Sorry for the long text but thanks in advance for anyone who reads through and attempts help.

First off I have a 2008 Dodge Charger 2.7 L V6
5 days ago my car was Idling with the A/C on when I heard coolant bubbling over into the reservoir. I immediately shut the engine off due to the heat getting close to the redline. I waited for it to cool down to make the 3 mile drive back to my house but when I tried it would begin over heat within seconds of me putting it into drive. Hours later, I refilled the coolant, (which was very very low) & checked all my hoses which looked fine. When I had my car Idling, my engine would maintain temperature, however when I turned the heater on it was still somewhat cold air even with the engine warm. When I shifted it into drive it would start overheating within a minute.

Next I did a compression test to see if I blew a head gasket. My results were: 155 165 150 175 160 170. My oil looks fine, exhaust looks normal smells normal and my spark plugs all looked the same so I am confident it isn't that.

Finally I drained all the coolant and replaced my thermostat. When I pulled the old thermostat out it wouldn't open with heat so I thought I solved the problem. Unfortunately after I placed the new one in, I have the exact same issue:

Car will maintain temperature while idling. Heater does not give any heat. Once the engine is warm and I'm in drive I have about a minute before the engine starts to overheat and my coolant boils over into my reservoir.
I felt the bottom hose going into the radiator and it's cold, like there's no flow of coolant going into the radiator.

Thanks again for any feedback.

 

Try flushing your cooling system really good then put in new coolantmaking sure you get all air out of system