11 31 094 Removing Hydraulic Chain Tensioner For Timing Chains on Left Side

11 31 094 Removing hydraulic chain tensioner for timing chains on left side (N74)

Special tools required:





Warning!
Chain tensioner is pre-tensioned.
Release lock pin only in installed state.
Risk of injury!

Important!
Risk of damage!





The engine must not be cranked when the chain tensioner is removed.
The timing chain may jump.





Necessary preliminary tasks:
^ Remove timing case cover at top left





Crank engine back at central bolt (1) against direction of engine rotation by approx. 90°.





Important!
The timing chain on the chain tensioner becomes the tight end on cranking back.

Do not crank engine without chain tensioner or special tool 11 9 900.

Piston (1) of chain tensioner must be pressed in against oil pressure in housing (see arrow).

Note:
Graphics show N63.





Position special tool 11 4 120 or 3.5 mm drill in drill hole.

Warning!
Piston of chain tensioner is now secured.

Release screws (1).

Tightening torque 11 31 7AZ.

Remove chain tensioner (2).





Important!
Risk of injury!
Chain tensioner is pre-tensioned.

Chain tensioner arrangement:
^ Piston
^ Expansion element
^ Compression spring
^ Housing

Installation:





Replace all gaskets and sealing rings.

Assemble engine.