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Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 3 Series / 4 Series > E46 (1999 - 2006)

E46 (1999 - 2006)
The fourth generation 3 Series (E46 chassis) was introduced in 1999 and set the standard for engineering and performance during it's years of production including being named to Car & Driver's 10 best list every one of those years! ! -- View the E46 Wiki

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  #1  
Old 03-08-2011, 06:20 PM
Jeffrey_104 Jeffrey_104 is offline
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Location: Honolulu, Hawaii
 
Join Date: Mar 2011
Posts: 1
Mein Auto: 2001 330ci
Question 2001 330ci Engine Temperature Problems

Aloha!

I was wondering if anyone could help me out with a problem I am going through currently with my 330ci.

When I'm stuck in traffic or moving stop and go at slower speeds, my engine temperature beings to climb. The needle never hits the red light for "max overheat" but it gets close. I am able to get it back to normal temp by turning on the heat to 91!! It is very unpleasant down here with the tropical heat in Hawaii.

Additionally, when I'm driving at higher speeds on the highway, I do not have any problems like this. Everything is 100% normal.

Any idea on what is going wrong with my car?

Thank you!
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  #2  
Old 03-08-2011, 07:31 PM
Y2K_Bimmer Y2K_Bimmer is offline
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Location: Glendale, AZ
 
Join Date: Mar 2011
Posts: 427
Mein Auto: 2000 323i
Is the coolant low? What have you checked?
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Old 03-09-2011, 02:54 AM
shanneba shanneba is offline
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Location: Indiana
 
Join Date: Jul 2005
Posts: 253
Mein Auto: 2003 330Ci
After confirming your coolant level is correct:
Does your electric fan turn on? It should spin for a few seconds when you start the car as a test of the motor.
Check to see that the motor spins manually (car off).

Disconnect the wire from temp sensor in the lower radiator hose, then start the engine. If the fan runs with the sensor disconnected, you probably have a bad sensor or wiring, a replacement sensor is about $25-30.
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