2003 Nissan Xterra Timing Belt

Sorry to say the engine is an interference engine so there's going to be bent valves.

Don't know if you're referring to connecting rods or push rods, but you don't have to worry about those. Your engine doesn't use push rods, and it is very unlikely damage occurred to any pistons or connecting rods. Those are a real lot more beefy than the wimpy little valve stems.