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Message: <blockquote data-quote="sakuraguy" data-source="post: 984665" data-attributes="member: 6441">Radiator OverheatingWhen a car overheats, it can be caused by any number of things that decreases the radiator’s and cooling system’s ability to absorb and expel heat. The typical causes of overheating are discussed in another article, but we’d like to address what can happen if you don’t remedy overheating as soon as possible.Heat always flows from a high temperature to a lower temperature so the only way to cool a radiator’s hot metal is to keep it in constant contact with cool liquid and cooler airflow. If the coolant cannot circulate or the fans can’t cool effectively, then temperatures will start to rise and the engine will begin to overheat.As the engine overheats, it will start to lose power as the combination of the heat and pressure exceed the fuel’s octane rating. If this problem isn’t remedied, then damage to the rings, pistons and bearings can occur.Overheating can also cause a blown head gasket because heat can make aluminum swell nearly three times as fast as cast iron. This level of stress can distort the head make it swell in the hotter areas. Most aluminum radiator heads will swell in the middle and this can actually crush the head gasket if it gets hot enough. This can ultimately cause seizure and breakage, which is why immediate care is needed if your radiator begins to overheat.If the radiator coolant’s temperature rises hot enough to boil then this may cause older hoses or the older radiator to burst as a result of the pressure. Pistons can then swell, scuff or even seize. If this happens, massive engine problems will be forthcoming. As well, a burst radiator will undoubtedly leak coolant everywhere…from the crankcase to the other engine components. If this happens, then additional coolant system and engine parts may need to be replaced.If your radiator warning light comes on or your gauge reads hot, this should never be ignored. In due time, often quickly, overheating will begin and bigger problems can soon arise. You can try a few things to reduce the heat in the engine (i.e. turning on your heater or pulling off to let the engine cool), but you need to see a radiator specialist as soon as possible.</blockquote>

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