When you spin them by hand they kinda make that noise. They're noisy. But there's no way to tell if the pump is FUBAR without hooking it back up and running the engine. If it has 100,000 miles on it, I'd recommend replacing it regardless.
Thanks! I knew it had vanes inside but I wasn't sure if that scraping was them or not. I confess I didn't know how the pump worked. The rig has about 186k on it and this pump looks original. I'll test function when I put it back in. Thanks a lot for the help!