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Old 09-25-2006, 08:19 PM   #1
Steven62387
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1998 SC2
Dizzy Spongy Brakes

Ok so i was goin down the interstate and had to slam on brakes like everyone in front of me to avoid some plastic paysets in the middle of the road. the tires skipped and then finally screeched. Well after this the brakes were no longer working correctly.

I decided to buy new calipers, pad, shoes, wheel cylinders and rotors. After all was replaced the brakes were spongy, so i bled and rebled again. The back drums were adjusted so tight they were dragging, so those were adjusted tonight. Along with stripping a stud and 2 lugnuts yippee. And to top it all off the brakes are STILL spongy, i dont know what it could be. If ANYONE has any advice...please let me know...this is getting very irratating. It could be the brake booster or master cylinder. i just dont know

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Old 09-25-2006, 08:24 PM   #2
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Default Re: Spongy Brakes

The only think I can think is that you had some air in the ABS system, and when the ABS activated, it let it into the rest of the system. You should probably have the brakes bleed by someone with the proper scan tool to reset the ABS (or something). You can't properly bleed the Saturn ABS brakes without a special tool.
If you don't have ABS, then this is irrelevant and I have no clue.
If you hold the pedal firmly, will it sink to the floor-if so, you have a leak somewhere, which could have been caused by a panic stop.
good luck

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Old 09-25-2006, 08:33 PM   #3
Steven62387
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1998 SC2
Default Re: Spongy Brakes

nope, I dont have ABS on my car, and i dont think i have a leak anywhere, but there might be something caught in the lines. Is it a good idea to flush or bleed the entire system and put all new brake fluid?

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Old 09-25-2006, 08:39 PM   #4
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Default Re: Spongy Brakes

yes, put new fluid in there. Use a turkey baster to extract fluid from the reservoir. Then, refill with new fluid. Pump the brakes and have somebody crack open each bleeder until new fluid comes out. If you have to, vaccuum bleed them.

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Old 09-25-2006, 10:08 PM   #5
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Default Re: Spongy Brakes

ok, but how do you vacumm bleed them? cant i just crack open the bleeders and just continuesly pump the brakes to get it all out?

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Old 09-26-2006, 06:35 AM   #6
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Default Re: Spongy Brakes

First off, you haven't bled the brakes properly yet. Here's what you don't appear to understand, so far. When you open the bleed screws, the flow can go two ways. Meaning you can suck air into the system as well as take air and fluid out. The proper way to bleed brakes w/o special tools is to have an assistant pump the brakes a few times to pressurize the system then hold the brake down. While they continue holding the brake, you loosen and tighten the bleeder screw quickly. You have to tighten the screw before all the pressure is relieved otherwise you pull air back into the system.

A vacumn bleeder can be found at any auto parts store. However, I think you'd be better off with some speed bleeders. They are available here. Many parts stores carry them as well. They are bleeder screws that only allow one way flow. So, then you can just pump them the way you envision.

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Old 09-27-2006, 02:19 PM   #7
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Default Re: Spongy Brakes

I've used my Motive Power Bleeder on our Saturn. It is the easiest way to bleed brakes for sure. I still have problems with a spongy pedal, I'm not sure if it is caused by ballooning brake lines or not.

Have any of you replaced your brake lines with new rubber or stainless braided lines? I've heard that as the lines get old they expand and cause a spongy pedal.

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Old 09-27-2006, 02:49 PM   #8
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Default Re: Spongy Brakes

Quote:
Originally Posted by Bluesideup
I've used my Motive Power Bleeder on our Saturn. It is the easiest way to bleed brakes for sure. I still have problems with a spongy pedal, I'm not sure if it is caused by ballooning brake lines or not.
Yes a pressure bleeder is another way to do it. You probably have ABS. If so, I'm afraid you'll have to put it in the shop to get the brake bled or replace the master cylinder.

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Old 09-27-2006, 07:46 PM   #9
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Default Re: Spongy Brakes

there is a very big difference between a spongy pedal and a pedal with long traveling distance, but effective. My car has a long pedal travel, but still stops well. Not nearly as good as my mom's car, but still good.

Over time, the rubber lines can balloon, but they are built with threads inside the rubber so that does not happen. Stainless Steel braided brake lines will increase your brake pedal feel, and thats one thing on my x-mas list

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Old 09-27-2006, 09:08 PM   #10
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Default Re: Spongy Brakes

How to Bleed Brakes - The Right Way
http://www.teamscr.com/brakes.html

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Old 09-27-2006, 10:30 PM   #11
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1997 SL1
Default Re: Spongy Brakes

My daughter was driving my 94 sl1 had panick stop brake did same thing , found out that master cylinder was leaking , take mounting bolts off master cylinder at booster pull cylinlider away from booster if you see or have any brake fluid there you have blowan seal in master cylinder , i did and replaced master cylinder, re -bleed hole system my problem solve ,hpe this mite help.

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Old 09-28-2006, 08:13 AM   #12
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Default Re: Spongy Brakes

Thanks for the tip, I'll try to check that out soon. Our car is a very basic SL1 without ABS. The brakes just don't seem to be very effective at stopping, just like when I boiled the brake fluid on a different car at the track.

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Old 09-28-2006, 10:23 AM   #13
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Default Re: Spongy Brakes

Just a quick reminder. Wear gloves when you're working with brake fluid. That stuff is particularly nasty and is absorbed through bare skin.

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