I'm hearing some noise that sounds like ticking, it is independent of vehicle speed but directly affected by engine speed, so I think it is coming from a belt. It is loud enough to hear from the drivers seat while idling at a light and it is near the front of the engine bay too. I don't have an expert ear for this kind of stuff and it is hard to locate but I saw a thread for a different model year that mentioned timing belts should be replaced about 90k, does this apply to my 2000 Tacoma? Could this be making that noise?
I have not replaced any belts at all during the time I have owned the truck. I bought it about four years ago at 70k, it is now at 135k.
If I take it to a mechanic what would they check, and are those things I can check myself?