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

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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.

Fig 1: Identifying Plug Connections On Inlet And Exhaust Solenoid Valves

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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 .

Fig 2: Identifying 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: Removing 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-Ring

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Assemble engine.

Check function of DME.