Dodge Repair Questions? Ask a Mechanic for Answers ASAP
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Does it overheat when going down the highway or only at slow speeds and stops?
What engine do you have?
I'm assuming it overheats at idle too? Thanks.
Check the temperature of the radiator across the core. Any distinct temperature difference indicates a clogged radiator. Based on symptom it sounds like you likely have a clogged radiator. But fact it ran good for a few days after having thermostat replaced tells me your head gasket could be leaking, pushing air into coolant. So so having thermostat replaced got all air out of system which is why it ran good for a few days but now air is back in system causing it to overheat. Check for air in coolant, if there then I'd recommend doing a block test which checks for exhaust gas in the cooling system. If no air in system and radiator doesn't seem to be clogged then I'd continue with replacing the secondary thermostat. Let me know if you have more questions, thanks.
It sounds more like a head gasket issue, next step is a block test which checks coolant for exhaust gas. Let me know how it goes or if you have more questions, thanks.
There shouldn't be any exhaust in coolant, at this point your only easy option would be some top shelf stop leak. If that doesn't help then you are looking at a head gasket problem. I would replace 2nd thermostat during head gasket replacement. Let me know if you have questions, thanks.