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Home >> BMW >> 2011 >> Alpina B7 >> Repair and Diagnosis >> Engine Mechanical >> Blowers, Superchargers & Turbochargers >> Engine - Repair - F01/F02 >> 1128 V-Ribbed Belt W.Tens./Deflect >> 1128050 Replacing A/C compressor drive belt with belt tensioner (N63) >> Observe direction of engine rotation

Observe direction of engine rotation

Crank engine at central bolt until marking (see arrow) is reached on vibration absorber.

Release screws (1).

Tightening torque 11 28 2AZ .

Fig 1: Identifying Crank Pulley Screws And Marking
G06888580Courtesy of BMW OF NORTH AMERICA, INC.
IMPORTANT: Belt pulley is pretensioned.
Belt pulley tension is relieved abruptly during the cranking process! 
NOTE: Crank engine at central bolt until marking (see arrow) is reached on vibration absorber.
Remove elasto-belt.


Fig 1: Identifying Marking Reached On Vibration Absorber
G06888581Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.