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X3 E83 (2004 - 2010)
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Old 11-14-2011, 11:17 AM
LEOT LEOT is offline
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Location: Pa
Join Date: Mar 2007
Posts: 13
Mein Auto: x-3
Overheating and no heat

2007 X-3 3.0. Noticed it took a long time for the heat to come on, once it came on it was fine the rest of the day, even if I shut the car off for long periods. Next morning same issue. Seemed like a thermostat was stuck? Then all of a sudden it got worse, the temp gauge would shoot up into the red, still no heat, then you could tell the thermostat would open because the temp would drop almost instantly to normal and the heat fan would come on (auto climate control) Fluid was good, no other work was done on the car recently that someone could have messed it up.

Just seemed so obvious it was a thermostat. Bought a new thermostat for $115!! and was a PIA to change, followed the procedure for bleeding the air out. Got in the car yesterday morning and tryed to let it warm up, no heat, but temperature at normal or slightly above. Drove 2 miles, temp shoots up to red, pull over for a few minutes, sudden drop in temp and the heat comes on..., runs fine the rest of the day and night. Sure seems like a thermostat sticking but I changed that!!

The fan on the radiator is coming on so thats ok, in fact it only really over heats when driving. It seems like it has to get very hot for the thermostat to open and let water into the heater. There is no heat in the car at all until the thermostat opens

I read thru many of the old postings but couldn't find the answer.

Any ideas...thanks
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Old 11-15-2011, 04:24 PM
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ngcreese ngcreese is offline
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Location: Annapolis, MD
Join Date: Jun 2010
Posts: 195
Mein Auto: '11 X3
Sounds like there may still be additional bleeding of the cooling system, to be done. I just had my other car, an e30 blead properly.... it took the mechanic two hours to really get it done right. I can only imagine how much more complicated it is for our more modern X3.

Before that, I had the same symptoms, no heat and engine overheating. (coolant not circulating properly due to air pockets in the system...).
'11 X3 xDrive35i -- Coded
'07 X3 3.0si -- Coded & Traded
'91 e30 325i -- Sold


Last edited by ngcreese; 11-16-2011 at 12:13 PM.
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Old 11-16-2011, 11:38 AM
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X3-terrestrial X3-terrestrial is online now
Location: N.Miss - Memphis,TN Area
Join Date: Aug 2008
Posts: 2,925
Mein Auto: '05 X3, '02 M3, '91 E30
What he said. You might still have some "air bubbles " in there.
"If everything seems under control, you're just not going fast enough"
-Mario Andretti.

River City Bimmers BMW CCA
2005 X3 3.0i ZPP, Htd seats, Htd strng, Black Sapphire on Terracotta.
2002 ///M3 Coupe, Steel Gray Metallic on black leather, HK, three pedals.
1991 E30 325ic, AW, Black Leather, Black top, Three Pedals.
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Old 11-21-2011, 08:18 AM
LEOT LEOT is offline
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Location: Pa
Join Date: Mar 2007
Posts: 13
Mein Auto: x-3

Bled the system according to advise on this forum. Changed the coolant temperature sensor...no change. If you read above I also changed the thermostat

Put my code reader on, although no lights on the car it is showing a P0597. Thermostat heater control circuit open? I really hate to take this to the dealer.

Any ideas?
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Old 11-27-2011, 06:34 PM
bmw90325 bmw90325 is offline
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Location: US
Join Date: Sep 2008
Posts: 8
Mein Auto: 325
I had the same symptoms and it turned out to be the water pump. I would notice that when driving, if the heat did not work in the cabin, the car would start to overheat if I kept driving. Then I'd turn it off and wait a few minutes then problem would be gone....cabin heat would work and car would not overheat. Since the water pump is electronic, every time you turn the ignition on the water pump starts working. This means there's more wear and tear on the pump than the car actually states mileage wise. Mine started having symptoms around 70k miles and at first I changed the water pump since I thought it was a stuck thermostat....which didn't work. You'll have to pull the thermostat again and the pump is right underneath.
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Old 12-29-2011, 07:58 AM
LEOT LEOT is offline
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Location: Pa
Join Date: Mar 2007
Posts: 13
Mein Auto: x-3
changed thermostat, sensor, and finally water pump. Was def the water pump. Seemed to work sporatically so I was sure it was a sticking thermostat or some type of sensor. Before changing I checked all the connections etc, only solution was new water pump!1
thanks for everyones help
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Old 12-07-2014, 08:58 AM
Ahmadahere Ahmadahere is offline
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Location: Peoria, IL
Join Date: Jan 2013
Posts: 6
Mein Auto: 2007 X3 (E83)
LEOT.. the only thing I don't like about your conclusion is that you had to re-prime the cooling system each time you changed each one of those items, and it is hard to say that the water pump was the cause because you may have had priming issues in between that you got better at addressing.
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