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Author Spongy Brake Pedal---HELP
Twinny2
Member

Registered: 26th Jul 06
Location: Bacup, Lancashire
User status: Offline
9th Apr 09 at 22:43   View User's Profile U2U Member Reply With Quote

Hi. I have a corsa b with 2.0 front calipers and rear drums. I have replaced all the flexis and put new brake slave cylinders on the rear and tried bleeding the system through with new brake fluid.

I have put around 500ml of fluid into the system to get to the point where air seemed to not be coming out anymore but yet my brake pedal still feels spongy.

What is the brake fluid capacity of a corsa brake fluid system and how can i sort this spongy pedal and also release any trapped air that may be in the system?

Thanks for your help, it's jus the car is in for mot next saturday and i dont want it to fail on the rollers.

Twinny2

[Edited on 09-04-2009 by Twinny2]
maxx16v
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Registered: 25th Dec 08
Location: Falkirk
User status: Offline
9th Apr 09 at 22:50   View User's Profile U2U Member Reply With Quote

sounds like you still have a little more air in the system
corsa_chr1s
Member

Registered: 22nd Dec 08
Location: castleford,west yorkshire
User status: Offline
9th Apr 09 at 23:21   View User's Profile U2U Member Reply With Quote

nackerd servo
Twinny2
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Registered: 26th Jul 06
Location: Bacup, Lancashire
User status: Offline
9th Apr 09 at 23:47   View User's Profile U2U Member Reply With Quote

is that a big job to change? would it make the 2.0 brakes better if they have a 2.0 servo fitted? also, would a 2.0 servo fit on a corsa?

thanks
Twinny2
Member

Registered: 26th Jul 06
Location: Bacup, Lancashire
User status: Offline
10th Apr 09 at 08:36   View User's Profile U2U Member Reply With Quote

bump
barneykarl
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Registered: 29th Jul 06
Location: Stevenage
User status: Offline
10th Apr 09 at 11:09   View User's Profile U2U Member Reply With Quote

Servo only amplifies pedal pressure applied, are your bleed nipples at the top on calipers, try using a brake bleeding kit to ensure you remove all air, you may have a defective master cylinder or poor master seals.
thegsi
Member

Registered: 3rd Feb 07
Location: Kidderminster Drives: Evo (you can't afford one)
User status: Offline
10th Apr 09 at 14:30   View User's Profile U2U Member Reply With Quote

Does the pedal feel spongey then start to firm up after 3-4 presses?
supremefaulk
Member

Registered: 5th Feb 08
Location: Bridgend
User status: Offline
10th Apr 09 at 15:06   View User's Profile U2U Member Reply With Quote

Mine does that "thegsi"!!
Does that mean it needs a good bleeding? Or a knakered master?
swill_omnibus
Member

Registered: 12th Dec 07
Location: : S. wales Drives: Dodge Caliber
User status: Offline
10th Apr 09 at 15:13   View User's Profile U2U Member Reply With Quote

quote:
Originally posted by supremefaulk
Mine does that "thegsi"!!
Does that mean it needs a good bleeding? Or a knakered master?
thegsi
Member

Registered: 3rd Feb 07
Location: Kidderminster Drives: Evo (you can't afford one)
User status: Offline
10th Apr 09 at 15:39   View User's Profile U2U Member Reply With Quote

Ok. Are you sure you put the calipers on the right sides? Ie: is the hose connection on the top of the caliper when mounted on the disc?
moka
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Registered: 11th Mar 06
User status: Offline
10th Apr 09 at 18:56   View User's Profile U2U Member Reply With Quote

mine are like this too!
Twinny2
Member

Registered: 26th Jul 06
Location: Bacup, Lancashire
User status: Offline
10th Apr 09 at 20:13   View User's Profile U2U Member Reply With Quote

il have to check but i understand where you are coming from. i'll check tomorrow. im pretty sure they're at the top.

Thanks for everyones help
Twinny2
Member

Registered: 26th Jul 06
Location: Bacup, Lancashire
User status: Offline
11th Apr 09 at 07:43   View User's Profile U2U Member Reply With Quote

i've checked, theyre at the top. i bled the rears earlier and a bit of air came out. im going to bleed the fronts in a bit and see if this happens again

 
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