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Old 12-30-2008, 08:26 PM   #1
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Clutch Master Cylinder

I've replaced the Clutch Master Cylinder 3 times in the last year. Get in, and it's leaking on the inside. Installation is proper - I've checked it with the manuals and stopped by the dealer and double checked it with them. Why does it keep leaking? Is there something that causes it too? Any help would be appreciated. Thanks (4 cylinder 88 yj)

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Old 12-30-2008, 08:43 PM   #2
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hopefully you are using fresh fluid from a new can
Dot3 Brake fluid
I had a Cherokee 1985 model I replaced the clutch master a few times in the same amount of years
Is it a new master or rebuilt??

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Old 12-30-2008, 10:23 PM   #3
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I know not much about brake systems but maybe its a bad seal somewhere... hope I dont make myself sound like an idiot but maybe it helped you a bit
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Old 12-30-2008, 10:58 PM   #4
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The first two were rebuilt, the third was a brand new raybestos. I use clean fluid, and since the system is so short, it ends up flushing it every time I bleed the lines. This last time it leaked, the fluid was very thick, and almost gray in color.

If the cylinder is brand new, the seals should be good (I know a master brake cylinder that has sat on a shelf can go have seals that go bad, but this clutch cylinder worked fine for about 5-6 months, so I don't think that is it)

I don't know if this is true, but I've heard that the pedals can go, and cause the rod to go in crooked, over time, it wears out the cylinder. Any one know if that is a genuine cause?

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Old 12-31-2008, 08:45 AM   #5
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Don't know about that pedal thing.
Any body got any recommendations for a clutch master.
Like I said the Cherokee I had did the same thing (ate clutch masters)
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Old 12-31-2008, 05:12 PM   #6
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Hey John,
Did it ever stop going through cylinders? Or did you just keep rebuilding/replacing?

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Old 01-01-2009, 10:40 AM   #7
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Yes I finally did get one to last a few years
Bought a new one from Napa Auto
Then the trans went and so went the Jeep
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Old 01-01-2009, 10:39 PM   #8
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I guess I'll just keep replacing then - hopefully one comes along that will stick. At least the jobs not too bad.

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Old 01-01-2009, 11:40 PM   #9
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is your supplier warrantying those
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Old 01-02-2009, 11:10 PM   #10
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At first I tried a rebuild (twice), then went throught two rebuilts, and now this one is under warranty for a year - though I would prefer the part to last at least a year before having to replace it. But yeah, it's now covered under warranty.

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Old 01-07-2009, 09:58 AM   #11
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Yeah
Best to buy new in this case
I learned my lesson

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