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Author Subject: Hard Peddle
eddy_gti6

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Location: Durham

Registered: 20 Oct 2008

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Post #1
I have just fitted some wilwood midilites and a gti6 master cylinder with fresh ATE super blue racing fluid.
I drained all of the old fluid from thefront and back brake lines before changine the front calipers. Also fitted new braded lines along with the calipers and bled the full system going from offside rear to near side rear to offside front and nearside front. Then went round again to double check i got all the air out.
Fitted the wheels and took it for a drive and the peddle is rock hard.
Basicley when you have your engine turned off and pump the peddle it goes hard, then when you start the car it goes soft again. Well mine didnt, its still hard.
There are no fluid leaks from the pipes or joints, vaccume pipe is still conected to the servo too.

Any ideas?

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Posted 16th Dec 2012 at 18:30
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mr swampy s16

**BAD SELLER**

Location: out and about

Registered: 22 Oct 2003

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Post #2
Sounds like a servo issue
Posted 16th Dec 2012 at 18:35
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24seven

Seasoned Pro

Location: Derby

Registered: 05 Oct 2005

Posts: 6,221

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Post #3
Have you got the valve in the vacuum hose the wrong way round?

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Posted 16th Dec 2012 at 18:36
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eddy_gti6

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Location: Durham

Registered: 20 Oct 2008

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Post #4
Av not took the vacuum hose off. Also my servo was fine thismorning before i changed my brakes and master cylinder.

May try putting the xsi Master cylinder back on

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Posted 16th Dec 2012 at 18:42
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simonjames

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Location: Whitland S.Wales

Registered: 23 Nov 2004

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Post #5
have you disturbed the vacuum ?

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Posted 16th Dec 2012 at 19:19
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eliotrw

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Location: Southwark

Registered: 18 Jul 2010

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Post #6
Might go away after a bit.
I had the same after new fluid and pads from a garage but after about 3 trios it sorted itself out :/
Not very scientific obviously

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Posted 16th Dec 2012 at 19:21
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eddy_gti6

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Location: Durham

Registered: 20 Oct 2008

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Post #7
Didnt touch the vacuum but i will give it a once over in the morning to see.

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Posted 16th Dec 2012 at 20:12
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tvrfan007

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Location: In the garage

Registered: 29 May 2005

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Post #8
What size are the wilwood pistons? I take it fluid appeared everywhere during the bleeding sequence?

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Posted 17th Dec 2012 at 04:37
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coskev

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Location: Oswestry

Registered: 01 Nov 2009

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Post #9
Hard pedal but the brakes are working/biting well?Dunno

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Posted 17th Dec 2012 at 09:49
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eddy_gti6

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Location: Durham

Registered: 20 Oct 2008

Posts: 8,716

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Post #10
Yes there was fluid in every caliper and on the 2nd run around there was no air in the system, just fluid.

Yes they are working but not as well as they should, i have to put some force into the peddle

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Posted 17th Dec 2012 at 09:53
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jorg

Senior User

Location: Wallasey

Registered: 10 Jun 2007

Posts: 816

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Post #11
If you swopped the master cylinder you could try adjusting the rod in the servo.

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Posted 17th Dec 2012 at 10:03
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eddy_gti6

Seasoned Pro

Location: Durham

Registered: 20 Oct 2008

Posts: 8,716

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Post #12
jorg wrote:
If you swopped the master cylinder you could try adjusting the rod in the servo.


How do you do that?

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Posted 17th Dec 2012 at 10:35
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jorg

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Location: Wallasey

Registered: 10 Jun 2007

Posts: 816

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Post #13
I had a similair issue when I swopped the calipers and master cylinder on the 205 I had. Have a look at the link below:

http://forum.205gtidrivers.com/index.php?showtopic=78005

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Posted 17th Dec 2012 at 10:40
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rikky 🦔

Location: cheshire

Registered: 28 Feb 2004

Posts: 26,796

Status: Offline
Post #14
i put a gti6 mc on my 205 servo. can't see why people on the 205 site don't use it, but nevertheless it wouldn't fit into the servo anyway due to the rod travel. wound it back in about 2mm and it fitted fine then. not sure on pedal travel though yet as there's no lines on the car but see no reason why i can't get it to work effectively by adjusting the rod. surely it just means i'd just be on max pedal travel a bit earlier?

*pedal btw Razz

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Posted 17th Dec 2012 at 10:46
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