I've done alot of searching and have concluded that my heater core needs to be replaced. I am having the same issue as a few others where heat only blows out on the passenger side of the car. I've been having other coolant issues wich I'm not sure if they are related but need to get this fixed regardless. I've flushed the coolant multiple times and replaced the radiator (radiator was leaking and rust was in the system). I just changed the heater core on my brothers blazer with the help of some good directions and am hoping the eclipse won't be any more difficult. I haven't been able to find any directions on how to do this for the eclipse though. Are there bolts that need to be removed from the engine bay? Anything hidden or tips? Also, will the evaporator need to be removed? Any help or photos will be greatly appreciated.