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4 Posts
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. Unfortantly after I placed the new one in, I have the exact same issue:
Car will maintain temperature while idling. Heater does not give me much heat until I shift into drive. Once I'm in drive I have about a minute before the engine starts to overheat and my coolant boils over into my reservoir.
I checked the bleed valves on top of my engine coming from my radiator and it was mostly steam or a lot of bubbles coming out. Also, the radiator from felt cold to the touch despite my engine overheating. (I'm not sure if this is normal)
My question is, could this be caused by air still in my coolant system I need to flush out?
A blockage to the radiator?
or any other feedback would be extremely helpful
Thanks so much!


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. Unfortantly after I placed the new one in, I have the exact same issue:
Car will maintain temperature while idling. Heater does not give me much heat until I shift into drive. Once I'm in drive I have about a minute before the engine starts to overheat and my coolant boils over into my reservoir.
I checked the bleed valves on top of my engine coming from my radiator and it was mostly steam or a lot of bubbles coming out. Also, the radiator from felt cold to the touch despite my engine overheating. (I'm not sure if this is normal)
My question is, could this be caused by air still in my coolant system I need to flush out?
A blockage to the radiator?
or any other feedback would be extremely helpful
Thanks so much!