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Not sure what you mean by rodding the rad., but, if it were cleaned by a rad. shop and given the ok, then, has the water pump been changed, is there a blockage in the system, is there an air lock in the system? To release an air lock, bleed the system by the heater hose with the engine at operating temp. Does it over heat at idle, hiway speed, with the a/c on or off ?

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Q: What can cause a 2000 crown vic ex cop car to overheat after rodding the radiator and replacing the thermostat?
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Can muriatic acid be used to clean out a car radiator?

i used to work in a radiator shop back in the day and we put a radiator on a rotating machine and put muric acid in it and let it rotate for some time, then flushed it out and the radiator was totally clean, no more rodding. they were copper then. not sure about todays alum radiators


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