90Q water pump whine - tbelt is not overtight

[Huw Powell]

I agree with Tony - to me, at a distance, it sounds like the alternator 
belt.

Can you measure the voltage at the battery while the idle whine is 
present and then when it is revved up and goes away?

Huw

On 1/2/2013 1:08 PM, TonyEscobedo wrote:
> Car has been sitting for a while you said... Sounds like it's an accessory belt. A/C, power steering or alternator perhaps.
>
> On Jan 2, 2013, at 1:04 PM, <laraa at sympatico.ca> wrote:
>
>> Could it be that the water pump gear and the t-belt teeth are not of the
>
>> same profile ? round teeth vs square teeth ?
>>
>> Louis-Alain
>>
>>
>>
>> -----Message d'origine-----
>> De : quattro-bounces at audifans.com [mailto:quattro-bounces at audifans.com] De
>> la part de Radek
>> Envoyé : 31 décembre 2012 19:58
>> À : quattro at audifans.com
>> Objet : 90Q water pump whine - tbelt is not overtight
>>
>> Happy New Year to all Audifans and Quattroholics!
>>
>> After a long rest in the garage, my son's 1988 90Q is finally on the road.
>> Among other things, the T-belt was changed, together with water pump and the
>> relay roller.  The pump is a brand new Graaf.
>>
>> When the car was first started after the RR, the pump was making a
>> high-pitched noise, not too loud but quite pronounced.  I went back,
>> loosened the belt a bit so it can easily be twisted 90 deg. with two
>> fingers, but the whine is not going away.  It is only there at idle, when
>> the RPMs increase, it goes away.  I checked with a stethoscope and it's the
>> water pump, rather than the power steering pump right above that is making
>> the noise, unfortunately.
>>
>> Is there a chance that the pump will settle down, or should I replace it
>
>> right away?  I'm afraid of it seizing, with all the consequences.
>> Thanks.
>>
>> Radek.
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