Do it ASAP if you are below the 60k Powertrain warranty coverage. Go to the dealer and have them do a coolant pressure test to confirm the leak and likely headgasket replacement. This should allow you to get it covered under the manufacturers warranty. We had a cylinder 4 misfire occur at 58k miles (initial fix was spark plug coil packs) but issue continued until we brought it in at 62k after it ran completely out of coolant. Head Gaskets need replaced ($4200) and will take 2-3 weeks. We have to pay for it ourselves because I initially took it to a local repair shop rather than waiting 4-6 weeks to get it into Chrysler Dealer. Chrysler Cares and dealership will now not honor fixing it under the Powertrain warranty since we are 62k and not the original owners. I have filed a nhtsa report due to safety concerns with the engine.How did you approach the dealer about the problems? Did you have any knowledge of this problem before hand or just let them deal with it. I am a bit low on coolant and experiencing a rough idle at times and I'm at 55k miles... so I am fearing the worst. I plan on making my first contact with a dealer soon to see if I can at least get something documented.