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That white dust is the ally corroding away. I had the same problem on a customers RS2. You cant buy that metal peice, the calipers come complete. In the worst case, the brake pads stick in the caliper and can cause poor brake pedal feel, and also overheating of the pads/discs.
The best place to purchase these calipers is VAGparts, £235+VAT
sigpic
Tom C - www.rcmr.co.uk
Audi UR Quattro
Audi 100 C3 2.0 5 cyl 115ps
Audi S2 - 07k engine project aiming for 800ps
Audi B5 RS4 645ps 911nm
Hi!,
Not sure whether those plates are available from Audi, although they do appear to have a p/n: 8A0 698 430 & 8A0 698 430A. They are descriped as repair kit spring plate.
They may be obtained from a Porsche dealer as this is common on all the brembo calipers using that construction. Remember seing an article on how to correct it by removing the original plates (difficult as lots of heat was needed on the bolts that retain them), cleaning the corrosion out, and replacing the new plates.
Just need to know where Porsche sourced the calipers from. Not sure but I think it was the 968CS.
Good luck.
Hi!,
Not sure whether those plates are available from Audi, although they do appear to have a p/n: 8A0 698 430 & 8A0 698 430A. They are descriped as repair kit spring plate.
They may be obtained from a Porsche dealer as this is common on all the brembo calipers using that construction. Remember seing an article on how to correct it by removing the original plates (difficult as lots of heat was needed on the bolts that retain them), cleaning the corrosion out, and replacing the new plates.
Just need to know where Porsche sourced the calipers from. Not sure but I think it was the 968CS.
Good luck.
Porsche name is guide plates and audi repair kit spring plates.
Get them from audi dealer as they are same money , it will save you allot of agro .
_________
Rob
Dont know Robin, the screws are impossible to get out, they also corrode solid into the ally, you would need to split the caliper and drill them out!!
Tom,
Understood. Obviously if you can get the screws out then it is a cost effective solution. Depends upon how manky the calipers are in the first place I suppose.
Someone had tried to remove these screws before me and had rounded the small allen key hole out !! I managed to move a couple of them using a hammer and chisel, but the others were in there for good.
sigpic
Tom C - www.rcmr.co.uk
Audi UR Quattro
Audi 100 C3 2.0 5 cyl 115ps
Audi S2 - 07k engine project aiming for 800ps
Audi B5 RS4 645ps 911nm
Someone had tried to remove these screws before me and had rounded the small allen key hole out !! I managed to move a couple of them using a hammer and chisel, but the others were in there for good.
Tom,
I expect that would have been an Audi Specialist then!
Someone had tried to remove these screws before me and had rounded the small allen key hole out !! I managed to move a couple of them using a hammer and chisel, but the others were in there for good.
I had to do this used hammer/chisel/drill combination my self , it worked for 1 month and then I got the brake squeal so I got my self 322 with 993tt brakes.
______
Rob
I'm doing the fronts tomorrow. Is there anything else likely to be lurking in wait? Do the front callipers suffer the same way and is ir eally OK to machine old discs?
Sorted. Took a while but they feel most excellent once again. I got my spare wheel out for the first time ever to provide the pressure to bleed the brakes and found it has never been out the packet so to speak! The Dunlop & wheel are brand new with a pretty chunky tread which looks a bit like Yokohamas. Tyres are next on my agenda as I noticed the wear indicators looming while doing the brakes so bang goes the money saved by doing the work myself!
RSBLURS2, I've used GSF stuff for years and never had a problem with the quality of their kit, you could save a fortune going with standard kit. However, if you've got the cash for the big red upgrade then go for it. Give me shout if you need a hand, I've got full workshop facilities here (Strathaven) and it won't cost you a penny. Drive in/drive out, job done.
Cheers,
Graeme.
94 UrS4 Avant, slowly modding as we go. Now gone replaced with:
2001 S6 Avant, V8 works for me!
Thanks. I'll probably upgrade next time the discs & pads need replaced, probably 20000 miles. Is the upgrade only on the front or is there a back upgrade as well? I think it sounds too much trouble with no guarantee of success to replace the guide plates and if I need new callipers are required bigger is better, especially as standard ones will still cost.
Thanks for your post. I appreciate it. I've since found the plastic air guard inside the wheel is catching on full lock sometimes. I thought perhaps not enough air was getting to brakes causing overheating. My brake pads were new in Feb I think. Don't know what make but standard Audi/Porsche I imagine. Work done at QST. Cheers
Volcano black,134500 miles,standard,everyday transport, new rear discs, new door trims, replaced radiators x2, front/rear shocks(OE) + suspension bushes, recent alarm, undersealed, exhaust/head gasket, pulls like a train. big turbo whistle 315 hp
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