[urq] urq Digest, Vol 71, Issue 9

[fdekat]

> ------------------------------
> 
> Message: 6
> Date: Tue, 8 Sep 2009 20:02:53 -0700
> From: AF <afinn1 at gmail.com>
> Subject: [urq]  2b relocate Alternator 'Siren' Noise?
> To: brogers at terrix.com
> Cc: urq <urq at audifans.com>
> Message-ID:
> 	<ed47d8be0909082002l25b0a044w240c9a9e7b8568d0 at mail.gmail.com>
> Content-Type: text/plain; charset=ISO-8859-1
> 
> I used both the 4000Q alternator and the stock UrQ closed face alternator >
on my MC motor and both made the siren noise. I assumed it was related to >
the fact that the belt was at a slightly skewed angle with the relocation
> bracket installed.
> 
> Andrew Finney
> 1985 UrQ 4.2L

Well, it still makes the noise. But I've got as far a proving it's related to
airflow 'somehow'. If I cover the back of the alternator with a gloved hand
(bloacking the air intakes), it drastically reduces the noise.

Problem is, you can't block the cooling airflow. 

And leads to the question: Why the noise when the alternator is on the left
(in a similar position as the stock alternator on a 4kq), but no noise from
the 4kq..?

=Frank de Kat=