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

WARNING: This page does not describe the selected car, but rather 16 other vehicles, including the 2006 BMW 330Ci, 2005 BMW 330xi, 2005 BMW 330i, 2005 BMW 330Ci, and 2004 BMW 330xi. However, it is still accessible from the selected car via links, so may be relevant.

IMPORTANT: Spring pressure!

Unfasten cylinder for chain tensioning piston.

Installation:

Replace sealing ring.

Tightening torque. Refer to ENGINE - TIGHTENING TORQUES - 3-SERIES (E46) .

Fig 1: Replacing Sealing Ring

Courtesy of BMW OF NORTH AMERICA, INC.

Arrangement of components:

Cylinder for chain tensioning piston
Sealing ring
Spring
Piston

Fig 2: Identifying Arrangement Of Components
Courtesy of BMW OF NORTH AMERICA, INC.