displaying posts 1 to 12 of 12

Author Subject: brake bleeding?
jimmyhackers

Seasoned Pro

Location: birmingham

Registered: 14 Jun 2011

Posts: 1,112

Status: Offline

Post #1
i have replaced my rear calipers with recond ones. and bled the whole system (two man method). this all went swimmingly.

however the same problem remains, with the engine on the brake pedal has no pressure even at the very end but its does brake (stop the car) at the very end of the pedals travel (no feeling in pedal)

the same problem was there before with the original calipers but due to snapped nipples i assumed it was not bled properly.

i left the car sitting with no rear calipers on it for a few days and the system drained itself over that course, (could this be a problem?).

my questions are....... do i need to bleed the brakes while doing anything to the abs stuff? ive read a few people saying disconnect the abs ecu etc?

if not and its the brake servo that cream crackered. can i use the one from my 2.0 xsi?

thanks for any help in advance

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the world is changed by people in sheds
Posted 5th May 2012 at 10:20
mr swampy s16

**BAD SELLER**

Location: out and about

Registered: 22 Oct 2003

Posts: 10,550

Status: Offline

Post #2
A lAck of servo makes the pedal very hard.

Try pumping the pedal when you brake, if they improve it points to the master cylindrr
Posted 5th May 2012 at 10:28
welshpug!

Capt Pedantic

Location: Bigend, Wales.

Registered: 27 Mar 2007

Posts: 25,817

Status: Offline

Post #3
is your load compensator seized?

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Posted 5th May 2012 at 10:36
fatlapit

Seasoned Pro

Location: STOCKSFIELD

Registered: 02 Nov 2010

Posts: 3,040

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Post #4
Abs has nothing to do with it. its either brake servo or compensator. to test the servo. with the engine off pump the pedal until the pedal goes hard, when its hard keep the pedal depressed and start the engine. if the pedal does not depress further the brake servo is buggered.

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Posted 5th May 2012 at 11:22
stan_306gti6 Forum Admin

Location: Kent

Registered: 18 Jan 2004

Posts: 21,768

Status: Offline

Post #5
It will not have helped with the system completely draining of fluid.

You need to re-bleed them and starting with the rear calipers ensuring you have a hard pedal after each caliper. Then move onto the fronts. And use a clear tube for bleeding if possible so you can see any bubbles. Smile

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Posted 5th May 2012 at 14:59
fatlapit

Seasoned Pro

Location: STOCKSFIELD

Registered: 02 Nov 2010

Posts: 3,040

Status: Offline

Post #6
Or pressure bleed them

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Posted 5th May 2012 at 15:25
jimmyhackers

Seasoned Pro

Location: birmingham

Registered: 14 Jun 2011

Posts: 1,112

Status: Offline

Post #7
i have a feeling my assistant (mate) wasnt up to scratch Sad i will try bleeding them again with a better one (dad) and see what happens.

if it turn out to be a faulty master cylinder or servo will the brake servo/master cylinder from my xsi be the same? its up for its mot in a month and between the two its the gti all the way.

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the world is changed by people in sheds
Posted 5th May 2012 at 18:45
welshpug!

Capt Pedantic

Location: Bigend, Wales.

Registered: 27 Mar 2007

Posts: 25,817

Status: Offline

Post #8
mc is gti/wallye specific and I would not be using an used one.

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Posted 5th May 2012 at 18:53
ryangti6

Seasoned Pro

Location: Pontypool

Registered: 01 Sep 2006

Posts: 1,839

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Post #9
welshpug! wrote:
mc is gti/wallye specific and I would not be using an used one.


No it's not, the late 1.8's had the same fitted as did the late 2.0 16 valve xsi's.

Also nothing wrong with using a used one aslong as you know it's good Imo.

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Ryan
Posted 5th May 2012 at 19:58
tvrfan007

Seasoned Pro

Location: In the garage

Registered: 29 May 2005

Posts: 3,488

Status: Offline

Post #10
If the system has run dry and you've only bled on the drive you'll almost certainly have air in your abs - i'm not convinced this is the whole issue you have but will form a part of it. Find a loose surface and cycle the abs a number of times, then lock up a few miles (30 or so with lots of braking) then re-bleed.

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Posted 6th May 2012 at 05:11
jimmyhackers

Seasoned Pro

Location: birmingham

Registered: 14 Jun 2011

Posts: 1,112

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Post #11
well i left the two rear calipers off and the hoses drippign into pint glasses for about 3 days while i was away at work. might just need a re-bleed

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the world is changed by people in sheds
Posted 8th May 2012 at 22:52
stan_306gti6 Forum Admin

Location: Kent

Registered: 18 Jan 2004

Posts: 21,768

Status: Offline

Post #12
jimmyhackers wrote:
well i left the two rear calipers off and the hoses drippign into pint glasses for about 3 days while i was away at work. might just need a re-bleed


Blink

Why would you do that? You should of just left the lines screwed into the calipers until you had the time to bleed them properly. Yes

________________________________________

"Supercharged - 454.1bhp/317.5lb/ft"
Peugeot 306 GTi-6
2000 (X), Moonstone Love
Posted 9th May 2012 at 00:03

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