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

IMPORTANT: It is essential to observe conditions of absolute cleanliness when removing and installing the intake 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 intake solenoid valve.

Disconnect plug connection (2) on exhaust solenoid valve.

Fig 1: Identifying Connectors For Intake/Exhaust Solenoid Valves

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Release screw (2).

Remove intake 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 .

Fig 2: Identifying Intake/Exhaust Solenoid Valves And Screws

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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.

Fig 3: Turning Exhaust Solenoid Valve

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Remove O-ring (2).

Remove support ring (1).

Installation:

Replace support and O-rings.

Fig 4: Identifying Support Ring And O-Rings

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Assemble engine.

Check function of DME.