11 31 090 Removing and installing/replacing chain tensioning piston (M52 / M52TU / M54 / M56)

Unfasten cylinder for chain tensioning piston.

Fig 1: Unfastening Cylinder For Chain Tensioning Piston

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Installation: 

Replace sealing ring.

Tightening torque 11 31 8AZ. Refer to ENGINE - TIGHTENING TORQUES .

Fig 2: Arrangement Of Components

Courtesy of BMW OF NORTH AMERICA, INC.