S4 / RS4 (B5 Platform) Discussion Discussion forum for the B5 Audi S4 & RS4 produced from 1998-2002

Has anyone had any trouble with Alcon rotors warping?

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Old 06-04-2007, 10:36 PM
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Default Yeah, Alex and I discussed it because he was having a similar problem ...

unfortunately Stasis doesn't have anything more agressive sourced. Seems like my only option would be to get a set of Hawk blues (HB105.620) for the B-type caliper and macine/cut the notches for the pins on the Mono 4 and then try cleaning the rotor with the custom fit blues. A PITA but cheaper than replacing brand new rotor rings.
I swear this is all from me half-heartedly bedding in the DS3000s before getting out on the track.
Old 06-05-2007, 03:35 AM
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Default It is possible to turn the rotors.

<center><img src="http://gallery.rennlist.com/albums/album514/AudiS4_5318a.jpg"></center><p>
If you cannot get them cleaned off then that's probably the better solution.

Stephen
Old 06-05-2007, 09:17 AM
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Default What did you do to turn them? Did you make jig to hold them? Hard bolt to remove the ...

float? or just tossed them on come what may?
Old 06-05-2007, 09:57 AM
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Default The machine was able to clamp on the hat...

and, as you can see from the photo, the cutter was able to get in right up against the hat. So really it is no different to any other rotor. The advantage of doing them on the hat is that you true them relative to the hat which is what is mounted on the wheel. So if there is any distortion in the hat this should take account of it. I found that my rotors were no longer true. But if you do later disassemble them you need to keep track of which way they went and reassemble them the same way.

The other way to true them would be to disassemble them and then have a machine shop skim the surface. The rotors without the hats should be absolutely flat and easy for anyone with the correct equipment to do.

I'd go the first route. It will be cheaper and easier to find people with the right equipment who can do it.

Stephen
Old 06-05-2007, 11:07 AM
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Thanks, I'll give it a shot if the Hawk blue plan doesn't work.
Old 06-08-2007, 09:01 AM
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Default Running cold Hawk Blues seems to have totally worked, grooved the rotors pretty good, but ...

looks like the pad deposition is gone. Now to find a road to rebed the street pads on. Thanks everyone for all the input.
Old 06-08-2007, 09:08 AM
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You can see why rotors don't last very long if you use the wrong temp pads. :-)
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