I just bought a 1999 LX with 101,000 miles on it. There are no records of when or if the timing belt was changed. How often is recommended or at what mileage do they usually break? Also I saw a list of Ford engines that are interference engines and the 1999 2.0 Ltr. DOHC was listed as one that if the timing belt breaks will cause major damage with valves hitting pistons. Is this true? I can't believe Ford would build another valve inference motor after all the problems they had with that on the early Escorts.