When should I change my timing belt?

I have a 2003 Lexus IS 300 with 98000 miles. The owners manual says to change the timing belt at 90000, but it runs fine now.When should I change my timing belt?You should change it within the next 10,000 miles. It is only for precaution. The timing belt gives no warning before it breaks, and it is under the engine cover so it cant be inspected (like the outer belts) when you have your oil changed . Also, when you replace the timing belt, have the mechanic look at the water pump, tensioner and idler pulley, and the front crankshaft oil seal, the camshaft seals, and the outer belt. This is the best time for the mechanic to change these items while the front of the engine is apart. If the idler pulleys are making a noise now they will not last until your next timing belt. They will seize and cause the belt to break. Most of the time they are fine with this many miles. There will be very little additional labor to replace these while the timing belt is out.When should I change my timing belt?Definitely, change it. The engine may run fine, but you don't know what condition the belt is in. If it breaks somewhere on the road, your car will be completely disabled.When should I change my timing belt?If the manual recommends that it needs changing then have it done immediately because if it goes it will cost you a lot of money, ie, a new engine.... Then you would be left kicking yourself for not getting it done before and i%26quot;m sure you wouldn%26quot;t want thatWhen should I change my timing belt?when you hear itWhen should I change my timing belt?Change it now. Of course it runs fine. Either it runs fine or you can't run it at all. Besides, you replace the timing belt only two or three times in the car's lifetime. If it breaks, you'll have a huge headache, as you'll be without the car for a couple days and you'll be out over $1000. Because if it breaks, the mechanic will have to replace the resulting bent valves and other parts of the engine.When should I change my timing belt?I would change it now. If it breaks, it could destroy the engine.When should I change my timing belt?Definitely change it ASAP. You have an interference type engine. If your belt breaks, your engine is shot. You might want to replace the tensioner and the water pump while you're at it.