replacing clutch slave cylinder

16bit · Postby **16bit** » Tue Sep 03, 2013 11:16 am

so my clutch slave cylinder finally went last night.

usual symptoms of clutch going to the floor, a little pumping managed to get it to work a bit but it was flocked.

I pulled over and the reservoir was almost empty so i went to the closest servo and got some brake fluid to top it up.

I managed to get home ok in the end.

however my question is should i replace the slave cylinder and rebuild the master cylinder at the same time?

I figure its worth if i am getting into it anyway.

emily_mx5 · Postby **emily_mx5** » Tue Sep 03, 2013 11:20 am

I replaced slave and master at the same time, as I have heard the pressure of a new master is enough to blow the old slave and vice versa.

The master is a bitch to do lol

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16bit · Postby **16bit** » Tue Sep 03, 2013 11:31 am

typical, the instructions i found make it seem easy enough but thats never the case is it!

should i do one before the other or just replace them both then bleed it?

Magpie · Postby **Magpie** » Tue Sep 03, 2013 11:33 am

PM CaptainNatefor info on slave then master issues.

The issue now could be that the master had a whole pile of gunk at the bottom and when you added more fluid it flused/forced the gunk into the seal/piston area now hence yes a rebuild on the master would be on the cards or even a replacement. Good luck.

If doing both make sure you flush/blow the lines out before refitting them as there maybe some rubbish in them.

Pamex · Postby **Pamex** » Tue Sep 03, 2013 11:34 am

I'd start just with the slave. When you're bleeding it, pump gently so the seals don't pop.

16bit · Postby **16bit** » Tue Sep 03, 2013 11:39 am

hmmm, i might bleed the system first before replacing the bits to get rid of all the gunk then.

93_Clubman · Postby **93_Clubman** » Tue Sep 03, 2013 12:16 pm

As Pam says do slave first & worth flushing initially as you suggest. Replaced the original slave cylinder in my '93 NA8 in 2005 - master cylinder is still the original.

16bit · Postby **16bit** » Tue Sep 03, 2013 12:21 pm

great so flush, replace slave, rebuild master, flush again.

aka_juffa · Postby **aka_juffa** » Tue Sep 03, 2013 6:05 pm

I recently bought a slave cylinder rebuild kit from MX5parts.co.uk Didn't fix the problem. Bought an aftermarket slave cylinder, still didn't fix the problem (although somewhat better now). I have a new master coming from the UK as I type this post. So far I have gone through almost 2 bottles of brake fluid...

Good luck.

J.