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Home >> BMW >> 2015 >> Z4 sDrive28i, Automatic Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 1467 (Engine - Camshafts, Accessory Drive Belt & TENSIONER - Repair) >> Accessory Drive Belt And TENSIONER >> S63 Engine >> 11 28 020 Replacing tensioning device for alternator drive belt (S63)

11 28 020 Replacing tensioning device for alternator drive belt (S63)

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Special tools required: 

Necessary preliminary tasks: 

If necessary, remove special tool 11 0 390 .

Release screw (1).

Tightening torque 11 28 1AZ .

Remove belt tensioner with idler pulley (2).

Fig 1: Identifying Idler Pulley And Screw
G09920824Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.