When should I change my timing chain?

[brooksgnm]

Well that all depends, is it a bone stock daily driver, high or low miles, going to get a cam? Basically if it's just a daily driver don't worry too much about it until the motor goes south, but if you are going to modify at all, put it in when you do a cam swap. Don't be surprised if your old one has quite a bit of slack in it, it's not all that uncommon.