I just got done replacing the clutch in my 87 chevy. I hadn't been quite sure what was wrong with the clutch, the problem was that even thought I could see the clutch fork moving, and it felt like normal, the clutch was not disengaging.
Man, was In for a shock when I took the bellhousing and pressure plate off. I had a vision in my head of all of the material being worn off one side of the clutch and the rivets having dug into the flywheel/pressure plate and being jammed so hard I was going to have to grind it off...
Well, what actually happened was the center of the clutch plate cracked, allowing one of the springs to spring out. It had jammed between the clutch and one of the flywheel bolts. In fact, it had kindof hooked over the flywheel bolt.
Amazingly, there wasn't a scratch on the flywheel mating surface, only a small scuff around the one bolt, and the pressure plate was undamaged as well. I got a new clutch disk, and now, it works fine again.
Unfortunately, there was a core on the clutch disk, and I didn't think of taking a picture before I handed it over to the parts store.
Anyway, I was more than a little surprised to see that only the disk was damaged, especially considering how messed up it was.
The only thing was, I wonder how this happened. Has anyone else seen a clutch fail in this manner?