Question about 1999 BMW 323 Series

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BMW overheating overheating and heating not working

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Many things could cause the overheating. broken water pump impeller, stuck thermostat, clogged radiator, inoperative cooling fan on the radiator.

i would first check to see if the cooling fan on the radiator is working. when it reaches operating temp (or surpasses it in your case), see if the fan attached to the radiator kicks on. if its not on, then either the fan has failed or the temp relay to kick on the fan has failed. also, make sure the connector is plugged in.

after its at operating temp, turn off the car and feel the radiator. if you feel cool spots, then it is clogged and needs replacing.

wile under the hood and car is off, feel the upper & lower radiator hoses. if one is hot and the other is cool, then either the water pump (actually the impeller on it) has failed and is not circulating coolant through the radiator. a common problem in this model.

but it could also be the thermostat. if failed, it would not allow coolant to flow & circulate.

hopefull one of the above items is the problem. good luck.

Posted on Mar 07, 2009

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Hello i was replaced my car's water pump and i start my car i was driving and i see my car has a over heat but i don't know what is a problem please i need help

Posted on Apr 02, 2010

  • cools_for_ev Apr 02, 2010

    hello i was replaced my car's water pump and i start my car i was driving and i see my car has a over heat but i don't know what is a problem please i need help

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