Speaking of timing (cam) belts and chains, does anyone know which, if any, of the Focus engines are interference and which are non-interference?
In an interference engine, the pistons and valves share some of the same space, hopefully kept apart by the timing belt. In a non-interference engine, the pistons and valves do not share space, so a timing belt or chain failure can't result in a destroyed engine. Thus timely belt replacement is more crucial with an interference engine.
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-- Don