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Gtir Motorsport club » Tech room » Help and Advice » brake pedal travel...

brake pedal travel...

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1 brake pedal travel... on 26th October 2016, 3:43 pm

Stu

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Advice needed.
While driving I could feel the foot pedal had dropped slightly. The travel was more.
When I parked up and then started the car again and drove off. When I pressed the brake pedal it was on the floor.
Pumped it and it came back up.
Got home and parked the car.
Went back out to it 30 minutes later and the pedal is at the top again and seams to be working as normal.
Would this be the master cylinder or brake servo?


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2 Re: brake pedal travel... on 26th October 2016, 5:32 pm

Mr B

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If really drop long way with hardly any pedal pressure then master cylinder probably, I've had one hit floor then recover after few pumps and it was down to age and fudged piston seals plus worked hard .
Worth doing basic mot style tests for servo booster and also check fluid and leaks .
the Blueprint ADN15127 is about £80 on ebay inc p&p , it straight fit and way go if got doubts as they all too old now want be messing with used plus this one has slightly bigger fluid displacement which useful if using 2 or 4 pots.
As it a big safety factor including keeping your R straight I don't mess about much on 25 year old brake system parts .

3 Re: brake pedal travel... on 26th October 2016, 5:37 pm

Mr B

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4 Re: brake pedal travel... on 26th October 2016, 7:02 pm

Stu

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Thanks B.
I replaced the servo not so long ago. I do have another good spare one.
I have a good master cylinder so im going to swap it over.
Just ordered a brake spanner so I can undo the brake pipes on the cylinder.


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5 Re: brake pedal travel... on 26th October 2016, 8:30 pm

gtir_woody

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Those spanners make life so much easier.

6 Re: brake pedal travel... on 26th October 2016, 9:17 pm

Stu

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Hopefully they arrive quick so I can get the job done.
The open end spanners are shit for the job.


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7 Re: brake pedal travel... on 26th October 2016, 9:20 pm

nomad

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Do you mean like these stu ???
http://www.ebay.co.uk/itm/201138066152


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8 Re: brake pedal travel... on 26th October 2016, 11:03 pm

Stu

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Yes Leighton.
I have only bought a 10mm one tho.


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9 Re: brake pedal travel... on 27th October 2016, 12:15 am

splmum

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Flare nut spanners are "the duck's nuts"

10 Re: brake pedal travel... on 27th October 2016, 6:55 am

nomad

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I cant say ive even seen some ducks nuts to compare them too ... Laughing


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11 Re: brake pedal travel... on 27th October 2016, 7:34 am

Mr B

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12 Re: brake pedal travel... on 27th October 2016, 8:18 am

mike74

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^^^ LOL!

13 Re: brake pedal travel... on 27th October 2016, 8:48 am

gtir_woody

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Mr B wrote:

goodpost

14 Re: brake pedal travel... on 27th October 2016, 12:25 pm

Stu

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Lmfao
You can trust in the knowledge that MrB knows about everything hahahaha class! Laughing


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15 Re: brake pedal travel... on 27th October 2016, 1:44 pm

nomad

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Thats ruined seasme street for me forever Laughing


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16 Re: brake pedal travel... on 27th October 2016, 2:46 pm

Mr B

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I know a lot about things with nuts lol
I'm going be checking out ducks know as want see a set for real .

17 Re: brake pedal travel... on 27th October 2016, 6:06 pm

nomad

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18 Re: brake pedal travel... on 27th October 2016, 6:31 pm

johnny gtir

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19 Re: brake pedal travel... on 28th October 2016, 1:03 am

Mr B

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Shut the duck up . lol
Anyway where were we ... Brake master cylinders, sorry stu :-)

20 Re: brake pedal travel... on 28th October 2016, 11:32 am

Mr B

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Blueprint master cylinder price has dropped to £64.64
Worth grabbing one for on shelf stock at that price as bloody cheap .

21 Re: brake pedal travel... on 28th October 2016, 11:35 am

Stu

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That is a good price B.

I have a spare one so will just use that.
I have spent to much on the car over the last few months lol


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22 Re: brake pedal travel... on 28th October 2016, 12:30 pm

Mr B

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^
I know what you mean stu .
least master cylinder easier than servo booster and make a change from water hoses & pumps lol . have fun fixing it .
Is good price that so worth someone buying a spare or 2 ...

23 Re: brake pedal travel... on 28th October 2016, 1:29 pm

Stu

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Mr B wrote:^
I know what you mean stu .
least master cylinder easier than servo booster and make a change from water hoses & pumps lol . have fun fixing it .
Is good price that so worth someone buying a spare or 2 ...
Yeah this is the easier one to do thankfully lol
I've had enough of repairs recently!
One day I might have a decent gtir haha


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24 Re: brake pedal travel... on 28th October 2016, 3:20 pm

Mr B

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^
yeh at age now most rubber related parts close to end due to material life cycle as well as wear .
It not so bad when can do it yourself & got some spares already, for those who got hire a wrench shop & buy parts it serious expense after expense .
Bit early in year for you as you prefer be out in december blizzards wrenching away, late october be like a seaside summer holiday for you haha .

25 Re: brake pedal travel... on 28th October 2016, 3:23 pm

Stu

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Mr B wrote:^
yeh at age now most rubber related parts close to end due to material life cycle as well as wear .
It not so bad when can do it yourself & got some spares already, for those who got hire a wrench shop & buy parts it serious expense after expense .
Bit early in year for you as you prefer be out in december blizzards wrenching away, late october be like a seaside summer holiday for you haha .
Lol yeah it is usually in the depths of winter when im stuck under the car haha
I have the evo brake conversion to install so may do that when the first snow fall has arrived Laughing


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