11 31 090 Removing and installing/replacing the chain tensioner (B48, B46)

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2019 MINI Cooper, 2018 MINI Cooper, 2017 MINI Cooper, 2016 MINI Cooper, and 2015 MINI Cooper. However, it is still accessible from the selected car via links, so may be relevant.

Necessary preliminary tasks:

Remove CATALYTIC CONVERTER

Removal:

Release chain tensioner (1).

Attention !

Have a cleaning cloth ready. A small quantity of engine oil will escape after the screw connection has been released.

Fig 1: Chain Tensioner

G11645133

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

If the chain tensioner is reused, its oil chamber must be drained.

Place chain tensioner on a level support and slowly compress.

Repeat process twice.

Fig 2: Compressing Chain Tensioner

G11645134

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: Replace sealing ring (1).

Fig 3: Sealing Ring

G11645135

Courtesy of BMW OF NORTH AMERICA, INC.

Release chain tensioner (1).

Tightening torque 11 12 5AZ .

Fig 4: Chain Tensioner

G11645133

Courtesy of BMW OF NORTH AMERICA, INC.