Remove/Install Camshaft Adjuster

Removing and installing camshaft adjuster






Tightening torques in Nm or tightening angle






Special tools






Removing






1. Position piston of cylinder 1 to ignition TDC.
2. Remove front cover at top, refer to Timing Components - Timing Cover - Service and Repair - Procedures Service and Repair






3. Mark timing chain relative to exhaust and inlet camshaft sprockets (arrows).






4. Unscrew bolt (3); counter-hold armature (4) at flat (arrow) for this step. Pull off armature (4).
5. Unscrew nut (6), take off cover with ring (12).






Engine 104.98

6. Remove guide sprocket (1) together with bearing journal (2).

Caution: Left-hand thread!

Mark guide sprocket on front before removing so that the direction of rotation is maintained when reinstalling.






Engine 104.99

7. Unbolt camshaft sprocket of exhaust camshaft.
8. Take off camshaft sprocket (13) and positioning piston (14). Unscrew bolts (15 and 15a) and take flanged shaft (16) of inlet camshaft (22).

Installing

9. Fit flanged shaft (16) onto camshaft (22). Pay aftention to locating pin (21), screw on.

Caution: Matching of securing bolt of flanged shaft to camshaft flange, refer to Camshaft, Lifters and Pushrods - Camshaft Gear/Socket - Service and Repair - Procedures Service and Repair.






10. Fit positioning piston (14) onto flanged shaft (16) into specified position, turning to the left; hold up timing chain when performing this step.






11. Fit camshaft sprocket (13) onto positioning piston (14) in specified position, turning to the right; hold up timing chain when performing this step.






12. Fit on cover with ring (12) and screw on nut (6), but do not tighten finally at this stage.
13. Engine 104.99: install camshaft sprocket of exhaust camshaft.
For tightening torques, refer to Camshaft, Lifters and Pushrods - Camshaft Gear/Socket - Service and Repair - Procedures Service and Repair.






14. Fit timing chain onto both camshaft sprockets, pay attention to markings.






Engine 104.98

15. Insert guide sprocket (1) together with bearing journal (2) and bolt (3), screw on.
Tightening torque 35 Nm.

Caution: The timing chain must be fitted on centrally on the tensioning rail.
Bolt (3) of guide pulley "left-hand thread".






16. Tighten nut (6) on camshaft adjuster.
Tightening torque 65 Nm.
17. Fit armature (4) onto control plunger (18).
Tighten bolt (3).
Tightening torque (see table).
The roll pin (arrow) in the armature (4) must be aligned with the flat face on the control plunger (18).

18. Install front cover at top, refer to Timing Components - Timing Cover - Service and Repair - Procedures Service and Repair.