S2000 Under The Hood S2000 Technical and Mechanical discussions.

Clutch Master Cylinder Replacement

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Old 11-18-2011, 11:59 AM
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Default Clutch Master Cylinder Replacement

Hey All, the CMC on my 2002 is leaking.

Since the stock unit failed with less than 60k mi on it was wondering what to replace it with?

Is there an inherit flaw in the stock units and is there a better after market choice?

Thanks
Old 11-18-2011, 12:14 PM
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It seemed that many of the early units had a tendency to leak. I put another OEM part in several years ago and it is leak free so maybe QC improved.
Old 11-18-2011, 12:26 PM
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I replaced mine with an OEM unit and it worked flawlessly with no leaks.
Old 11-18-2011, 12:34 PM
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Thats what happens when a car is 10 years old! Get another oem part and it will last another 10 years
Old 11-18-2011, 12:36 PM
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^^ i just noticed what the guy above me said and now i see your car year.

with the cmc, don't look at the mileage, look at how old the it is.
Old 11-18-2011, 02:53 PM
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How did it fail? I'm wondering, since there have been several of us recently that had low clutch fluid but no visible leaks, which would suggest a slow leak in the slave cylinder. Did you find dripping below the Master Cylinder?
Old 11-19-2011, 08:57 AM
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As many have suggested, based on experience: change the fluid first.
Old, crappy, chunky fluid causes leaks.
If it still leaks with fresh fluid you could:
#1 - Buy a new one.
#2 - open up the old one and clean the seals, reinstall with fresh fluid - it may be what you need.

Okay.. if cleaing doesn't help you have to to the remove-install twice, but that's fun to do.. right?

Old 11-20-2011, 05:02 AM
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@slalom44 -look inside the car, the back of the master cyl where the pedal pushes the pistin(inside the car) will show you if it is leaking.. I just replaced mine and did the slave at the same time.
Old 11-22-2011, 05:58 AM
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Originally Posted by slalom44
How did it fail? I'm wondering, since there have been several of us recently that had low clutch fluid but no visible leaks, which would suggest a slow leak in the slave cylinder. Did you find dripping below the Master Cylinder?


Leaking above the clutch pedal - ya can see the fluid leaking around the rod...
Old 11-22-2011, 06:27 AM
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Just found out my 2006 with 16500 miles has a leak! Gotta get it replaced too...


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