Variable Valve Timing Solenoid: Service and Repair

11 36 655 Removing and installing/replacing both solenoid valves (N12)





Important!
Always check that the solenoid valves are clean during removal and installation.
Possible malfunction if valves are contaminated:
^ Rough running.
^ OBD fault entry.
^ Exhaust emission behavior.
^ Low engine power.





Necessary preliminary tasks:
^ Remove acoustic cover





Disconnect plug connection for solenoid valve (3) - inlet.

Release screw (1).

Remove solenoid valve (2) for inlet side.





Disconnect plug connection for solenoid valve - exhaust.

Release screw (2).

Important!
Do not use a tool to lever out solenoid valve (1).
A tight fit in the solenoid valve and deformation caused by incorrect removal will result in solenoid valve failure.

Remove solenoid valve (1) for exhaust side.





Installation:
Replace sealing rings on solenoid valves.





Assemble engine.

Check function of DME.