The Crossfire is one of few cars i owned which doesn't "tick" (so far ...). The worst i had was a 1989 Mitsubishi Colt 16V GTI. I did 200,000 km with "ticking" lifters. Never a problem beside the sound. But all mechs told me, it may happen but isn't bad at all. They told it has something to do with deposits because of unleaded fuel which sounds louder when cold. The procedure to remove the deposits were much to complex and expensive. And as long as it doesn't do any damage to other parts... So i've driven a ticking car during cold periods.