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Author Topic: Spongey Brakes  (Read 983 times)

Judderi

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Spongey Brakes
« on: 24 June 2007, 15:43 »
After a garage replaced my rear axle they simply couldent get the brakes to feel right. I wasnt that bothered because i was going to put some braided lines on and thought i will just do it myself. Anyway ive put all 6 braided lines on, checked each caliper and bled the system thoroughly till frest new clear fluid came through. But its still the same. Pedal nearly goes to the floor and the brakes are very poor. Do you recon i need a new master cylinder?
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Offline bomp

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Re: Spongey Brakes
« Reply #1 on: 24 June 2007, 15:58 »
Brand new disc pads will take up alot of slack, well it did on mine.
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Offline Mr Blue

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Re: Spongey Brakes
« Reply #2 on: 24 June 2007, 16:27 »
I have spongy brakes when my rear calipers start seizing up. A large hammer usualy sorts them out :wink:

Tried adjusting the rear brake load sensor thing (forgot the technical name)


Might be a faulty master cylinder. They are cheap to replace anyway
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Offline mattneck(Beavis)

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Re: Spongey Brakes
« Reply #3 on: 24 June 2007, 16:47 »
To the floor.

Poor.

Master Cylinder. Had the same on mine when I first got the car chap.. It's not hard, and it's not expensive  :smiley:
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Sharpo says: (16:57:39)
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Judderi

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Re: Spongey Brakes
« Reply #4 on: 24 June 2007, 20:25 »
Yeah the pedal goes to the floor. i can get all 4 wheels to lock but do have to push all the way to the floor. And yes i bled the system with the bias valve clamped open. I also dont have any seized calipers as ive checked. Disks and pads are also fine.

Guess i will have to try the Master Cylinder. Ta
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Offline Classy6

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Re: Spongey Brakes
« Reply #5 on: 25 June 2007, 23:45 »
Could be seals on the master cylinder. How much did you bleed the system though? Are you absolutley postive there is no air remaining in the system seeing as you replaced all the brake lines.

Might be worth checking all the pipework aswell for leaks seeing as mk2's are now at the prime age for rusting on brake lines.
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Offline monzablue16v

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Re: Spongey Brakes
« Reply #6 on: 26 June 2007, 20:17 »
When you bleed the brakes if the pedal hits the floor it generally blows your master cylinder so be careful when you've changed it.
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Quote from: AlanD on 24 October 2008, 13:33
Probably got lost in the "Great Crash of 08

Offline Retrocool

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Re: Spongey Brakes
« Reply #7 on: 26 June 2007, 20:29 »
I've had this before and it was the master cylinder and 2 of my slaves cylinders that had gone so i'd make sure those are good too...
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Judderi

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Re: Spongey Brakes
« Reply #8 on: 02 July 2007, 10:27 »
Well i changed the MC this weekend but its no different! I think i may have missed something though. What is the pin you get with a new MC? Should it go inbetween the servo and MC somewhere? anyone got pics?
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