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 01-30-2013, 03:26 PM
SpencerBMW SpencerBMW is offline
Registered User
Location: Houston Tx
 
Join Date: Jan 2013
Posts: 7
Mein Auto: 2004 BMW 325i
04 BMW 325i OVERHEATING PROBLEM CANT SOLVE! HELP

I cant find out why my car is overheating. I have put new Water pump, Fan , Fan clutch, radiator, coolant reservoir tank. Im thinkn its the head gasket.
Earlier i drove the car to the bank & it started overheating , so i let it cool down opened the reservoir cap & it was EMPTY. So i filled it up , started the car & saw that water was leaking from somewhere under the intake manifold. i couldnt get an eye on where it was coming out from. CAN YALL HELP PLEASE BEFORE I SEND IT TO THE SHOP & THEY TELL ME A RIDICULOUS AMOUNT TO FIX THE CAR IF I COULD DO IT MYSELF.
Reply With Quote
Ads by Google
  #2  
Old 01-30-2013, 03:46 PM
ahull's Avatar
ahull ahull is online now
Officially Welcomed to the 'Fest
Location: Carolina
 
Join Date: Apr 2006
Posts: 3,308
Mein Auto: ist schnell! (03 330i SC)
in the vicinity of "under the intake manifold" you have the water control valve that routes hot water to your heater core for heat inside the car. If it's that or one of the hoses connected to it, should not be too expensive to fix - should be able to see by removing some of the intake tubing or maybe just looking around the tubing down by the drivers shock tower. The other items in that vicinity are some hard plastic tubes that come out of the engine that I think you have to remove the intake manifold to get to. Those could be big $$$ if that's it. Check to make sure the lower connection to the expansion tank isn't leaking first and squirting water in that direction.
Reply With Quote
  #3  
Old 01-30-2013, 03:49 PM
bmwoem1 bmwoem1 is offline
Regional Sponsor
Location: New York
 
Join Date: Jan 2013
Posts: 594
Mein Auto: X3
I didn't see thermostat in the replaced list... There are plastic coolant pipes underneath the intake that go to the heater core and aux water pump. If these plastic pipes are leaking, then the engine has been severely overheated and you most likely have a cylinder head issue. You can replace these plastic pipes and hope for the best....
Reply With Quote
  #4  
Old 01-30-2013, 03:51 PM
ahull's Avatar
ahull ahull is online now
Officially Welcomed to the 'Fest
Location: Carolina
 
Join Date: Apr 2006
Posts: 3,308
Mein Auto: ist schnell! (03 330i SC)
these are all the pieces I was talking about - look up your car for specific application , but I'd be surprised if they were different.

http://www.realoem.com/bmw/showparts...90&hg=64&fg=18
Reply With Quote
  #5  
Old 01-30-2013, 03:54 PM
ahull's Avatar
ahull ahull is online now
Officially Welcomed to the 'Fest
Location: Carolina
 
Join Date: Apr 2006
Posts: 3,308
Mein Auto: ist schnell! (03 330i SC)
could be one of these as well:

http://www.realoem.com/bmw/showparts...00&hg=11&fg=35
Reply With Quote
  #6  
Old 01-30-2013, 03:55 PM
Fast Bob's Avatar
Fast Bob Fast Bob is offline
Keeping it surreal
Location: Here, there, everywhere....
 
Join Date: Jun 2004
Posts: 34,253
Mein Auto: 2004 330Ci ZHP 3 pedals
Before attempting to get all bat-sh!t technical, do the simple things *first*, like bleed the system....it just might be air in the system....
__________________
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
  #7  
Old 01-30-2013, 04:19 PM
SpencerBMW SpencerBMW is offline
Registered User
Location: Houston Tx
 
Join Date: Jan 2013
Posts: 7
Mein Auto: 2004 BMW 325i
Quote:
Originally Posted by ahull View Post
these are all the pieces I was talking about - look up your car for specific application , but I'd be surprised if they were different.

