I was positive it wasn't going through the engine based on how well it ran. Here is what I found and I expect this may be the case for several that are having a hard time figuring out where the Eclipse leak is.
I jacked up the car and there was always a drop of antifreeze on the bottom of the radiator. The radiator was new, so I did not suspect it. The leak appeared around the bottom hose (why I tried new hose and clamps after the new radiator). Upon inspection, I could see a very slight sediment trail from the top-side of the bottom hose. I now suspected that the new radiator might have a leak. When I removed the radiator and inspected further, the factory compression tabs that seal the plastic radiator bottom resivoir to the cooling tubes assembly were not bent over at the bottom port. I then took a pair of vice grips and bent over 4 of 5 tabs that were possible to bend over. There has not been any leak anywhere at this point, but I expect that the others having a problem may have the same issue. It appears that as the engine heats up it initially draws in some air, then as the pressure builds, it pours out. When I would park, there would be next to zero sign of the leak other than a drop or two.
Wednesday, April 8th, 2009 AT 7:16 PM