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Any experiences of Cam belt failure?

5K views 12 replies 7 participants last post by  Malcqv 
Busted Belts

As an automotive instructor at a community college, I have seen many broken timing belts, mostly on high mileage Japanese cars. Interestingly, most of those broke when the owner was trying to start the car. My best guess is that overnight, the belt developed a little slack in it, maybe because the engine rotated slightly backward when it was shut off. When the owner turned the key the next morning, the belt was shock loaded and broke off a couple of weak teeth, or the whole belt. And most of those had nasty oil leaks to degrade the belt. In many cases, that was the end of the car. -Steve
 
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