11 31 090 Removing And Installing/Replacing Chain Tensioning Piston (S54)
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2006 BMW M3, 2005 BMW M3, 2004 BMW M3, 2003 BMW M3, and 2002 BMW M3. However, it is still accessible from the selected car via links, so may be relevant.
E46 Only:
Remove expansion rivet. Remove air duct (1).
CAUTION:
Strong spring force. Have a cleaning cloth ready. A small quantity of oil will emerge after the screw connection has been released. Make sure no oil runs onto belt drive. Remove any remnants of oil immediately with cleaning cloth.
Unfasten screw connection.
Remove chain tensioning piston. Refer to 11 31 090 REMOVING AND INSTALLING/REPLACING CHAIN TENSIONING PISTON (S54) .
Installation:
If a chain tensioner is reused, its oil chamber must be drained.
Place chain tensioner on a level surface and compress slowly and carefully.
Repeat this procedure twice.
Installation:
Install hydraulic chain tensioner (1) in cylinder for chain tensioning piston (2).
Replace sealing ring (3).
Install and tighten down cylinder for chain tensioning piston (2).
Tightening torque, refer to 11 31 8AZ in ENGINE - TIGHTENING TORQUES .