Need help finding a leak for the brakes.

Tiny
JRANNE1994
  • MEMBER
  • 2000 CHEVROLET SILVERADO
  • 190,000 MILES
My husband changes brakes front and back also all 4 calipers. We bled the brakes and have them pumped up, but as soon as you start the truck and wait about 20 seconds the peddle goes to the floor. He bought a one man bleeder and it says there is a leak, but we can not find it. We are at our wits end and don't know what else to do.
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Sunday, April 1st, 2012 AT 10:49 PM

5 Replies

Tiny
ASEMASTER6371
  • EXPERT
If you had a leak, you would see it puddle somewhere. It sounds like you have air in the system caught somewhere.

Why did you do this operation?

Roy
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Sunday, April 1st, 2012 AT 11:12 PM
Tiny
JRANNE1994
  • MEMBER
My husband changed the calipers mainly because one wasn't working right in the back so he changed all the calipers and the decided that he might as well change the brakes to since the one was worn down due to the bad caliper. He bled the brakes because the peddle was going down farther then it should. We got all the air out of the lines but like I said after starting the truck and waiting about 20 seconds the brake peddle goes to the floor. There is no puddle that is why we are having a hard time trying to find the leak.
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Sunday, April 1st, 2012 AT 11:22 PM
Tiny
ASEMASTER6371
  • EXPERT
Did you pump the pedal several times to get the pads back up to the rotors? If so, you may have lost the master cylinder. Get a shop to look at it and confirm.

Roy
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Sunday, April 1st, 2012 AT 11:28 PM
Tiny
JRANNE1994
  • MEMBER
Ok. Thank you
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Monday, April 2nd, 2012 AT 12:06 AM
Tiny
ASEMASTER6371
  • EXPERT
Good luck
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Monday, April 2nd, 2012 AT 12:08 AM

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