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Old 08-26-2013, 11:29 AM   #260 (permalink)
Jsolo
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Join Date: Dec 2011
Location: chicago
Posts: 783
Drives: '12 G37 6MT
Rep Power: 14
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Clutch failures with no visible fluid leaks usually involve failure of the master cylinder. Rather than pressuring the fluid in the MC/hydraulic line, the MC piston is simply moving back and forth with fluid leaking past the seals in the MC bore. You can call this an internal leak. Level in the reservoir would not change.

So technically it's not a CSC failure and a hell of alot cheaper to replace. However the symptoms are the same --- no clutch pedal [pressure].
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