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If your car overheats only when going slow is it likely the thermostat?
Wiki User
∙ 15y ago
The two most common things that will cause the overheating are a thermostat that is stuck in the closed position stuck and a bad radiator fan motor or sensor. Either can be checked easily. While the engine is cool, remove the radiator cap and then start the vehicle. Being careful not to get yourself or any of your clothes caught in any moving parts, look through the radiator neck opening to see if you can see water circulate after the engine warms up - the flow of the water is very noticeable. While you are watching for water to circulate, also keep an eye on the fan to see if it turns on. If you can see water circulate, the thermostat is ok - if not, replace the thermostat. If water circulates but the fan does not come on, either the fan motor or the sensor is faulty.
Wiki User
∙ 15y ago
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Try replacing the thermostat.
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What could cause a 1988 16v VW Golf GTI to overheat?
sounds to me like the thermostat has gone ... or possibly water pump failure (eg at 100K miles) or an oil problem. First check the coolant level. If it's at the proper level it is probably the thermostat It could be the thermostat, water pump, or even the radiator fan switch. If it only overheats when the car is driven at low speeds or in heavy traffic it might be the fan switch. If it overheats even when moving at a constant high rate of speed (over 45mph or so) then it is probably the water pump or thermostat.
1998 Seville STS with new raditor and Thermostat overheats after driving only 20 miles?
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How does a car still overheats when all of the fluid is not lost or leaking?
one reason being is the thermostat is not the right opening temperature another being your cooling fan is not working correctly so when you are sitting at a red light it will start to overheat your best bet is to try and change the thermostat for a new one which is only $4 at advance auto and see if that will do anything and make sure you flush out the coolant and put new in
