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Engine Block: Flywheel

The lightweight flywheel is made from a laminated plate. The starter ring gear is also the increment wheel for engine speed and crankshaft positioning/misfire detection.

The ring gear is riveted directly to the flexplate (6). The flywheel diameter is 320 mm.

Fig 1: Identifying Flywheel
G03390312Courtesy of BMW OF NORTH AMERICA, INC.