Those bolts don't bolt to the caliper, they bolt to the caliper bracket and the caliper is just riding on them, free floating. If the rotor weren't in the way you could actually slide the caliper off. If something is rubbing it's a piston issue or the calipers aren't floating like they should be. If those bolts don't get tight you may need to replace both the bolts and the caliper bracket. Sometimes the caliper doesn't get a good seal on the bolt (bad seals) and can rust in which case often the bolt and caliper are toast. Usually no way to fix it once they rust and get crappy.
Just noticed you were NT. I was speaking for the turbo cars but generally the statements above should still hold true. Past cars I've worked on both mitsu and non mitsu worked like this.
97 Tsi AWD
24 years of Mitsubishi
Last edited by pauleyman; 01-26-2013 at 04:41 PM.
Reason: Auto-merged with previous post to prevent "bumping" within a 24 hour period
Tips on avoiding the auto-merge feature - http://www.dsmtuners.com/forums/faq.php?faq=vb_faq#faq_bumping