This is on the 1993 Ford Escort that my brother-in-law owns, which used to belong to my brother. About two years ago (when my brother still owned it), when it had 112,000 miles, I replaced the timing belt and the waterpump (which had started to leak). The waterpump I used came from Autozone. Part of the waterpump is the timing belt tensioner. About 2 months ago it started making a tapping noise. Brother-in-law continued to drive it until the engine quit. He had it towed home and it sat for a month. My brother finally had time to look at it this weekend. He needed my breaker bar to undo the engine mount to remove the timing belt cover, so I came over with it. The first thing I saw, even before removing the timing belt cover, was that the backside of the timing belt was really chewed up. When we got the timing belt cover off, it became obvious that the quickest way to get the timing belt off was to cut it off. As soon as we cut the belt and removed it, the tensioner pulley on the waterpump fell off. I found a couple of bearings and pieces of metal that fell out along with it. The bottom of the timing belt where it was on the crankshaft pully was chewed down to the reinforcing cords. Apparently, the tensioner had locked up and prevented the belt from turning. The engine was still spinning so it chewed the belt. One new timing belt and waterpump later, the engine was running again. Thankfully, it is a non-interference engine. It now has 140,000 miles. I can't believe the Autozone waterpump/tensioner crapped out like that after only 30k miles. The belt is supposed to last 60k so you'd think the tensioner might be designed to last. It was a new waterpump, too, not a rebuilt.