So let me get this right, you went into your dealership for, and agreed to several orders, one of which was an inspection that included the cooling system. Upon leaving the dealership, your check engine light came on, you went back into the service area, they checked your car, and they told you something was wrong with the cooling system, correct? My first response to the service manager, (you are speaking to him, right? Everyone else is just a middleman) after having an aneurism, would be to question the credibility of him and the entire dealership. You paid for a service that was not preformed properly at all; what is the probability that an entire inspection of any system was completed, given a clean bill of health, and before leaving the driveway "fell apart"? Possible, sure. Possible, but highly unlikely. I would urge him, if he has any interest in customer satisfaction at all, to agree to a complete repair of the cooling system free of charge. Why? He (the technician, that is) failed to perform the inspection that could have stranded you miles down the road; that is what an inspection is supposed to prevent in the first place! Good Luck, keep us informed.