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Old 10-29-2005, 03:38 PM
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Bad master or booster ? or something else

I have a 79 Z28 . The brake pedal goes to the floor but I still have a little braking. The rear chamber on the master cyl. was empty the front was fine but what I cant figure out is there is no leaks under the car. I dont know where the fluid went the wheel cylinders are good. A friend of mine said the booster could be bad and the fluid is going in there. Is there any easy way to check ? The vacuum line from the booster has no fluid in it neither does the little check valve in the line.

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Old 10-29-2005, 03:56 PM
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anthonyc,

It sounds like the master cylinder is bad. The fluid leaks out the cylinder and down the firewall. This happens in an area that you can not see too well. It doesn't drip to the ground because dirt and dust catch it as it slowly flows down so it never drips.

Scholman
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Old 10-29-2005, 07:31 PM
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Sometimes the rearmost seal in the MC will go bad, and the leaking fluid will go into the booster. Loosen the MC & see if there's fluid in the backside of it.
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Old 10-30-2005, 06:38 AM
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jimfulco nailed it, that booster is full of fluid.

Vince
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Old 10-30-2005, 09:16 AM
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Ok guys thanks. I am gonna go pick up a new master cyl. right now. Can I just leave the booster alone. If there is a little fluid in there does it really matter ?
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