What is the cause of overheating with my BMW 5 series car?

5 Responses to “What is the cause of overheating with my BMW 5 series car?”

1. 

   demonic says:

   February 22, 2010 at 11:33 pm

   the water pump

   coolant leak

   cooling fans not working
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2. 

   tn rebel says:

   February 22, 2010 at 11:53 pm

   not enough coolent in it or like he said the fan is broke or u hav a leak
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3. 

   stop_lyin says:

   February 23, 2010 at 12:12 am

   1. water pump
   2. leaky hose
   3.thermastat stuck
   4. radiator clogged
   look for leaks first..then change thermastat..try the cheapest way first
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4. 

   randynbear says:

   February 23, 2010 at 12:54 am

   1. water pump
   2. leaky hose
   3.thermastat stuck
   4. radiator clogged
   5. cracked engine block or faulty freeze plug (s)
   *And the number1 most overlooked cause is:
   6. Check the timing as a few degrees off on a precision engine will cause overheating with in a very short distance.
   References :
5. 

   Tom-SJ says:

   February 23, 2010 at 1:15 am

   You didn’t mention the year or engine of your car, but I have heard that the e39 model (3-series, ~1992 thru 1998) used a plastic impeller in the factory water pump — and the impeller would eventually fail due to age or temperature, and basically stop pumping water.

   You might pursue that as a possibility because the 3-series 6 cylinder engines were also used in the the 5-series for those years.
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