GolfGTIforum.co.uk

Model specific boards => Golf mk4 => Topic started by: gti_shaun on 27 February 2010, 19:10

Title: weird brake fault HELP(pedal down to floor)
Post by: gti_shaun on 27 February 2010, 19:10
HI all, right when i have been on lock a few times say getting out of a parking space i set off then go to brake and the pedal goes to floor,them ok on second application, its like a front wheel bearing is calapsed and pushing the caliper back(check them)

its the same fault as this http://www.golfgtiforum.co.uk/index.php?topic=102205.0 (http://www.golfgtiforum.co.uk/index.php?topic=102205.0)

ive PM'd this guy, just waiting on reply, just wondered if anyone had this?
Title: Re: weird brake fault HELP(pedal down to floor)
Post by: meano73 on 27 February 2010, 20:11
HI all, right when i have been on lock a few times say getting out of a parking space i set off then go to brake and the pedal goes to floor,them ok on second application, its like a front wheel bearing is calapsed and pushing the caliper back(check them)

its the same fault as this http://www.golfgtiforum.co.uk/index.php?topic=102205.0 (http://www.golfgtiforum.co.uk/index.php?topic=102205.0)

ive PM'd this guy, just waiting on reply, just wondered if anyone had this?
allright mate.same thing has happened to me.cant remember wich lock i put on but its happened to me in the past but not recently.the noise is still there but the brake pedal thing hasnt happened for a while.not wheel bearings as had both of them replaced recently.hope you get to the bottom of it and if you do will you post it so others can see what was wrong.cheers.
Title: Re: weird brake fault HELP(pedal down to floor)
Post by: Wayne on 28 February 2010, 00:09
Master cylinder.
Title: Re: weird brake fault HELP(pedal down to floor)
Post by: richw911 on 28 February 2010, 10:58
Master cylinder.

Agree  :smiley:
Title: Re: weird brake fault HELP(pedal down to floor)
Post by: gti_shaun on 28 February 2010, 11:45
but why after being on lock, and whats the noise, (a knock like the other one who has the same fault)
Title: Re: weird brake fault HELP(pedal down to floor)
Post by: BaV on 28 February 2010, 12:44
Have you had your camblet done lately? What engine code do you have?  I would bet 90% it Wont be master cylinder.
Title: Re: weird brake fault HELP(pedal down to floor)
Post by: michaelnabbi on 28 February 2010, 17:04
you might find that you have a damaged flexi hose when you put it on a lock hose kinks and forces fluid back up to master cylinder 1 st push on the pedal re primes the caliper and second push is fine
Title: Re: weird brake fault HELP(pedal down to floor)
Post by: gti_shaun on 28 February 2010, 18:10
i have put the engine in(was a 2.0 8valve) and yeah i have done the cam belt why?
Title: Re: weird brake fault HELP(pedal down to floor)
Post by: BaV on 28 February 2010, 19:33
i have put the engine in(was a 2.0 8valve) and yeah i have done the cam belt why?

Ok not to worry then should be ok. 

On a lot of mk4 platform cars there is a brake hose that runs alongside the plastic cover that you have to remove to do the cambelt.  I have read lots of threads where people get there cambelt done and the garage bends the hose out of the way and forgets to bend it back where is should be resulting in intermittent brake failure untill the hose is bent back to where it should be.  I dont know too much about this but as said i have read it a few times now.  Apparently the master cylinders are bullet proof
Title: Re: weird brake fault HELP(pedal down to floor)
Post by: Matty-MK3 on 28 February 2010, 23:08
i have put the engine in(was a 2.0 8valve) and yeah i have done the cam belt why?

Ok not to worry then should be ok. 

On a lot of mk4 platform cars there is a brake hose that runs alongside the plastic cover that you have to remove to do the cambelt.  I have read lots of threads where people get there cambelt done and the garage bends the hose out of the way and forgets to bend it back where is should be resulting in intermittent brake failure untill the hose is bent back to where it should be.  I dont know too much about this but as said i have read it a few times now.  Apparently the master cylinders are bullet proof

This, check this, if not could well be Master Cylinder.
Title: Re: weird brake fault HELP(pedal down to floor)
Post by: dTEA on 01 March 2010, 09:02
i have put the engine in(was a 2.0 8valve) and yeah i have done the cam belt why?
Apparently the master cylinders are bullet proof
What makes you think that???
Title: Re: weird brake fault HELP(pedal down to floor)
Post by: BaV on 01 March 2010, 18:28
i have put the engine in(was a 2.0 8valve) and yeah i have done the cam belt why?
Apparently the master cylinders are bullet proof
What makes you think that???

Because when we changed Barry's brakes over he took his car to a normal backstreet garage to get his brakes bled.  They couldnt do it blaming it on a knackered master cylinder.  He rang round lots and lots of vag specialist garages and they all said that they are absolutely bullet proof and have never come across a knackered one and would put money on it not being the case, needless to say it wasnt it was just the fact the garage didnt no how to bleed the brakes properly.

Also im sure if this guys master cylinder was gone he wouldnt just have the problem a couple of times when on full lock like described
Title: Re: weird brake fault HELP(pedal down to floor)
Post by: gti_shaun on 01 March 2010, 18:57
I FOUND PROBLEM, i could not belive it when i saw it, i got chance to get it up on ramp with someone lock to locking it, it is the calaper(bolt on the pipe) hitting my anti roll bar drop link bolt, there for pushing the piston back.this is because i fitted ajustable drop links as my car it quite low and the drivers drive shaft used to hit the antiroll bar, im going to try a get some steering rack restrictors or shorter track rod arms, anyone know if these are made for the mk4, i know they used to be fitted to a ford ka if a the genuine ford bodykit was fitted to stop the wheels from scuffing.