I have a 1993 240 that can't keep the AC belt in the pulleys when\nusing the AC. I installed a new belt a month ago when I thought the\nold one had broken (it was just gone!). It worked well with no AC on,\nbut it popped off on the way home on a hot day. I reinstalled it,\nmaking extra sure it had the proper tension, but it jumped off again.\nThe AC compressor sounds good and works fine - no indication it is\nseizing up. Has anyone else had this issue, or have any suggestions?\nThanks.