Brake rotor resurfacing...

[Grant Lenahan]

because you remove too much material and make the rotor less able to  
absorb heat

The amount i removed was tiny

Grant
On Aug 19, 2009, at 8:04 PM, <louis-alain.richard at sympatico.ca> wrote:

> That’s what I think too, pad deposits or rust pits or uneven  
> surface roughness... Sure, a turning job would take care of that,  
> and is really not expensive.
>
> Why don’t I go to a brake shop and have them turned ?
>
> Because they are not very thick from the start, and wanted to keep  
> them as thick as possible. But it is indeed the normal procedure  
> for pulsating brakes, I know.
>
> Since I now have a dial gauge here (as Vittorio said, any problem  
> is just a good reason to get new tools...), I will surely check  
> runout first but I’m quite sure they are fine. They still look  
> perfect, surface is shiny, lip is minimal and not much rust overall.
>
> Last thing, maybe it’s the rear brakes : they are indeed older, and  
> not vented (so no turning possible).
>
> So, first check runout. Then buy a simple coarse foamy emery pad  
> and work them out. After, either have them turned or replaced.
>
> More to come !
>
> Louis-Alain
>
> De : Grant Lenahan [mailto:glenahan at vfemail.net]
> Envoyé : 19 août 2009 19:23
> À : audi at humanspeakers.com
> Cc : louis-alain.richard at sympatico.ca; urq at audifans.com;  
> quattro at audifans.com
> Objet : Re: Brake rotor resurfacing...
>
> My pulsing pedal problems have never turned out to be warpage.  
> Always pad deposits.
> I realize this violates long held "wisdom", but its becoming more  
> and more accepted. You can also go to stoptech's web page and see  
> what they have to say about it.
> Mis-diagnosed by audi many times, and under warranty, i was fine  
> with rotor replacement. Now, less so.
>
> Grant
> On Aug 19, 2009, at 5:32 PM, Huw Powell wrote:
>
>
>
>
> louis-alain.richard at sympatico.ca wrote:
> My 1983 urQuattro is back in function but since it sat unused for a  
> few
> months, now the front rotors (less than 2000 miles) are "spotted".  
> The brake
> pedal is pulsating a lot, even after a dozen high speed braking  
> exercises
> (with a long cooling period between each stop).
>
> If the pedal is pulsating, then surely the rotor(s) is unevenly
> thick/warped.  With sanding there's no way to make sure you are  
> removing
> the correct material, why not just take them to a mechanic and get  
> them
> run on a brake lathe?
>
> -- 
> Huw Powell
>
> http://www.humanspeakers.com/audi
>
> http://www.humanthoughts.org/
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>
>
>
>
> Grant Lenahan
> glenahan at vfemail.net
> (201) 602-4702 mobile
>
>
>
>
>



Grant Lenahan
glenahan at vfemail.net
(201) 602-4702 mobile