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Water not circulating through motor causing car to run hot

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How do you know the water is not circulating? could be thermostat or fan clutch could be slipping . also pressure cap could be loosing water back into jug .

Posted on Feb 18, 2012


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Water is not circulating through motor causing car to run hot

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Let the car run until it heats up then feel the upper and lower hoses on the radiator, they should both be hot and firm when the coolant is circulating. If the top is hot and the bottom is cool and pliable then you know the coolant isn't going through. The most common cause of this is a thermostat that isn't opening. Look to make sure the water pump is operating properly, that's what circulates the water through the motor.

If you suspect a leak then you need to find where it's coming from. Check around the head/intake gaskets for signs of leakage as well as around the side tanks on the radiator and all hoses and connections.

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