My 2014 Chrysler 300 is making a ticking sound, like something is loose.

We aren't going to diagnosis an issue like this without looking at the car. If you want a second opinion you can use this link to find a shop near you. A blown head gasket usually causes smoke out of the tail pipe, an oil or coolant leak, misfiring, and many more major symptoms. https://repairpal.com/repair-shops Alex