Grinding Brakes

[Twin Dragons]

Hi guys, i hope somebody can help me

I seem to have some sort of Grinding noise coming from the brakes when i do heavy/harsh breaking. If i break normally everything is fine, no noise smooth braking. Yet as soon as i put my foot down at a fast speed it starts to grind badly like metal touching metel, even though break pads almost new. I dont know what the problem could be, will using Vag Com help me find out the problem, or is it straight to the dealership?


Any help appreciated
Thanks

 

[Aky]

how about rear pads?

 

[Twin Dragons]

They seem to be fine too, i'd say around 60%

 

[Clach]

Sounds like the calipers are not releasing.....

 

[Twin Dragons]

Can they be fixed or am i looking at new ones if thats what the problem is

 

[fingermouse]

edge of the discs, i.e a rust lip ???

when you fitted the new pads did they stick to the caliper pison. Mine did but ive never see this before in any other cars.

 

[Twin Dragons]

There's not much of a rust lip, initially i thought that it could be that too, but when i looked at it there's not much of a lip.
I dont think the calipers had any problems sticking when they were put on.

 

[fingermouse]

sorry i ment the back of the pad had a sticky pad on it, so the pad actually stook to the brake cylinder so when pressure is release I assume the pad is drawn away from the disc.

 

[Clach]

you can take them off...but, erm...when was the last time you had a fluid change...

 

[Twin Dragons]

you can take them off...but, erm...when was the last time you had a fluid change...

I changed my fluid about a month ago been running about 500 miles since change. I've only just realised the grind when i had to brake sharply. So i dont know if this was happening before for after fluid/pad change. The major thing i notice when it starts to grind is that the car feels like its skidding and the control seems to go untill it stops grinding, also the brakes feel extremly spongy, i mean not normal. I can almost put half the brake pedel down with a bit of force at standstill.

 

[Clach]

Maybe a airleak in the brake line...? Not sure, sorry mate, looks like a trip to a mechanics. Avoid Audi stealers if you can, a good independent should be able to sort you out...Not to serious I am sure.

 

[Twin Dragons]

Cheers Clach and all that tried, i thought i'd try here first, but a trip the mechanics it is, ill repost once the problem is resolved
Thanks again