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E39 (1995-2003) E34 (1988-1996) E28 (1981-1988) E12 (1972-1981)
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  • Bleeding the hydraulic clutch drive

Bleeding the hydraulic clutch drive (BMW 5 Series E34)

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Bleeding the hydraulic clutch drive should be done if the pressed clutch pedal does not return or returns slowly to its original position, gears are difficult to engage, or if the hydraulic system has opened.

Since the hydraulic clutch drive operates on brake fluid, before carrying out work, you should read the section "Bleeding the brake system".

With this method of bleeding, some air may remain in the system. This is recognized by a grinding noise and incomplete release of the clutch. Therefore, it is necessary to bleed the air at a service station.

Raise the front of the car.

Check the brake fluid level in the expansion tank of the hydraulic clutch drive and, if necessary, top up the fluid to the MAX mark.

Remove the cap from the air release valve on the clutch slave cylinder and from the air release valve of the front left wheel brake caliper.

Carefully ensure that the air release valves can be turned easily.

Attach the transparent hose to the air bleed valve of the front left brake caliper.

Fill the transparent hose with brake fluid. To do this, open the air bleed valve of the front left brake caliper. Have an assistant press the brake pedal and hold it down. Close the air bleed valve and release the brake pedal. Then open the air bleed valve again and press the brake pedal again. Repeat this process until the transparent hose is completely filled with brake fluid. Close the free end of the hose with your finger so that the brake fluid does not leak out.

Attention: The brake fluid level should not drop too much; add fresh brake fluid if necessary.




Place the free end of the clear hose onto the clutch slave cylinder air bleed valve and open both air bleed valves.

Press the brake pedal. Close the air release valve and release the brake pedal. Repeat this process until air bubbles stop coming out of the expansion tank. Constantly add fresh brake fluid.

Close the air bleed valves on the clutch slave cylinder and brake caliper. Remove the transparent hose and put on the dust caps.

Lower the car.

Add brake fluid to the expansion tank up to the MAX mark.

Check the functioning of the clutch and brake system.

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Article verified: Polikarpov Saveliy

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БМВ E34: Clutch
Next articles

Removal and installation, clutch check
Clutch — general information and device
Removal air using a special installation
Removal and installation the release bearing
Removal and installation the clutch slave cylinder
Diagnosing Clutch Faults


Similar articles on other types of BMW cars:
Bleeding the clutch hydraulic drive BMW 3 Series E21 (1975-1983)
Bleeding the hydraulic clutch drive BMW 3 Series E30 (1982-1994)
Bleeding the Clutch Hydraulic System BMW 7 Series E32 (1986-1994)
Removal and installation the fan drive clutch BMW 7 Series E38 (1994-2001)
Bleeding the clutch hydraulic drive BMW X3 E83 (2003-2010)
Bleeding the hydraulic clutch drive BMW X5 E53 (1999-2006)
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BMW E39 (1995-2003) 
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