING AND INSTALLING OR REPLACING FLYWHEEL (N51)

2011 BMW 128i 2D Convertible, N51, Standard

11 22 500 Removing And Installing Or Replacing Flywheel (N51)

2011 BMW 128i 2D Convertible, N51, StandardSECTION 11 22 500 Removing And Installing Or Replacing Flywheel (N51)

Special tools required:

For the following special tools, refer to ENGINE - SPECIAL TOOLS (N51) .

11 4 180
11 9 260
11 9 265

IMPORTANT: Aluminum-magnesium materials. No steel screws/bolts may be used due to the threat of electrochemical corrosion. A magnesium crankcase requires aluminum screws/bolts exclusively. Aluminum screws/bolts must be replaced each time they are released . Aluminum screws/bolts are permitted with and without color coding (blue). For reliable identification: Aluminum screws/bolts are not magnetic . Jointing torque and angle of rotation must be observed without fail (risk of damage) .

Necessary preliminary tasks:

Remove transmission . See 23 00 017 REMOVING AND INSTALLING TRANSMISSION (GS6-17BZ) N51/N52/N52K/N53 or 24 00 032 REMOVING AND INSTALLING AUTOMATIC TRANSMISSION (GA6L45R) .
Remove clutch . See 11 22 500 REMOVING AND INSTALLING OR REPLACING FLYWHEEL (N51) .

Block flywheel (1) with special tool 11 9 260, use an old transmission screw for this purpose. See Fig 1.

Installation:

Replace aluminum screws .

Unfasten flywheel screws.

Tightening torque. See 11 22 1AZ in 11 22 FLYWHEEL .

Fig 1: Identifying Flywheel With Special Tools

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

Flywheel (1) is secured with an alignment pin.

Fit new flywheel screws.

Clean crankshaft thread for flywheel screws.

Secure flywheel with an old transmission screw (1) and special tools 11 9 260 and 11 9 265. See Fig 2.

Installation:

Replace aluminum screws .

Release flywheel screws with special tool 11 4 180. See Fig 2.

Fig 2: Identifying Transmission Screw And Special Tools

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

Flywheel is secured with a dowel pin.

Fit new flywheel screws.

Tightening torque. See 11 22 2AZ in 11 22 FLYWHEEL .

Assemble engine.

RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.