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Model specific boards => Golf mk4 => Topic started by: Paddymk4gti on 06 October 2014, 16:58

Title: Need some advice please Mk4 gti brakes!!
Post by: Paddymk4gti on 06 October 2014, 16:58
Hey guys, so the other day I fitted a full set of MTEC drilled and grooved discs and some mintex pads, I brought the car for a drive and the pedal feels very spongy and the car takes a mile to stop!!!! I didn't disconnect any lines or anything so I don't know?? Also the ABS and Traction lights came on and are staying on!! I have driven the car about 10 miles as I thought maybe they need to bed in or something but its not improving at all!! I'm no mechanic by any means but I have a good idea..  Any ideas what could be going on??
Title: Re: Need some advice please Mk4 gti brakes!!
Post by: matty james on 06 October 2014, 19:58
cant help you ,but remember reading a similar thread not so long ago .Have a look in the old threads  :smiley:
Title: Re: Need some advice please Mk4 gti brakes!!
Post by: Paddymk4gti on 06 October 2014, 20:22
ya I had a look around but couldn't see much about it.. Ill look again cheers.. I uploaded some pics aswell :wink:
Title: Re: Need some advice please Mk4 gti brakes!!
Post by: matty james on 06 October 2014, 21:19
cool m8 - someone in the know will answer u soon im sure  :whistle:
Title: Re: Need some advice please Mk4 gti brakes!!
Post by: MoMartin on 06 October 2014, 21:24
You check to see if the brake fluid lid had popped off? When you rewind the calipers the fluid gets pushed back into the bottle and can  overflow.
Title: Re: Need some advice please Mk4 gti brakes!!
Post by: Paddymk4gti on 06 October 2014, 22:10
I had the lid off the bottle during the whole job, (and all night) as I started late in the evening and finished the next morning.. I was thinking maybe leaving it open over night had something to do with it?? but then would this be connected the abs and traction light??
Title: Re: Need some advice please Mk4 gti brakes!!
Post by: viperjsy on 06 October 2014, 23:31
when I did mine I clamped the brake hose and opened the bleed nippel when I rewound the rear and the same when I pushed the front piston in
Title: Re: Need some advice please Mk4 gti brakes!!
Post by: Bellend on 07 October 2014, 10:01
when I did mine I clamped the brake hose and opened the bleed nippel when I rewound the rear and the same when I pushed the front piston in

You shouldn't do that, just push in job done.

Sounds like you have disturbed an ABS sensor.

Pads may well need bedding in a tad more. Did you open any bleed nipples?

Where are you located?
Title: Re: Need some advice please Mk4 gti brakes!!
Post by: viperjsy on 07 October 2014, 12:46
my brakes are working as thay should and no abs light on and no codes
Title: Re: Need some advice please Mk4 gti brakes!!
Post by: Bellend on 07 October 2014, 13:28
my brakes are working as thay should and no abs light on and no codes


OK but I've probably changed in excess of 200 sets of discs and pads and I haven't ever had an ABS light come on and I have never undone a bleed nipple to do the job.
Title: Re: Need some advice please Mk4 gti brakes!!
Post by: Dalo Harkin on 07 October 2014, 17:41
You need to give them a good 50-100 miles to bed in, disks normally have a coating on them that burns off when used.

did you use a rewind tool to push the piston back?
Title: Re: Need some advice please Mk4 gti brakes!!
Post by: Paddymk4gti on 07 October 2014, 22:20
Thanks for the replies.. So if it is an abs sensor will I have to buy a new one or could I just give it a clean or something?? I took it for another drive today and the brakes are starting to feel better.. The pedal is still very spongy!?!?
Title: Re: Need some advice please Mk4 gti brakes!!
Post by: Paddymk4gti on 07 October 2014, 22:29
You need to give them a good 50-100 miles to bed in, disks normally have a coating on them that burns off when used.

did you use a rewind tool to push the piston back?

Ya their slowly getting there.. I gave the discs a good clear with brake cleaner before I fit them, that's why I was surprised when the the car could just about stop. :undecided:

I used a g-clamp on the front and had to wind the back calibre in.