Ok, I did my '00 SI brakes a few weeks ago...took the car to autox event and car is working good.

Just started noticing a sound today while driving. Almost like something loose *clunk clunk clunk* and seems to be related to the speed of the tires rotating....almost like the sound when you have a flat tire. If I brake (or pull ebrake slightly), the sound goes away.

Since this happened while at work, I tried looking under, bouncing up and down on the back bumper (I'm sure it's the rear left making the sound), and also checked the lug nuts. I can't find anything loose visually.

Any ideas what the possibilities are?

 

that happend to my sentra, one of the capilar bolt worked its way out on the back

 

Good thing to check. That was one thing I was thinking about. I bought these and never thought about checking the caliper bolts before swapping it. :S stupid me...