23 42 604 Replace all switch valves (GS7S47BG SMG)

WARNING: This page is about a different car, the 2010 BMW M5, 2009 BMW M5, 2008 BMW M5, 2007 BMW M5, and 2006 BMW M5. However, it is still accessible from the selected car via links, so may be relevant.

IMPORTANT:

It is essential to adhere to conditions of absolute cleanliness.

Any dirty parts must be cleaned before the switch valves are loosened.

After completion of work, check HYDRAULIC OIL LEVEL .

Use only the approved hydraulic fluid: Pentosin CHF11S (BMW part number 81 22 9 407 758, 1-litre can)

Failure to comply will result in serious damage to the hydraulic unit.

Bleed the actuator block.

Reduce pressure in hydraulic system by means of BMW Diagnosis System (Replacement and Repair)
Remove TRANSMISSION

Cut open cable strap (1).

Unfasten screws (2).

Remove cover (3).

Installation note:

Use high-temperature-resistant cable ties (approx. 140 °).

Fig 1: Identifying Cable Strap, Screws, And Cover

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Disconnect connectors (1).

Fig 2: Identifying Connectors

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The switch valves 1-4 may only be removed and installed individually in direction of travel from right to left.

Always loosen only the screw (1) to the right next to the valve of the actuator block to be removed.

Presentation: Switch valve 1.

Tightening torque: 22 Nm

Fig 3: Identifying Screw And Switch Valves

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Release screws (1).

Presentation: Switch valve 1

Tightening torque: 2.9 Nm

Installation note:

Replace screws.

Fig 4: Identifying Screws

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Pull the switch valve (1) out of the actuator block.

Presentation: Switch valve 1.

NOTE: The removal of the valve requires increased effort.

Fig 5: Pulling Switch Valve Out Of Actuator Block

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IMPORTANT: Observe the presence of the sealing rings (1) after removing the shift valve.

Installation note:

Prior to installing the shift valve, moisten the sealing rings with hydraulic fluid (Pentosin CHF11S, BMW part number 81 22 9 407 758, 1-litre can).

Fig 6: Identifying Sealing Rings On Shift Valve

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Installation note:

Replace sealing ring (1).

Prior to installation, moisten the sealing rings with hydraulic fluid (Pentosin CHF11S, BMW part number 81 22 9 407 758, 1-litre can).

When installing the switch valve, the sealing ring (1) may not be moved or damaged.

Check the correct position again before tightening the valve.

Fig 7: Identifying Sealing Ring

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Insert the switch valve (1) as far as possible and tighten with the valve screws.

Tightening torque: 2.9 Nm

Fig 8: Inserting Switch Valve 1

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Insert screw (1) and tighten down.

Presentation: Switch valve 1.

Tightening torque: 22 Nm

IMPORTANT: The switch valve 2-4 must be removed and installed analogous with switch valve 1.

Fig 9: Identifying Screw And Switch Valves

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