The temperature gauge was reading very hot after driving for 10 minutes. A bad coolant temperature sensor code was showing. I had already changed the thermostat hoping to fix the problem a month ago. I had it towed to the dealer and they said that coolant was all over in the engine because of a blown head gasket. But they don't want to fix the blown gasket, they want to replace the engine and charge labor for a grand total of $13000. Does this seem correct? Do dealerships stay away from major repairs and just replace engines? I have sourced another engine for $3500, but have no time to install it. Also have found a reputable mechanic that will rebuild my engine and install for $4790. Anyway, I'm having a bad day. Please let me know what an option may be for me or if you have had the same problem and how you figured it out. thanks.