Does this question/answer help you at all? Bottom line, if you don't trust the timing belt and you don't really know it's history, it's a much better proposition to replace the belt than to think you can discern whether a belt is good or not ... you just never know.

If you can do this yourself, the kit to replace the belt/water pump is far cheaper than a new engine. When you get it replaced, you are no longer guessing what's up with the belt, you know. Then you can assume it should last as you'd expect. My general rule of thumb is, unless it's a new car, I'll change the belt. Hasn't failed me yet.

Does this question/answer help you at all? Bottom line, if you don't trust the timing belt and you don't really know it's history, it's a much better proposition to replace the belt than to think you can discern whether a belt is good or not ... you just never know.

If you can do this yourself, the kit to replace the belt/water pump is far cheaper than a new engine. When you get it replaced, you are no longer guessing what's up with the belt, you know. Then you can assume it should last as you'd expect. My general rule of thumb is, unless it's a new car, I'll change the belt. Hasn't failed me yet.