My continuing saga - A couple of questions

[Grant Lenahan]

I'd have them spin all 4 wheels and tires on a hunter 9700 roadforce  
machine, and get the printout of the lateral and radial run-out for  
both the wheel and the tire.  No need to guess.

Grant
On Jul 21, 2008, at 1:11 PM, kentmclean at comcast.net wrote:

> Eric Langheinrich wrote:
>> First, the car has had a front end vibration that only shows up in  
>> a 5 mile
>> an hour range right about 50 MPH. So far, after more trips to the  
>> shop than
>> I can count, I've been told it's tires, bent rims, and now play in  
>> the inner
>> CV joints. Anyone had a similar symptom with play in the CV joint  
>> being the
>> cause?
>
> Since it's a dealer, have them swap another set of wheels/tires over
> to your car, just to see if the vibration goes away.  If it does,  
> it's wheels
> or tires (my guess would be a tire out of balance or out of  
> round).  If not,
> have them replace the CV joint, since they sold you a certified car  
> with
> a bad one.  If you still have the problem after that, take it to a  
> good
> independent shop, and send the repair bill to Audi. :)
>
>> When I get home at the end of the day
>> after my car has been sitting out in the sun, there is a faint  
>> noise from
>> the right rear (I hear it loudest in the wheel well) that sounds  
>> like a
>> muted version of the alarm going off.
>
> My guess: Fuel tanks will and build release pressure. When you fill  
> the
> tank, the fuel is at about 65F (being 10 or so feet underground).  
> As it
> warms up on an 80F day, the fuel expands. The air above it has to go
> somewhere, usually through a vent or charcoal canister.  Conversely,
> as you burn off a full tank (like on a long trip), you may hear a  
> hissing
> as you open the gas cap, due to a vacuum created by the no-longer-
> there fuel.
>
>> While trying to find the previous noise, Audi USA and the dealership
>> determined that the AMP is making a hissing noise.
>
> "They all do that." At least, as they age Audi's Bose amps seem to
> succumb to bad capacitors. Unless there is a recall on it, you're
> stuck.  Did they determine the AMP is making a hissing noise in
> the hope of selling you a new one? Or to let you know of a recall?
> Or because they're nice guys and they just wanted you to know
> about it?
>
> --
> Kent McLean
> '99 A4 Avant
> '91 200 20V Avant
> '94 100 Avant, now with SO's son
> '91 200 20V Avant, up in flames
> '89 200 10V sedan, up in smoke
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