C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Brake Fluid Disappearing

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Old Dec 27, 2007 | 06:11 PM
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Default Brake Fluid Disappearing

In the past few weeks I have had to fill the resevoir on the master cylinder twice. the fluid is disappearing somewhere, I checked all the lines and calipers and the ABS pump, and they all dry. Does anyone have any ideas.
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Old Dec 27, 2007 | 06:25 PM
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Power brake booster perhap?

Check both the vacuum line, and remove the master cylinder from the booster.

Also see it it's not leaking into the passenger cabin.
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Old Dec 27, 2007 | 08:35 PM
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My 88 was doing the same thing. I had to replace my booster and found the fluid weeping out between the booster and master cylinder. If I hadn't removed the booster I would probably still be looking for the leak.
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Old Dec 27, 2007 | 08:47 PM
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Originally Posted by BrianCunningham
Power brake booster perhap?

Check both the vacuum line, and remove the master cylinder from the booster.

Also see it it's not leaking into the passenger cabin.
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Old Dec 28, 2007 | 11:02 AM
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It's the master cylinder. Thanks for the help.
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Old Dec 28, 2007 | 03:51 PM
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The fluid is most likely going from the rear of the master cylinder into the brake booster.
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