Does anyone know the reccomended mileage to change a timing belt for 1995 Lexus ES300 with a 3.0 v 6. The car has 147000 miles on it and I know the timing belt was changed in 2002 but have no idea of the mileage. The owner's manuel does not mention it for Schedule B maintinence and only states it should be inspected at 60000 for Schedule A maintinence, which is for severe service. How long do these things usually last and does any body know if this is an engine it will hurt if the timing belt breaks? Any info would be greatly appreciated.