Replacing Expansion Tank GS6S37BZ (SMG)

WARNING: This page does not describe the selected car, but rather 22 other vehicles, including the 2006 BMW 330Ci, 2006 BMW 325Ci, 2005 BMW 330i, 2005 BMW 330Ci, and 2005 BMW 325i. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Numbers in text refer to numbers in figures.

NOTE: 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. 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.

Release nuts and remove heat shield (1). See Fig 1 . Upon installation, tighten to specification. See TORQUE SPECIFICATIONS .

Fig 1: Removing Heat Shield

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Unscrew bolt (1). See Fig 2 . Upon installation, make sure retainer (2) for heat shield is correctly positioned. Tighten bolt to specification. See TORQUE SPECIFICATIONS .

Fig 2: Locating Bolt

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Release stud bolt (1) and screw (2). See Fig 3 . Remove expansion tank in direction of arrow. Upon installation, replace both sealing rings. Grease sealing rings. Tighten fasteners to specification. See TORQUE SPECIFICATIONS .

Fig 3: Removing Expansion Tank From Valve Block

Courtesy of BMW OF NORTH AMERICA, INC.