ok heres the story i took it in for overheating problems. they could not find anything wrong with it. that nite i parked it and the next morning there was a big puddle of antifreeze. the dealership said it was just an air pocket. 1 week later i was on the freeway and smoke was flowing out of my hood.when i got home i popped the hood and there was a really loud ticking noise from both valve covers. all my fluid levels are fine and no codes are popping up. wat could this be. the dealership says my car is fine. oh p.s. its an 01 v8 with 70000 miles