I have a 2000 Ford Escort zx2. I was doing 60 on the highway and I heard this wierd saw/grinding noise and I felt the car about to stop. When I pulled over I saw white smoke coming from under the hood and the car would not start up again. I haven't had any overheating problems but before I had intermittent battery light problems even after buying a new battery. Could this be a problem with my starter, timing belt or alternator. I recently had the serentine repositioned at Midas because the alternator was not charging the battery. I really hope it's not the engine. Any ideas?