37 20 001 Removing and installing/replacing DYNAMIC DRIVE valve block

WARNING: This page is about a different car, the 2005 BMW 645Ci and 2004 BMW 645Ci. However, it is still accessible from the selected car via links, so may be relevant.

IMPORTANT: Adhere to the utmost cleanliness. Do not allow any dirt to enter the hydraulic system.

Seal off pipe connections with plugs.

NOTE: In a warranty case you must always provide a fault memory printout, even where there is no fault memory entry, with the defective part.

Necessary preliminary tasks:

Draw off and dispose off hydraulic fluid from fluid reservoir
Remove bottom right wheel arch trim
Partially remove right underbody paneling

Fig 1: Releasing Nuts

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Release nuts (1, 2) (pressure lines to rear axle oscillating motor).

Tightening torque 35 N.m.

Release nut (3) (return line)

Tightening torque 40 N.m.

Release nut (4) (pressure line)

Tightening torque 35 N.m.

Release nuts (5, 6) (pressure lines to front axle oscillating motor).

Tightening torque 35 N.m.

Installation:

Make sure hydraulic lines are laid without tension and with sufficient spacing to adjoining components.

Partially detach front right wheel arch trim.

Disconnect plug connections (1, 2).

Remove grounding strap from valve block. Release screws (3).

Fig 2: Disconnecting Plug Connections

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Tightening torque 8 N.m.

Raise valve block and remove towards front.

Disconnect all plug connections (1) on valve block.

Fig 3: Disconnecting Valve Block Plug Connections

Courtesy of BMW OF NORTH AMERICA, INC.

Unclip wiring set from valve block.

After installation:

Fill and bleed hydraulic system, refer to 32 13 006 BLEEDING POWER STEERING UNIT .
Check pipe connections for leaks
If necessary, carry out initial Dynamic Drive operation, refer to 37 10 001 INITIAL OPERATION WITH TEST RUN OF DYNAMIC DRIVE .