11 31 090 Installing and removing/replacing chain tensioner piston (N12)

WARNING: This page is about a different variant/trim than selected.

Necessary preliminary tasks:

Remove throttle valves. See REMOVING AND INSTALLING/SEALING THROTTLE VALVE ASSEMBLY .

Release chain tensioner (1).

Tightening torque 11 31 4AZ

IMPORTANT: Have a cleaning cloth ready. A small quantity of engine oil will emerge after the screw connection has been released.
Make sure no oil runs onto the belt drive.

Installation:

Replace sealing ring.

Fig 1: Identifying Chain Tensioner

Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.