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Replacing A Clutch Master Cylinder On A Brera/Spider and 159

The clutch master cylinder is way down under the drivers foot well, not an easy place to work or take pictures in and to bleed the system you need to remove the battery tray. This 'How To' is based on a right hand drive 159 2.4 MJET. Part 55200754

Most commonly it's just the body of the clutch master cylinder that needs replacing so to make fitment easier we're just going to use that part. Pull up the retaining clip to the outlet pipe....

....and disconnect it....

....then pull off the inlet hose at the far end.

In the drivers foot well at the back of the clutch pedal undo the x2 10mm mounting bolts/nuts.

Pop off the top of the push rod from the peg to the clutch pedal.

Disconnect the x2 hoses at the same points (there will be a little leakage) and refit the new unit.

Disconnect the Negative terminal.

Release the branch control unit cover.

Unclip the electrical connector....

....and unscrew the x2 Philips mounting screws.

Undo the 10mm nut on the Positive terminal and disconnect.

The battery may still be wrapped in an insulating blanket which is just velcroed together. There's two kind of securing straps, this model would have a material one connected to metal side braces...

...that just needs the 13mm nut undoing on one side. The other option is a metal bar with x2 bolts to the top braces.

Remove the battery.

Undo the x3 13mm bolts to the battery tray.

The x2 10mm bolts to the ECU support bracket....

....and separate.

You can now access the bleed nipple to the clutch concentric slave cylinder.

Attach a clear tube and an 11mm ratchet spanner.

Run the tube into an appropriate waste container. If you are doing this on your own undo the bleed nipple a few small turns then press the clutch pedal down to the floor, return to the bleed nipple, close it then manually lift the clutch pedal to it's starting point. Do this a few times until no air is seen in the fluid bleeding from the slave cylinder.

keep an eye on the level of the clutch fluid and top up in between as necessary. Pump the pedal a few times and if it doesn't go firm bleed a little more until it does.

Related Links: Fault Diagnosis Guide | Fixed price servicing

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