Timing Chain Tensioner: Service and Repair

11 31 090 Installing And Removing/Replacing Chain Tensioner Piston (N55)







Necessary preliminary tasks:
- Remove air duct







Release chain tensioner (1).
Tightening torque 11 31 7AZ.

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

Installation note:
Replace sealing ring.







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.







Assemble engine.