It might actually have something to with MTX\ATX - with ATX you usually on lower RPM's so you might have less stress on waterpump.
I replaced mine just to be on a safe side.


Regards,
Kirill
98.5 Contour SE Silver Frost (powered by Duratec 2.5L)
Nakamichi CD-45Z -> Phoenix Gold XS4300 -> Infinity Kappa 693.3i
\_ Blaupunkt ODx694