http://www.realoem.com/bmw/showparts...90&hg=64&fg=18
So some reason the heater inlet pipe does have a nut on it. i have no clue why it doesnt but ill have to put one & see if that is why its overheating.
Reply With Quote
  #8  
Old 01-30-2013, 04:20 PM
SpencerBMW SpencerBMW is offline
Registered User
Location: Houston Tx
 
Join Date: Jan 2013
Posts: 7
Mein Auto: 2004 BMW 325i
Quote:
Originally Posted by Fast Bob View Post
Before attempting to get all bat-sh!t technical, do the simple things *first*, like bleed the system....it just might be air in the system....
I bleed the system everytime i open the radiator cap.
Reply With Quote
  #9  
Old 01-30-2013, 04:29 PM
Fast Bob's Avatar
Fast Bob Fast Bob is offline
Keeping it surreal
Location: Here, there, everywhere....
 
Join Date: Jun 2004
Posts: 34,253
Mein Auto: 2004 330Ci ZHP 3 pedals
Quote:
Originally Posted by SpencerBMW View Post
I bleed the system everytime i open the radiator cap.
Elaborate....
__________________
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
  #10  
Old 01-30-2013, 04:31 PM
GoForthFast GoForthFast is offline
Officially Welcomed to the 'Fest
Location: New York
 
Join Date: Jul 2004
Posts: 2,338
Mein Auto: '04 330Ci 6-speed
Quote:
Originally Posted by SpencerBMW View Post
I bleed the system everytime i open the radiator cap.
This makes little sense. You know it is unnecessary?
What exactly do you do and what motivates it?
Reply With Quote
  #11  
Old 01-30-2013, 04:51 PM
SpencerBMW SpencerBMW is offline
Registered User
Location: Houston Tx
 
Join Date: Jan 2013
Posts: 7
Mein Auto: 2004 BMW 325i
Quote:
Originally Posted by Fast Bob View Post
Elaborate....
Every morning before i drive the car , i check to see if it has water, & i always have to put water. & Someone from the autoparts told me that everytime i open the cap to put water to also bleed the system. So i open the cap , unscrew the bleeder screw , put anitfreeze , put both the screw & cap back on. Let the car warm up a lil , & i bleed it till there is no air in the system.
Reply With Quote
  #12  
Old 01-30-2013, 07:35 PM
halltristan's Avatar
halltristan halltristan is offline
Bimmer Enthusiast
Location: Tennessee
 
Join Date: Feb 2012
Posts: 652
Mein Auto: 325i and X3
Quote:
Originally Posted by SpencerBMW View Post
Every morning before i drive the car , i check to see if it has water, & i always have to put water. & Someone from the autoparts told me that everytime i open the cap to put water to also bleed the system. So i open the cap , unscrew the bleeder screw , put anitfreeze , put both the screw & cap back on. Let the car warm up a lil , & i bleed it till there is no air in the system.
Unless you're pouring a gallon of water in there's no need to bleed the system every time. if an autoparts store employee told you that he needs to find another job.
__________________

Member No. 470379
Reply With Quote
  #13  
Old 01-30-2013, 09:00 PM
Fast Bob's Avatar
Fast Bob Fast Bob is offline
Keeping it surreal
Location: Here, there, everywhere....
 
Join Date: Jun 2004
Posts: 34,253
Mein Auto: 2004 330Ci ZHP 3 pedals
Quote:
Originally Posted by halltristan View Post
Unless you're pouring a gallon of water in there's no need to bleed the system every time. if an autoparts store employee told you that he needs to find another job.
Agreed. Also, unless you have the heater going full blast, you`re not circulating the *entire* cooling system.
__________________
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
  #14  
Old 01-30-2013, 09:10 PM
SpencerBMW SpencerBMW is offline
Registered User
Location: Houston Tx
 
