4th Dec 2013, 14:34
The belt is probably sitting crooked, or most likely, the alternator is not sitting evenly. Look at the belt from a side angle. If it is leaning back too far at either end, then the alternator may be sitting too far back or forward. Be sure the mounting bracket is correct and is not missing or adding anything. A missing alternator bracket spacer can cause the belt to run just a little uneven, and cause it to jump off the belt pulley. It doesn't need to be running to see an uneven belt line up.
4th Jun 2014, 14:32
It's your alternator pulley. Mine was 1/16 off until I found one in a bone yard that was the right pulley.
16th Jul 2014, 01:52
I have had the same problem with my '93 XR2. I took it into Ford to get a "Genuine" belt. Unfortunately, they don't make them any more, so everything now is after market. It also turns out that you need to order one size smaller than what is specified by Ford. The "correct" size was too big and quickly started squealing again. By stepping down a size, the adjustment range was more in the middle instead of at maximum, which was too loose. This lesson cost me $180.00, but hopefully it helps you.
7th Mar 2013, 15:33
I own a Capri also, and I went through 3 belts before we discovered that there's a problem with the alignment of the bolts on the alternator. After replacing a faulty bolt, my Capri has run perfectly ever since.