Welcome to Bimmerfest -- The #1 Online Community for BMW related information! Please enjoy the discussion forums below and share your experiences with the 200,000 current, new and past BMW owners. The forums are broken out by car model and into other special interest sections such as BMW European Delivery and a special forum to voice your questions to the many BMW dealers on the site to assist our members!

Please follow the links below to help get you started!

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

Reply
 
Thread Tools Display Modes
  #1  
Old 03-20-2010, 10:25 PM
kyungminmin kyungminmin is offline
Registered User
Location: wyoming
 
Join Date: Mar 2010
Posts: 37
Mein Auto: dodge truck
electric cooling fan not running? help

well i did cooling system overhaul and replaced lot of parts but some how electric cooling fan dont come on when engine is normal or high temp? how can i tell its not burned up or how can i test this problem? i reall dont want to spend over 300 bucks for new fan.
Reply With Quote
Ads by Google
  #2  
Old 03-20-2010, 10:54 PM
Fast Bob's Avatar
Fast Bob Fast Bob is online now
Keeping it surreal
Location: Here, there, everywhere....
 
Join Date: Jun 2004
Posts: 34,278
Mein Auto: 2004 330Ci ZHP 3 pedals
Your thermoswitch is either bad or not functioning....
__________________
The road goes ever onward....
(R.I.P. Jever)

*Please support the Wounded Warrior Project*

When faced with choosing between two evils, always go with the one you`ve never tried before....
Reply With Quote
  #3  
Old 03-20-2010, 10:56 PM
Ryan M Ryan M is offline
Officially Welcomed to the 'Fest
Location: .
 
Join Date: Dec 2006
Posts: 5,287
Mein Auto: .
Unplug it and give it direct 12 volts. The fan should run. This will tell you if the motor works.
__________________
For Sale: M60B30 intake manifold, M50 intake manifold, 2.81 differential, new OEM upper control arm bushings, 8 M62 fuel injectors.
Reply With Quote
  #4  
Old 03-20-2010, 11:54 PM
kyungminmin kyungminmin is offline
Registered User
Location: wyoming
 
Join Date: Mar 2010
Posts: 37
Mein Auto: dodge truck
ok what color wires do i hook up where to test this? and i checked 50amp fues looked alright but had brown tint on both teeth.? and some one told me When AC is on electric cooling fan should always come on is this true???
Reply With Quote
  #5  
Old 03-21-2010, 12:50 AM
jcourcoul jcourcoul is offline
Supporter of Bimmer Lore
Location: Mexico
 
Join Date: Nov 2008
Posts: 5,192
Mein Auto: 2006 325Ci
No, only comes on when the coolant is too hot. If the belt/viscous clutch fan is moving enough air (assuming your car has auto transmission), electric fan won't run. See your "what's this wire for" thread for an explanation of the coolant temp sensor found in the radiator.
__________________

2006 325Ci
Reply With Quote
  #6  
Old 03-21-2010, 02:55 AM
kyungminmin kyungminmin is offline
Registered User
Location: wyoming
 
Join Date: Mar 2010
Posts: 37
Mein Auto: dodge truck
Quote:
Originally Posted by jcourcoul View Post
No, only comes on when the coolant is too hot. If the belt/viscous clutch fan is moving enough air (assuming your car has auto transmission), electric fan won't run. See your "what's this wire for" thread for an explanation of the coolant temp sensor found in the radiator.
well i did check coolant temp sensor it is pluged in (lower radiator hose) this little wire is on driver side by head light and dumper. and i do know electric cooling fan comes on when it gets hot. i did run the car almost to the red line on engine temp never came on. so i shut the car down to cool the engine because i didnt want to blow head gasket.
Reply With Quote
  #7  
Old 03-21-2010, 05:11 PM
kyungminmin kyungminmin is offline
Registered User
Location: wyoming
 
Join Date: Mar 2010
Posts: 37
Mein Auto: dodge truck
got it fixed thanks guys
Reply With Quote
  #8  
Old 03-21-2010, 07:45 PM
jcourcoul jcourcoul is offline
Supporter of Bimmer Lore
Location: Mexico
 
Join Date: Nov 2008
Posts: 5,192
Mein Auto: 2006 325Ci
Quote:
Originally Posted by kyungminmin View Post
got it fixed thanks guys
Responsible 'Festers report how it got fixed, so the next guy from Wyoming has less suffering...
__________________

2006 325Ci
Reply With Quote
  #9  
Old 03-21-2010, 08:03 PM
kyungminmin kyungminmin is offline
Registered User
Location: wyoming
 
Join Date: Mar 2010
Posts: 37
Mein Auto: dodge truck
haha sorry i am new guy to bimmerfest lol well i by passed heat sensor to test electric fan made sure it worked and it was also 2 speed fan one at idle and one at full speed. than i check the lower radiator temp sensor like u told me to after engine was at 200f it was cold Thermostat did not work so the heat sensor was reading cold because Thermostat never opened up so i have to order new Thermostat. so that was why fan never came on and didnt have good flow to radiator to get cooled and that is why i had heat problems. but i did learn lot from u all. thanks again
Reply With Quote
  #10  
Old 03-21-2010, 10:36 PM
jcourcoul jcourcoul is offline
Supporter of Bimmer Lore
Location: Mexico
 
Join Date: Nov 2008
Posts: 5,192
Mein Auto: 2006 325Ci
Hey, didn't you say in your other thread that you had gotten this car on the cheap cause of a blown head gasket and that a cooling system overhaul had been performed as part of getting it back to usable condition?

IIRC, the thermostat is one of the basic items to be changed in such an overhaul, so aren't you paying twice for the part?
__________________

2006 325Ci
Reply With Quote
  #11  
Old 03-22-2010, 12:01 AM
kyungminmin kyungminmin is offline
Registered User
Location: wyoming
 
Join Date: Mar 2010
Posts: 37
Mein Auto: dodge truck
Well this car was great deal because of the price and it came with tools and most of new cooling system parts still in boxes but it came with 2 thermostat open box so i just put one on when i was putting it back together. was not sure witch one was the new one. so ya lot a cooling system part was replace just Thermostat was open box and when i bought the car lot of the parts were just sitting in the trunk and found 2 Thermostat so got a try both before i buy another one and seller move out of state so i cant even return the new Thermostat for new one.
Reply With Quote
Reply

Bookmarks


Forum Navigation
Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 3 Series / 4 Series > E46 (1999 - 2006)
Today's Posts Search
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On



Forum Jump


All times are GMT -7. The time now is 12:59 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
© 2001-2011 performanceIX, Inc. All Rights Reserved .: guidelines .:. privacy .:. terms