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Q:

timing belt on 2003 Ford Focus

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
are the timing chain and timing belt the same thing?
(1) Answer
A timing belt is made of rubber (similar to a vacuum cleaner belt, only bigger) and needs to be replaced as part of the maintenance of the vehicle. A timing chain is a metal chain (like a motorcycle/bicycle chain) and only needs replacement if the chain or other parts wear out.