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Old 05-24-2010, 03:00 PM   #1
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New brakes and still spungy

The first problem I had was that the right front caliper locked up so I figured that the caliper was bad so I replaced the two front calipers, rotors, and pads. I did the proper bleeding proceedures and the pedal would go to the floor. I bled a whole large bottle through the system and still spungy. So I figured that it must be the master cylinder. I replaced the master cylinder and bled everything and the pedal is better but is still really close to hitting the floor. I am running out of ideas. I would appreciate any help. Thank you.

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Old 05-24-2010, 03:18 PM   #2
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Did you bleed the rears too? or just front?

Need more info on how you went about bleeding them. Air is in the lines somewhere.

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Old 05-24-2010, 03:23 PM   #3
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Most of the "pedal feel" comes from the rear brakes. With your symptoms, you have air towards the back of the jeep. You'll need two people to bleed 'em, pump the pedal, release pressure, release pedal, etc... and follow the proper order.

Heres the order;

Making sure the master cylinder is full of fluid, and the lid back on (otherwise a small gusher of fluid will blow up from the resevoir, and you don't want brake fluid on painted parts), have one person pump the brake pedal until a good (or as best XXX XXX get at the time) pedal feel is achieved, and hold pressure on it. The other guy/gal, goes to the farthest brake from the master cylinder (passenger side rear) and opens the bleeder enough to get air and any fluid out. As soon as your pedal persons foot reaches the floor and holding, you close the bleeder screw. If the screw isn't snugged back when the pedal person lifts off the brake pedal, air will be re-introduced into the system. Repeat, until you are confident all air is removed from that line, then move to the drivers side rear, passenger side front, and finally drivers side front. Keep checking the master cylinder resevoir often to make sure fluid is topped off, and you aren't re-introducing air into the system.
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Old 05-24-2010, 03:27 PM   #4
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Did you bleed the rears too? or just front?

Need more info on how you went about bleeding them. Air is in the lines somewhere.

I bled all four starting at the right rear to the left rear to the right front to the left front. There was very little air and made sure I kept bleeding until there was no more air.


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Old 05-24-2010, 03:29 PM   #5
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...and Welcome to the forum!
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Old 05-24-2010, 03:31 PM   #6
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Quote:
Originally Posted by tonyrosa82 View Post
I bled all four starting at the right rear to the left rear to the right front to the left front. There was very little air and made sure I kept bleeding until there was no more air.


Tony
keep at it... keep bleeding in that order over and over. Being new calipers, they may suck in quite a bit of fluid. Either a. you still have air in the lines. Or b. you have a leak somewhere.
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Old 05-24-2010, 03:34 PM   #7
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Did the master come with a bleed kit?Take off your lines and put the kit on it and bleed the master into itself.Then go thru your bleeding procedure for each individual brake.
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Old 06-16-2010, 02:36 PM   #8
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sevenservices, thank you for the bleeding procedure. my front driver caliper won't let go, so i'm replacing both front calipers, roters, and pads tonight. never had to bleed before and was unsure how to go about. thanks again!
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Old 06-16-2010, 02:52 PM   #9
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sevenservices, thank you for the bleeding procedure. my front driver caliper won't let go, so i'm replacing both front calipers, roters, and pads tonight. never had to bleed before and was unsure how to go about. thanks again!
Welcome to the Forum!!! Take your time, Im sure you'll do just fine. It helps soooo much to have a second person. My dad used to have me sit in his cars and pump the peddle up and hold it. Then he'd yell "release it and pump it up again" "ok" "hold it", again and again. He would put a piece of plastic aquarium hose on the fitting then run it into a jar of fluid. When letting the air out, it would bubble in the jar if there was still air. And, if I (being a kid) happened to let up off the pedal at all, it would suck fluid in rather than more air
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Old 06-27-2010, 01:51 AM   #10
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I had the same issue. Sounds like maybe a brake line is cracked or leaking somewhere?
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Old 07-14-2010, 12:17 PM   #11
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and that is exactly what i told my kid to do! that is great! <turn screw> PRESS DOWN AND HOLD IT <turn screw> RELEASE..........<turn screw> PRESS DOWN AND HOLD IT <thrun screw>...........over and over. and yes, he did let go of the pedal a few times and all the air previously let out....well, anyway........... thanks again. the passenger brake pad was so bad that it was fused to the caliper and i had to actually chisel some of the caliper piston away to get it off the rotor. it was nuts!
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Old 07-17-2010, 03:03 PM   #12
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I had the same problem with the sticking left front caliper.Replaced L & R calipers,pads,flexible lines and rear shoes. I've gone thru 2 quarts of fluid and still getting air out of the system. Just how much air will the cailpers hold? The rear brakes have no air in the lines when bled, but the front....almost like a kid blowing bubbles into a drink with a straw. Should I keep at it or start looking somewhere else??
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Old 07-21-2010, 04:03 PM   #13
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I finally got a good pedal with the brakes. Ended up removing the calipers from the rotors and bleeding them. I held the caliper with the bleeder at the highest point, and had a helper pump up the pedal. Bleed, then repeat about three times,and they got solid. Remounted them and tested. Good as new now.

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