11 36 655 Removing and installing/replacing both solenoid valves (N55)

IMPORTANT: On removing and installing the VANOS solenoid valve (intake) and VANOS solenoid valve (exhaust), adhere to conditions of absolute cleanliness.
Possible malfunction if there is dirt contamination in the valves:

Irregular operation
OBD fault entry
Exhaust gas emission characteristics.
Low engine performance

Necessary preliminary tasks:

Remove ignition coil cover. See 11 12 040 REMOVING AND INSTALLING ALL IGNITION COILS AND INJECTOR WELLS (N55) .

Disconnect plug connection (1) on VANOS intake solenoid valve.

Disconnect plug connection (2) on VANOS exhaust solenoid valve.

Fig 1: Identifying Plug Connections On VANOS Intake And Exhaust Solenoid Valve

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Release screw (2).

Remove VANOS intake solenoid valve (1) with holder towards the front.

Release screw (3).

Move VANOS exhaust solenoid valve (4) with holder approx. 10 millimeters towards the front

Tightening torque 11 36 3AZ .

Fig 2: Identifying Screw And VANOS Solenoid Valve

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

Fig 3: Turning VANOS Exhaust Solenoid Valve

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Remove O-ring (2).

Remove support ring (1).

Installation note:

Replace support and O-rings.

Fig 4: Identifying O-Ring And Support Ring

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Assemble engine.

Check function of Digital Engine Electronics.