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Belt VS Chain isn't the isn't that much of an issue as long as the engine uses Non-interference valves. Belt or chain can fail on you if you don't keep up with the recommended service interval, and both can leave you on the side of the road. Chain is usually better, but can be as bad as belts on over head cam engines with complex chain paths .
What's worse is interference engines where when the timing linkage device snapps or jumps too many teeth, the pistons (which keep spinning longer) smack into the open valves....This often completely destroys an engine, and usually requires a new head, pistons and honing.
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