About a week ago I replaced my clutch. One of the things I replaced was the pilot bearing. I got the old one out allright and installed the new one. But when installing it, I put a very slight dent in the far side of the dust cover. The guy working with me has a lot of experience working on cars ( works for the city). We looked at it and it wasn't damaged enough to prevent movement. It spun freely with no friction or rubbing. So we figured it was ok. I've been driving the truck a week so far and no problems at all. But that small voice in the back of my head says I should worry about it.
My attitude is hey- the truck is old as hell and the worst that could happen is that I'd have to maybe take it apart. In the meantime, just let it go cause its probably fine anway.