How long can a turkey gobble before you damage the water pump?

[Jonathan Monetti]

Since doing my timing belt job, I've only put about 250 miles on my coupe
(NG).  As the weather got warmer (and thus I drove it more), I noticed the
tell-tale 'gobble gobble' of a too-tight timing belt (as well as what
sounded like bearing noise from the water pump).  I got in there and
adjusted the tension pump per some crafty list archive suggestions, and the
gobble has largely gone away.  However, there is a still metallic sound
coming from the general area of the water pump (german-made unit I got from
blau). 
 
I guess "YMMV" the big caveat, but do you guys think I could have seriously
damaged my water pump in just a couple hundred miles of driving this way?
If not, what else might be the culprit.  I've been able to rule out the
power steering pump.  
 
TIA
Jonathan Monetti
'02 A4q 1.8t
'87.5 Coupe GT