11 31 090 Installing And Removing/Replacing Chain TENSIONER Piston (N12)

WARNING: This page is about a different car, the 2008 MINI Cooper and 2007 MINI Cooper. However, it is still accessible from the selected car via links, so may be relevant.

Necessary preliminary tasks:

Remove throttle valves.

Release chain tensioner (1).

Tightening torque: See ENGINE - TIGHTENING TORQUES .

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.

If the chain tensioner is reused, its oil chamber must be drained. Place chain tensioner on a level working surface and slowly compress.

Repeat procedure twice.

Fig 2: Placing Chain Tensioner On Level Working Surface

Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.