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Old

Apr 25, 2010 | 06:20 PM

#1

BLOhio

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Heel & Toe

Joined: Aug 2009

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From: Glouster Ohio

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Brake help

ok in the fall i replaced all 4 calipers blead the brakes had good pedal...Drove the car Friday and brakes felt good....Saturday morning went out and pedal is really soft but brakes still work but pedal goes to floor....I checked fluid and its full no leaks anywhere...Any ideas? Thanks for any help...Its a 1979 if it makes a difference..

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Old

Apr 25, 2010 | 06:45 PM

#2

Duke94

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Joined: Mar 2001

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From: Ann Arbor Michigan

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Too much rotor runout. Causes the piston to move in/out and suck air. You may have to shim the rotors to reduce the runout. Were the rotor turned?

Gary

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Old

Apr 25, 2010 | 06:52 PM

#3

71coupe454

Burning Brakes

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From: Clarksville Indiana

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If the pedal pumps up good or not, holds or bleeds off, might help narrow it down..

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Old

Apr 25, 2010 | 07:55 PM

#4

BLOhio

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From: Glouster Ohio

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I replaced all the rotors when i did the calipers...Yes the pedal does pump up and hold...but after you let off and hit them later it soft again..

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Old

Apr 26, 2010 | 03:58 PM

#5

Duke94

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From: Ann Arbor Michigan

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Quote:

Originally Posted by BLOhio

I replaced all the rotors when i did the calipers...Yes the pedal does pump up and hold...but after you let off and hit them later it soft again..

If you have a long pedal from just sitting (not driving) then it's not rotor runout. Sounds like you still have air in the system.

Gary

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Old

Apr 27, 2010 | 12:22 AM

#6

BLOhio

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Heel & Toe

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From: Glouster Ohio

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OK so i think i will bleed the brakes again before changing the master cylinder. Thanks for everyones help..I will update tomorrow

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