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Mechanical Maintenance (Oil, Fluids, Break-In, Servicing) Everything related to the mechanical maintenance of the FR-S and BRZ


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Old 01-31-2019, 06:48 PM   #1
YamahaR86
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What is this black stuff in my clutch reservoir?

42k miles, changing out my fluids and when I took the cap off the clutch fluid reservoir I saw this.

Any idea what it is and how do I clean it?
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Old 01-31-2019, 07:06 PM   #2
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Normal, flush it with new fluid.
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Old 01-31-2019, 07:27 PM   #3
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Normal, flush it with new fluid.
I just vacuum bled in new fluid and it didn't really go away. Old fluid was brown, new is clear.

If I agitate the black stuff it'll move. Should I stick a brush in there?
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Old 01-31-2019, 09:21 PM   #4
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I just vacuum bled in new fluid and it didn't really go away. Old fluid was brown, new is clear.

If I agitate the black stuff it'll move. Should I stick a brush in there?
If the dark stuff floats, just suck it out with turkey baster (don't tell SO/mom/wife/GF that you used it for that).


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Old 01-31-2019, 10:11 PM   #5
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If the dark stuff floats, just suck it out with turkey baster (don't tell SO/mom/wife/GF that you used it for that).


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Doesn't float, it's just at the bottom. The new fluid is clear though.
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Old 01-31-2019, 11:30 PM   #6
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Doesn't float, it's just at the bottom. The new fluid is clear though.
Oh well, I'd suggest you just sop up what you can and then like ol @Grady says, just flush it out.

It's just a hydraulic system, not an operating room -


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Old 02-01-2019, 12:37 AM   #7
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It's rubber worn from the piston seals. No worries.
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Old 02-01-2019, 01:51 PM   #8
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Happens all the time...I use a q-tip and swab it clean when I do a flush. Still doesn't clean things beyond the reservoir though, so there's probably no point in doing it, other than it making you happy.
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Old 02-02-2019, 06:08 PM   #9
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I stirred it up really well before bleeding. It's all gone afterwards.

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