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Old 03-07-2011, 11:32 AM   #1
robbyj
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Default Spongy Brakes..

After a little bit of fun at winton raceway for the fun day, on my last session i noticed my brakes were getting really 'spongy'. After the session and pulling in a little exclamation mark appeared on my cluster (!). so i switched it off and let it cool down.

This morning, when i started the car, still had the (!), so i gave the brakes a few good pumps, which made the (!) disappear but my brakes are still 'spongy'

Can anyone give me an idea what this might be, air in the lines? needs new fluid? etc etc


my definition of spongy: having to push the brake pedal in really far with not much braking occurring

Really need a manual for the track, the brakes get a fair workout!

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Old 03-07-2011, 03:25 PM   #2
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Default Re: Spongy Brakes..

I'd say that you boiled the brake fluid at some point and gotten air in the master cylinder and lines i'd give the brakes a good bleed and check all the lines for any cracks and swelling. And then see if the (!) light still comes on also how much is left on you brake pads ??

Cheers Lorenz
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Old 03-07-2011, 05:41 PM   #3
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Default Re: Spongy Brakes..

the light doesnt come on any more but they are still spongy, pads still seem to be ok so might have to bleed them as you say, cheers mate
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Old 03-07-2011, 05:47 PM   #4
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Default Re: Spongy Brakes..

As FORD FALCON XR6 has mentioned. The brake fluid has probably been boiled. So if you're bleeding them and planning on some more track days, put a high temp brake fluid in, rather than the normal run of the mill stuff.
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Old 03-07-2011, 08:35 PM   #5
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Default Re: Spongy Brakes..

Quote:
Originally Posted by svo supporter
As FORD FALCON XR6 has mentioned. The brake fluid has probably been boiled. So if you're bleeding them and planning on some more track days, put a high temp brake fluid in, rather than the normal run of the mill stuff.
Cheers mate.
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Old 04-07-2011, 08:16 AM   #6
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Default Re: Spongy Brakes..

I'm using penrite hi temp stuff and it does the trick for the hills
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Old 04-07-2011, 11:15 AM   #7
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Default Re: Spongy Brakes..

I recently had the same thing happen, although not on the track. Turns out one of my rear pads was sticking and the brake fluid boiled. Scary thing pushing the brake pedal all the way to the floor and nothing happening.

Is there any consequence to boiling the brake fluid (apart from loss of stopping power)? I mean, does it degrade the fluid or will it damage the braking system?
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