11 36 655 Removing and installing/replacing both solenoid valves (N54, N54T)

WARNING: This page is about a different car, the 2013 BMW Z4, 2012 BMW Z4, 2011 BMW Z4, 2010 BMW Z4, and 2009 BMW Z4. However, it is still accessible from the selected car via links, so may be relevant.

IMPORTANT: Always check that the solenoid valves are clean during removal and installation.

Possible malfunctions if valves are contaminated:

Rough running
OBD incorrect entry
Poor exhaust gas values
Low engine power

IMPORTANT: Risk of damage!

Do not clean solenoid valves with compressed air.

Necessary preliminary tasks

Read out fault memory in DME control unit
Switch off ignition
Remove FAN COWL

NOTE: Carefully press coolant hose and pressure line (not shown) to one side.

NOTE: Solenoid valve (2) controls the intake adjuster.

Solenoid valve (3) controls the exhaust adjuster.

Disconnect plug connections (1 and 4).

Installation note:

Do not mix up plug connections (1 and 4) of solenoid valves.

Fig 1: Identifying Solenoid Valve Plug Connections

Courtesy of BMW OF NORTH AMERICA, INC.

Plug connections (1 and 4) must snap audibly into place!

Unfasten screws (3 and 4).

Tightening torque 11 36 3AZ .

Carefully pull out solenoid valves (1 and 2).

Fig 2: Identifying Solenoid Valves

Courtesy of BMW OF NORTH AMERICA, INC.

Installation note:

Replace sealing ring (1) on solenoid valve (2).

NOTE: Moisten sealing ring (1) with engine oil.

Avoid damaging, e.g. notches or scratches, the solenoid valve (2).

Fig 3: Identifying Sealing Ring On Solenoid Valve

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT: Risk of damage!

Do not tilt solenoid valves (1 and 2) when inserting into cylinder head.

Carefully insert solenoid valves (1 and 2) up to stop.

Ensure correct installation position.

Insert screws (3 and 4) and tighten down.

Tightening torque 11 36 3AZ .

Fig 4: Identifying Solenoid Valves

Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.

Delete fault memory.

Check function of DME control unit.