The idler that bolts right to the water pump, some go around and try and find a tap and tap it out, most do not come with that hole tapped.
My bolt was a cut self tapping bolt, what I took out of the pulley and what I put back in, just held straight and easy and threaded back in.
Changed my water pump in hotel parking lot.
I get hell from others here that say you have to tap the hole, but they evidently have not seen a self tapping bolt before.
Maybe my 04 is a super special that has the rare self tapping bolt from the factory.
OoOoOoOoOoOoOoOoOoOo

Didn't see anyone say anything about that bolt hole yet, letting you know, some freak out.
Really no big deal.