[200q20v] Help-UFO brake problems!
b.m.benz at prodigy.net
Fri Nov 17 17:00:21 EST 2000
Interesting! But further, Bentley, 46-10e, refers to an apparently even
earlier version, pre your #1 (maybe used on the '90 V8) that just used a hex
head bolt and, I suppose, without the locating washer. Thus, I would
further suppose that both the hex bolt and your #1 flat head screw types had
no counterbore in the hub around the threaded hole, inasmuch as apparently
they used no locating shoulder washer. Have you ever seen a hub with two
threaded locating holes, one counterbored and one not, as would be required
for total enterchangability?
I have Your #2 version with a counterbored locating hole in the hub, and
have not seen the others.
This is probably more that any of us want or need to know. More below.
> From: "SCALMANINI,STEVE (A-Sonoma,ex1)" <steve_scalmanini at agilent.com>
> Date: Fri, 17 Nov 2000 17:30:41 -0500
> To: 200q20V mailing list <200q20v at audifans.com>
> Subject: RE: [200q20v] Help-UFO brake problems!
> Just for the proverbial record, there are 3 versions:
> 1. the original style locating fastener hole (angled for
> a common ~4-5 mm flat-head screw)
> 2. the later style locating fastener hole (dual-diameter
> hole roughly the size of a lug bolt hole; dual-diameter
> meaning there's a step in the side of the hole)
As I recall, this version may appear to be a dual diameter hole when the
rotor is on the hub, but in actuallity is a single diameter thru hole in the
rotor and a smaller counter bored hole in the hub, thus accepting the
stepped shoulder washer to locate the two parts independent of the retaining
> 3. 1 & 2 combined.
> I've seen them all ways, ' promise, although most
> of the ones I've bought used (6) are the 3rd type,
> with both holes (ie, that's a total of 7 holes in
> the hub of the rotor: 5 for lug bolts and 2 for the
> 2 styles of mounting fasteners.)
> If you shop for used ones you need to know this. The
> the recyclers I've talked to don't ... even the Audi
> dedicated recyclers!
> I have P/Ns for the various styles at home somewhere
> but I'd have to dig to find them. ' sorry.
> -----Original Message-----
> ... there are two different non-interchangable versions,
> the break point being at VIN# -MN 005 557, the difference
> being the rotor to hub locating fastner.
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