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It depends on what kind and year car you have. If it has electric fans maybe the fans aren't coming on. If it doesn't have eclectic fans maybe the fan clutch is no good. Make sure all of the belts are tight.

You could have a bad head gasket. If it has iron heads you could have a cracked head. If it has aluminum heads you could have melted the heads. It could also be a bad intake manifold valleypan gasket.

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Q: Why would your car still overheat after getting a thermostat a radiator a sensor an oil change and a tune up?
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