It's hard to say exactly what it could be without hearing it myself. It could be lifter tick, sure. It could also be a small exhaust leak, it could be belts on the pully system. If you can isolate it to the valvetrain area under the valve covers, you might wheel it into the dealer to get a confirmation.
AirMech said:Hello,
Newmember here so please go easy. Just got my Titan last Friday and love the truck. My only concern at this point is that after 100miles I'm now hearing a ticking sound coming from the engine near where the valves and liftes should be. Saw on an earlier post that someone had mention the same noise, but nobody seemed to have an answer? If anyone could please enlighten me that would be most helpful. :computern