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X3 E83 (2004 - 2010)
Talk about the E83 BMW X3 in this forum!

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  #1  
Old 12-12-2014, 06:11 PM
jomo60 jomo60 is offline
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Location: upstate NY
 
Join Date: Nov 2014
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Mein Auto: 07 X3, 95 Jaguar XJS Conv
water pump trouble?

Hi,
The other day while my wife was driving her car it started blowing cold air through the vents (instead of hot air) and the temp gauge went a bit over 3/4 of the way. She stopped the car, let it cool down and drove the remaining way home with the temp gauge in the middle as usual but she turned off the heat. In the morning I checked the coolant level, which was fine, and then took the car for a 10 minute drive. I turned on the heat which was blowing cold air (the car was cold as it sat over night) and as the temp gauge moved the air got hotter and hotter. A few minutes after the gauge reached half way the car started blowing cold air. For this whole outing (10 minutes) the temp gauge never went above 1/2 way. There is no coolant lose at all.
I am thinking that the water pump is going. What do you think? If it is the water pump what else should I replace?
Thanks,
Jomo
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  #2  
Old 12-12-2014, 06:13 PM
bluskye bluskye is offline
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Location: chicago
 
Join Date: Jul 2002
Posts: 795
Mein Auto: 2006 330i / 2007 X3
It is the water pump. The thermostat should be replaced with the water pump. N52 motor, the pump itself is not cheap. Sorry bud.

The engine is designed to limp along without damaging itself in the event of a cooling system failure, so you unlikely damaged the engine.
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  #3  
Old 12-12-2014, 06:24 PM
jomo60 jomo60 is offline
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Location: upstate NY
 
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Mein Auto: 07 X3, 95 Jaguar XJS Conv
Thanks for the reply. Yeah I know the pump is expensive.
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  #4  
Old 12-13-2014, 08:28 AM
smaglik smaglik is offline
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Location: Flagstaff, AZ
 
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Posts: 88
Mein Auto: 2007 X3, 2003 M3
Depending on your mileage, you should replace the thermostat and expansion bottle as well. I did the triad preemptively at 95k.
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2007 X3 6MT
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  #5  
Old 12-14-2014, 06:14 PM
PSUEng PSUEng is offline
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Location: SE
 
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Mein Auto: 2007 X3
Sounds like what happened my mine went in my 2007. Replace the thermostat "while their in there" since the pump has to come out to do the thermostat. I paid my indy shop $1000 to do both.
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  #6  
Old 12-16-2014, 03:22 PM
raaizin raaizin is offline
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Mein Auto: X3, A6, Maxima, Jetta
Quote:
Originally Posted by bluskye View Post

The engine is designed to limp along without damaging itself in the event of a cooling system failure, so you unlikely damaged the engine.

Please explain, This is my wifes car and pretty sure she never looks at the gauges. I am a little concerned if it fails she will cook the motor since she doesnt look at the gauges...
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