If the car is still running hot after replacing the thermostat, then there are a few issues that you need to check. Is all the air bled out of the cooling system? Do you have a leak somewhere? Is the top hose and bottom hose both getting hot? Is the temp sensor working correctly (meaning the sensor says that your car is in the red, but really your car is not overheating at all). Is the cooling fan turning on? It has to be one of those that is causing the issue with the car overheating. Most of the time, its due to not bleeding the air out of the system, or the water pump not functioning correctly.
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