[V8] Speaking of battery charging...

[dsaad at icehouse.net]

Unless the A8 battery was a huge amount bigger in amperage capacity, I doubt
that had anything to do with this. A bigger battery needs a bigger alternator,
but the V8 already takes a pretty good sized battery. You would have had to move
up to a diesel sized battery to cause a problem I would say.

After the speil on quality and good parts, bla bla bla, it is always possible
that something has failed - for whatever reason. If you can get the alternator
out and have it tested, you eliminate that variable. You can do an OK job of
testing in the car, but to really ring it out you need to let the Bosch guy have
another look at it. (I assume they have a good off-vehicle tester)

The cylinder thing is probably (as in 99.98%) a noise suppression capacitor. If
it was shorted you would probably only see a black spot where it used to be. You
can take it off for testing purposes and probably will not notice any ill
effects but you might get some alternator whine in the radio. The only other
thing it could be is a huge diode - also for noise suppression, but I doubt it
is. I have looked at mine, but it was long enough ago that I can not positively
remember.

Dave

Quoting "Coleman, David" <David.Coleman at blackrock.com>:

> This alt was rebuilt by a bosch place one year ago, after the same symptoms
> occured. Car was driven somewhat infrequently since, and I replaced the
> battery at the same time (w/ incorrect A8 battery).
>
> So now I am doing some prelim checking, but expect to find a bad volt reg or
> brushes.
>
> From the alt there is a brown wire (ground) and a red wire, both going to a
> black cylindrical thing mounted to the r/f frame rail. That cylinder also has
> a hole next to where the wires go into it. Can anyone enlighten me as to what
> this piece is?  The wire diagram makes no reference to it. I presume the VR
> is behind the alt cover...
>
> Thanks all!
>
> DC
>
>
> --------------------------
> David A. Coleman
> BlackRock
> Sent via BlackBerry Wireless
>
>
> -----Original Message-----
> From: v8-bounces at audifans.com
> To: v8 at audifans.com
> Sent: Mon Jan 16 17:06:46 2006
> Subject: Re: [V8] Speaking of battery charging...
>
> Have you already bought a replacement alternator?
>
> If not, and if you were me, you would remove the alternator and bring it to
> a
> shop that does rebuilds on these things. They will be able to get you back
> up
> and running for under $100 - and that is with a new regulator and bearings -
> and
> of course assuming the rotor/diodes/windings are all OK. Most likely they
> will
> also use better quality parts.
>
> As far as I know, this is the same alternator used in most/all Audis of this
> size and  vintage. There may be some case differences but the guts are
> pretty
> available.
> Remember even the Audi 100 had all of the same electrical goodies as the V8
> -
> and therfore had to have a similarly rated alternator.
>
>
> Dave
>
> Quoting "Coleman, David" <David.Coleman at blackrock.com>:
>
> > I swear these cars read this list...
> >
> > Can anyone enlighten me on how to identify which alternator I have on my
> > car?  My local repair shop shows two versions:  a 110-amp and a
> > "something else".
> >
> > My battery warning display and ABS light came on simultaneously
> > yesterday; I was 30 miles from home and made it as far as possible, but
> > in the end I had a buddy run me up a battery and jumper cables for a
> > quick get-me-home fix.   New alternator is showing up as big $dukkets,
> > so I'm looking at a new voltage regulator and brushes for this one.
> >
> > Any help would be appreciated!
> >
> > David Coleman
> >
> >
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