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A bad thermostat, or in rare cases, a bad water pump.

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Q: What will cause the water to not flow freely and the car overheat?
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What else do you check after blocked hoses thermostat fans and radiator when your 1990 Honda Civic continues to overheat?

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If car still overheats after changing the thermostat the water pump the headgaskets and the radiator what else would cause it to overheat?

If car still overheats after changing the thermostat the water pump the headgaskets and the radiator what else would cause it to overheat? From what you describe it sounds like you might have an air lock in your cooling system. I would recommend that you bleed any and all air out of the cooling system. The bleeder valve is located on top of the engine. Once engine starts to overheat or when you can hear bubbling back into the overflow bottle, turn car off and open bleeder valve. If you see bubbling you have air in your system. Bleed the system a couple of times and see if this helps. ------------------------------------------------------------------------------------------------ if it still overheats after that like my BMW 318 does you could be looking at a crack in the engine as i think that's my next option but also check or renew your heater matrix and temp sensors and use a rad leak in your rad even though its a new one as the leak could be in the engine so might seal it

Related questions

Can a soft radiator hose cause a car to overheat?

it shouldn't matter if the hose is soft. as long as the hose allows coolant to flow freely, your fine. but, if your car is overheating, u might want to change the thermostat.


What can a air lock in your cooling system do?

It can prevent coolant flow, which can cause a catastrophic overheat.


Does clean water flow faster than dirty water?

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Will improper airflow cause the computer to overheat?

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Overheating is probably due to poor flow of cooling water.


What would cause a 1998 Crown Victoria to overheat when you turn on the air conditioning?

Air flow. Check the electric fan, check the coolant, and might be time to replace the rad. Does it overheat at idle, and/or on the hi-way?


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Normally gravity, but osmotic pressure can also cause water to flow.


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Check the lower intake gasket, or the thermostat...


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