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  1. #1

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    Why are brakes STILL soft after bleeding?

    Gang,

    Any ideas why I would have incredibly soft brakes before and after bleeding? Did all four after upgrading rears this week. There is a tremendous amount of pedal travel before the brakes begin to engage. In fact, I can push the pedal full distance with out the pressure of the brakes getting high enough to stop me from hitting the limit of the pedal travel (do you understand - that may be a little unclear). Nothing has changed from the way the brakes would travel before I bled the brakes. Something to note is I can pump the brakes when the car is off and the pedal travel will decrease with each pump. Then when the car is turned on, there goes any real resistance. Someone please help me. I don't want to careen into a semi this weekend. Oh I should note that there are no leaks that I have been able to detect.

    Thanks

    Timo

  2. #2
    Robby1870's Avatar
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    Why are brakes STILL soft after bleeding?

    The brakes gettin harded to press when the car is off is normal. However, your other problem......hmmmm.....mine have always been a little soft, but I think that is because the caliper is farther away from the rotor than other cars. Like, mine are soft because the caliper cmpresses a little with not resistance, because it hasnt touched the rotor yet. That maybe your problem. If you had the front calipers off when you bled them maybe you compressed the pistons a lot to get the caliper back over the rotor and it kinda remained that way. I would go to an open road and see if they work, if you are worried. Dont get going to fast, but like 30mph and slam them and see what happens. Thats what I would do.

    Robby
    Robby Whitesell
    2006 Pontiac G6 GT - 3500 V6

    1985 Toyota Pickup DLX - 2WD - 2.4L I4

  3. #3
    Lurker paulo57509's Avatar
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    Why are brakes STILL soft after bleeding?

    What you describe when the engine is not running is normal.

    The brakes are soft because there's still air in the system.

    After I got done with a rear caliper replacement, the only way I got the brakes to get firm was to flush/bleed using a power bleeder. I opened each bleeder screw starting at the ABS modulator to each caliper until clean fluid ran out.

    IMO, w-body brakes always feel crappy, but using a power bleeder made the brakes feel 100% better than before.

  4. #4

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    Why are brakes STILL soft after bleeding?

    I think I got a little post-trigger happy. The brakes seem to be working fine now. I did the 30mph test and the car stopped fine for the speed. I also drove the car for a couple of miles on the hiway where I would need to periodically brake but not stop. The pedal is not near as soft as it was before and immediately after I did my brake upgrade and front and rear line bleeding. I went through a bottle and a half of brake fluid before the lines were clean and without bubbles. Man, I love those cheap bleeding kits! I just was nervous, because brakes ain't like having a burnt out interior light. You guys are great! Thank you for your time.

    Timo

  5. #5
    Robby1870's Avatar
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    Why are brakes STILL soft after bleeding?

    Glad its working fine now.

    Robby
    Robby Whitesell
    2006 Pontiac G6 GT - 3500 V6

    1985 Toyota Pickup DLX - 2WD - 2.4L I4

  6. #6

    Why are brakes STILL soft after bleeding?

    Quote Originally Posted by paulo57509
    What you describe when the engine is not running is normal.

    The brakes are soft because there's still air in the system.

    After I got done with a rear caliper replacement, the only way I got the brakes to get firm was to flush/bleed using a power bleeder. I opened each bleeder screw starting at the ABS modulator to each caliper until clean fluid ran out.

    IMO, w-body brakes always feel crappy, but using a power bleeder made the brakes feel 100% better than before.
    Where did you get this power bleed system, and how much did it run you?
    Yeah, it's still on the road. 218K+ (WTF)



  7. #7
    Lurker paulo57509's Avatar
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    Why are brakes STILL soft after bleeding?

    Quote Originally Posted by Brian P
    Quote Originally Posted by paulo57509
    What you describe when the engine is not running is normal.

    The brakes are soft because there's still air in the system.

    After I got done with a rear caliper replacement, the only way I got the brakes to get firm was to flush/bleed using a power bleeder. I opened each bleeder screw starting at the ABS modulator to each caliper until clean fluid ran out.

    IMO, w-body brakes always feel crappy, but using a power bleeder made the brakes feel 100% better than before.
    Where did you get this power bleed system, and how much did it run you?
    I purchased a new one like this off of a seller on ebay.

    http://www.handsontools.com/store/sh...roduct_id=2801

    I forget how much I paid, but it wasn't any where near what appears above. IIRC, it was less than $100.

    I also ordered a KD adapter set on order to fit the bleeder to the MC.

  8. #8

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    Brakes

    Keep in mind fellas, before you even touch the brake pedal after you replace the calipers and before you bleed the brakes you have to pump the ebrake to draw up all the slack in the brakes. I bleed my brakes in my 90 Lumina 5 times all with a power bleeder with no luck. Then I read the manual word for word and found the proper sequence.

  9. #9

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    Why are brakes STILL soft after bleeding?

    The air bubbles like to break up into little tiny bubbles if you pump the pedal fast, makes for harder bleeding. Mine were soft at first too, seemed to work it self out some after a while. Sounds like yours did too.

  10. #10

    Why are brakes STILL soft after bleeding?

    did you check the seal on your brake fill res? Mine gave the impression that it was on but in the rear the rubber was hard and not giving a good seal and was just slightly leaking in the back where you can't see it making it slightly spongy.

  11. #11

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    Why are brakes STILL soft after bleeding?

    Mine actually has a screw on cap with a rubber seal. The seal is in excellent condition. The brakes are no longer soft. In fact, they seem to be just right.

    Timo

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