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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 06-24-2014, 02:34 PM
smiley198028@ smiley198028@ is offline
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Mein Auto: 99 bmw 328i
Exclamation need help quick - 99 bmw 328i overheating

Hello I have a question I have a 99 bmw 328i it keeps over heating I have burped the system just like I was told to find out that the fan in front of the radiator isn't working or coming on like it says. I have checked the fuses and checked the fan to make sure it isn't locked up. I would like to know how to test the fan myself. Any help would be greatly appreciated
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  #2  
Old 06-24-2014, 03:07 PM
smiley198028@ smiley198028@ is offline
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Mein Auto: 99 bmw 328i
Exclamation need help quick

I have a 99 bmw 328i it is overheating. I have bleed the system. I have turned the heat on and the car is still over heating. I have noticed the aux fan isnt coming on at all. The fan turns freely so I know its not locked up and I have checked all the fuses and none of them are blown. Please help
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  #3  
Old 06-25-2014, 06:40 AM
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tim330i tim330i is offline
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Welcome to Bimmerfest! I have merged your two questions into one thread and moved them to the E46 3 series forum. This is the forum for your chassis code, you'll get more help in here. Have you tried putting 12v to the fan directly to see if it is working? Or put a meter on the leads to see if power is getting to the fan? I would start with those two.

Tim
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Old 06-25-2014, 09:25 AM
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bluebee bluebee is offline
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Mein Auto: 02 BMW 525i M54 auto 130K
This was written for the E39, but we share engines, so it may help you as it contains MANY details about the I6 cooling system and how it operates!
- What is the temperature of the coolant & when the thermostat opens under normal conditions (1)
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Each repair should invariably add to our knowledge base by the process of inexorable incrementalism.
Your job, in return, is to read the suggested threads, where the best people will always add value to those threads, either by pictures or by descriptions, so the next person with the same problem stands on your shoulders.
See also: E39 Bestlinks & How to easily find what you need

Last edited by bluebee; 06-25-2014 at 09:26 AM.
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Old 06-25-2014, 11:53 AM
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ahull ahull is offline
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Quote:
Originally Posted by smiley198028@ View Post
Hello I have a question I have a 99 bmw 328i it keeps over heating I have burped the system just like I was told to find out that the fan in front of the radiator isn't working or coming on like it says. I have checked the fuses and checked the fan to make sure it isn't locked up. I would like to know how to test the fan myself. Any help would be greatly appreciated
You can try to run 12v to the fan directly. Usually when they go its the circuit/relay box on the fan itself and its not sold separately. Break out some Benjamins

There's also a temp sensor on the Lower rad hose that triggers the fan on high temp. Rarely fails but worth looking at.


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2003 330i TiAg Sport Pkg ~90k miles
DIY MODS: AA Stage I supercharger, Meyle HD FCAs w Powerflex CABs, Bilstein shocks, Meyle HD Rtabs, Angel Eyes, Clear Corners/Markers w/ LEDs, LED tails, ZHP rims, Akebono pads, AUX input
DIY E46 Merit Badges: Sunroof resurrection, CCV, OFHG, VCG w/ VANOS seals, DISA, Cooling Refresh I, steering giubo, window regs, Magnetic Infandibulator (see wiki)
DIY On deck: Rear Diff bushing. UUC SSK, clutch job eventually, Wavetrac LSD
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