Thanks for reading this, but its kindof long. The GF has an 02 civic, completly stock, with 110K on it. Nothing major has ever been done to the car, just basic oil changes etc. Anyway, she wanted to get it serviced, and the dealer wanted about $3000 for the t-belt, and the 110K mile service... which seems sort of unreasonable. Anyway, she then noticed it got a bit warm while sitting in a drive thru, nothing major, just a couple of lines above where it normally sits. She found a local shop to do the timing belt, wp, and drive belts fairly cheap and she told them to install a t-stat as well. She got the car back and everything seemed ok for a few days, but after a long drive, while sitting in traffic, the temp went up again. The temps go back down when the car gets moving. I looked under the hood, and the t-stat had not been changed, and there was nothing on the reciept. When she called the shop back, they kindof gave her an attitude. I told her to just take it to the dealer and have the t-stat, fan switch in the t-stat housing cover, and get a drain and fill with genuine honda coolant (as we don't know what the shop used) She made an appointment and the car was great for a week until she took it in... They called her in a sad and slow voice... "Uh.. you have a bad head gasket or a cracked head, we recommend you not drive the car. We'll need it for a week and it will cost $1700." I went with her to pick up the car, I asked to speak with the tech, but he was "busy" and couldn't take 2 minutes as he was on a job he had to finish. They said that the pressure tested it and then ran a carbon monoxide test in the coolant, and it came back positive and there was a ton of carbon monixide in there. I really started questioning the service advisor that the coolant wasn't low, the car ran fine, and I wanted to know how much psi the tech shot the cooling system with. He coudln't answer any of my questions. He went back, talked with the tech andcame back to tell me that it looked like the shop that did the t-belt did a sloppy job, and it looked like collants were mixed. Any thoughts?? I cant see the HG being bad, unless the shop didn't bleed out the air after the WP. The car wouldn't run hot if the AC was running, but only stuck in traffic at times. Both fans kick on when the AC is on, and the normal fan does seem to cycle. She is going to keep a eye on the overflow tank, but it is very bad location. I have not checked to see if there are any bubbles comming out of the radiator. Thanks in advance for any replies.