hello I'm new to this site. would like to thank all that give their support .I have a 2005chrystler 300 tauring edition ,just rebuilt engine with all new .car runs good on startup but overheats fans kick on about 220degrees ,bled system properly bottom hose now gets hot after proper bleeding but still overheating issue,do have bank 2 obd codes for o2 sensors before and after cat ,changed thermostat twice with spring facing block,new water pump new radiator ,some tell me there is a small passage in block before thermostat size of a pencil diameter can get clogged ,heater core hot ,I do notice drop in temp when I put heat on ,resevior backs up when engine hot ,any suggestions?