I've got a similar situation with my '97 integra, manual. I just got a new radiator a year ago and had the waterpump and timing belt changed at 190K miles. It's got 208K now. I just got an oil change last week and topped off the coolant which seemed low at the time. I drove it a few days and got the check engine light (code p0116) ECT - engine coolant temp. sensor, Auto Zone read the code, I took it back to Jiffy lube to see if they could find the leak because it was cold out. They confirmed the code and reset it. But they could not find a leak. I left it in the garage over the holiday weekend and found some coolant on the cardboard box I put on the floor under the engine when I drove it to work today. It doesn't seem like the heat is as strong as last year, so I'm going to take it to the place that put in the water pump, timing belt and radiator to check the core. I'll let you know what I find out. What ever happened with your sitch, Messiah62?