Replacing Valve Block GS6S53BZ (SMG)

WARNING: This page is about a different car, the 2005 BMW 645Ci, 2005 BMW 545i, 2004 BMW 645Ci, and 2004 BMW 545i. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Numbers in text refer to numbers in figure.

CAUTION: Before working on hydraulic system: reduce pressure in hydraulic system by means of service function in DIS Tester. Disconnect hydraulic pump relay in electronics box. DO NOT reconnect relay for entire duration of repair work.

NOTE: After completing work: check fluid level in hydraulic system by means of DIS Tester "Service Function". Perform "Teach in transmission" service function by means of DIS Tester.

Remove underbody protection. Remove heat shield.

Release screws (1) and remove protective plate. See Figure . Upon installation, tighten screws to specification. See TORQUE SPECIFICATIONS .

Loosen screws (1). See Figure . Release pressure accumulator (2) at hexagon head (3). Upon installation, tighten fasteners to specification. See TORQUE SPECIFICATIONS .

Installation: replace sealing ring (1). See Figure . Pay attention to installation position of sealing ring.

Release stud bolt (1). See Fig 1 . Lift out expansion tank in direction of arrow from valve block. Upon installation, tighten bolt to specification. See TORQUE SPECIFICATIONS .

Fig 1: Removing Expansion Tank From Valve Block

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NOTE: Plugs of solenoid valves must not be mixed up.

Pull off plug (1). See Fig 2 .

Fig 2: Pulling Off Plug

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Unlock and disconnect lines (1) and (2). See Fig 3 and Fig 4 . Upon installation, replace sealing rings.

Fig 3: Disconnecting Lines

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Fig 4: Locating Lines

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Remove screws (1) and (2). See Figure . Remove valve block. Upon installation, tighten screws to specification. See TORQUE SPECIFICATIONS .