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My '87 9000 turbo has been in the garage for the last two weeks due to a problem with the clutch. It gave out and was really spongy and I was unable to shift gears. I removed the master cylinder today and replaced the seals inside it after disassembly. This was relatively easy and the seals were ~$15 (w/ shipping, should have ordered more than a couple of gaskets I guess) from Andrew's of Princeton. Strangely enough there I finished the rebuild with an extra washer and rubber cap.
People complain about bleeding the clutch, and while it took a few days to understand how to go about it, the double inner tube approach was really elegant. No pumping was required once the tube was inflated and I was able to completely flush the clutch hydraulics. I was amazed by how nasty the old fluid was that came out of the bleed valve on the slave cylinder. I ran fresh fluid through the system until it came out of the bleed valve clean, without particles or air bubbles.
Right after I finished I drive the car around the block. Initially I was thrilled by the strong feel of the "new" clutch, but after going three or four blocks (6-8 shifts) the clutch started to feel spongy again.
Now the I assume the hydraulic lines are clear and there's fresh fluid in the reservior. The master isn't leaking and the fluid went down (~1.5 cm) in the reservior in the short neighborhood drive. I thus believe the slave cylinder to be at fault. Does this diagnosis seem correct? If so I'd much rather replace the slave seals than buy a whole new slave cylinder for the clutch. Has anyone done this or am I safer off just buying a new part?
thanks in advance!
NT Moore
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