ticking noises are something not to be messed with. you want to find the noise to at least know what it is. a ticking noise can be normal for some engines. for example, some hyundais (older ones) have a noisy EVAP purge valve. its right behind the intake manifold and clacks away all day just fine. noisy, but not a bad thing.
on the other hand a ticking noise can be a bearing starved of oil or some similar manufacturing defect. a defect that could rail the whole engine. i don't want to alarm you, that is rather unusual and not likely. but i think you can understand why i say its worth tracking down.
i second the above idea of having another dealer look at it. you have nothing to lose.
another option is to find it yourself. if you rev the engine in neutral can you still hear it? if not, it may be a suspension issue or even an issue with brakes. transmission is another slim possibility. if you can hear it while not moving, its definitely an issue with the engine. you can always get yourself a cheap mechanic's stethoscope, get someone to rev the engine till you hear it and isolate the location that way.
i'd recommend just turning the TB by hand, but as far as i understand the newer deigns are drive by wire so that may not be possible? either way, just a thought for you.