What tool and size is needed for undoing the star shaped socket on the top of this? It looks like it might be a "Triple Square" / XZN drive about 20mm. I would also appreciate any suggestions about where to get one in the UK please.
Your slave looks a lot like the one on my '05 ST3. What did you use to turn the torx pattern bolt? Hope the rebuild lasts a good long time for you.Stick and Stryder
I think you are both looking at completely different slave cylinder types to mine. I've got it apart now and replaced the seals.