Originally Posted by TerpsRED

is the clicking with or without the air conditioning on? could it be one of the belts with something stuck to it? or if it is more internal could it be one of the timing chains due to a loose tensioner? If the dealer can't diagnose it, start simple and external.

Maybe a loose engine cabin fan bumping against a shroud? Some thoughts to help find the cause. Good luck, let us know what you find.