Variable Valve Timing Solenoid: Service and Repair

11 36 655 Removing And Installing/Replacing Both Solenoid Valves (N55)







IMPORTANT:
It is essential to observe conditions of absolute cleanliness when removing and installing the inlet and exhaust solenoid valves.
Possible malfunction if valves are contaminated:
- Rough running
- OBD fault entry
- Exhaust emission behavior.
- Low engine power







Necessary preliminary work:
- Remove ignition coil cover







Disconnect plug connection (1) on inlet solenoid valve.
Disconnect plug connection (2) on exhaust solenoid valve.







Release screw (2).
Remove inlet solenoid valve (1) with holder towards front.
Release screw (3).
Remove exhaust solenoid valve (4) with holder approx. 10 mm towards front.
Tightening torque 11 36 3AZ.







Turn exhaust solenoid valve (1) approx. 90° in direction of arrow until exhaust solenoid valve (1) can be removed from the front on engine wiring harness.







Remove O-ring (2).
Remove support ring (1).

Installation:
Replace support and O-rings.







Assemble engine.
Check function of DME.