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Old 08-26-2010, 12:27 AM   #1
Mike Quillici
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Master Cylinder Bad?

I went to replace my front brake hoses today, and as soon as I disconnected the passenger side brake hose, fluid began running out of the steel brake line. It continued to run until it drained the front reservoir of the master cylinder completely. I don't know for sure, but I wouldn't think that this should have happened.

Please advise!
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Old 08-26-2010, 12:43 AM   #2
hotrod100
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Re: Master Cylinder Bad?

Nothing unusual with this. Perfectly normal.
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Old 08-26-2010, 12:52 AM   #3
Mike Quillici
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Re: Master Cylinder Bad?

Phew. Good to know.
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Old 08-26-2010, 01:15 AM   #4
Mike Quillici
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Re: Master Cylinder Bad?

On another note. I think my proportioning valve is sticking. Occasionally, the brake light comes on, and won't go off until I hit the brakes hard. I usually hear something click when that happens. Is there anything that I can do to fix this, other than replacing the proportioning valve?
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Old 08-26-2010, 07:51 AM   #5
cdowns
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Re: Master Cylinder Bad?

have you pulled off the rear drums and checked for indications of leaking wheel cylinders???
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Old 08-26-2010, 11:39 AM   #6
Mike Quillici
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Re: Master Cylinder Bad?

Negative. Not yet. Could that cause the proportioning valve to stick?
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Old 08-26-2010, 12:04 PM   #7
ChevLoRay
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Re: Master Cylinder Bad?

It may be that the "188,000 miles, give or take" caused the proportioning valve to go bad.
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Old 08-26-2010, 12:07 PM   #8
Mike Quillici
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Re: Master Cylinder Bad?

That's kinda what I was thinking. It doesn't look like regular auto parts stores sell them either. . .and at LMC they're quite pricey.
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Old 08-26-2010, 08:10 PM   #9
Mike Quillici
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Re: Master Cylinder Bad?

Incidentally, what the heck size wrench fits the compression fitting between the brake hose and the brake line???
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