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You more than likely have a bad water pump. With the car running, open your radiator cap and see if the water is circulating through the radiator. If not, then your water pump is bad. Hope that helps...

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โˆ™ 2006-09-10 00:55:44
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Q: Why would a 1998 Pontiac Transport Montana over heat after the thermostat and coolant sensor has been changed?
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