Join Date: Jan 2013
Posts: 7
Mein Auto: 2004 BMW 325i
Quote:
Originally Posted by halltristan View Post
Unless you're pouring a gallon of water in there's no need to bleed the system every time. if an autoparts store employee told you that he needs to find another job.
Well idk . I keep getting different answering from everybody. I just need some help trying to fix my overheating problem.
Reply With Quote
  #15  
Old 01-30-2013, 09:14 PM
heztheone heztheone is offline
Officially Welcomed to the 'Fest
Location: Lebanon (The Country)
 
Join Date: Oct 2009
Posts: 1,434
Mein Auto: 330i ZHP M/T
get a coolant system compression test done, that shouldn't be that expensive, right? (i'm a Non-US resident so don't know exactly how much that costs, over here it's for free)
it will pinpoint where's the leak is coming from, and go from there
__________________


Give a man a fish and you feed him for a day. Give a man a Chef and he feeds him for a lifetime
Reply With Quote
  #16  
Old 01-30-2013, 10:21 PM
Fast Bob's Avatar
Fast Bob Fast Bob is offline
Keeping it surreal
Location: Here, there, everywhere....
 
Join Date: Jun 2004
Posts: 34,253
Mein Auto: 2004 330Ci ZHP 3 pedals
Quote:
Originally Posted by SpencerBMW View Post
Well idk . I keep getting different answering from everybody. I just need some help trying to fix my overheating problem.
Look....you should always start with the basics, which means bleeding the system *correctly* and *thoroughly*, which I doubt was done yet....
__________________
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
  #17  
Old 01-31-2013, 10:18 AM
SpencerBMW SpencerBMW is offline
Registered User
Location: Houston Tx
 
Join Date: Jan 2013
Posts: 7
Mein Auto: 2004 BMW 325i
Quote:
Originally Posted by Fast Bob View Post
Look....you should always start with the basics, which means bleeding the system *correctly* and *thoroughly*, which I doubt was done yet....
I found where the coolant was leaking from , its coming from the Heater Intel Pipe , The o ring on it is bad most likely .
Reply With Quote
  #18  
Old 01-31-2013, 11:03 AM
SJBimmer's Avatar
SJBimmer SJBimmer is offline
Living Life At The Beach
Location: In This Place
 
Join Date: Feb 2007
Posts: 3,810
Mein Auto: 2004 325 Convertible
Quote:
Originally Posted by ahull View Post
in the vicinity of "under the intake manifold" you have the water control valve that routes hot water to your heater core for heat inside the car. If it's that or one of the hoses connected to it, should not be too expensive to fix - should be able to see by removing some of the intake tubing or maybe just looking around the tubing down by the drivers shock tower. The other items in that vicinity are some hard plastic tubes that come out of the engine that I think you have to remove the intake manifold to get to. Those could be big $$$ if that's it. Check to make sure the lower connection to the expansion tank isn't leaking first and squirting water in that direction.
Heater control valve is actually under the air filter housing on the drivers side of the car.
Reply With Quote
  #19  
Old 01-31-2013, 02:51 PM
ahull's Avatar
ahull ahull is online now
Officially Welcomed to the 'Fest
Location: Carolina
 
Join Date: Apr 2006
Posts: 3,308
Mein Auto: ist schnell! (03 330i SC)
Quote:
Originally Posted by SJBimmer View Post
Heater control valve is actually under the air filter housing on the drivers side of the car.
Yeah, I was thinking it was more under the intake boots, either way.... it's not far from intake mani. if it were to be leaking.
Reply With Quote
  #20  
Old 01-31-2013, 03:04 PM
SJBimmer's Avatar
SJBimmer SJBimmer is offline
Living Life At The Beach
Location: In This Place
 
Join Date: Feb 2007
Posts: 3,810
Mein Auto: 2004 325 Convertible
Quote:
Originally Posted by ahull View Post
Yeah, I was thinking it was more under the intake boots, either way.... it's not far from intake mani. if it were to be leaking.
I think you are more correct than I am. LOL It's mounted to the inner fender at the VERY back of the air filter housing, if not slightly behind. I only commented in case a noob was trying to find it at some point in the future.
Reply With Quote
  #21  
Old 01-31-2013, 03:44 PM
bmwmanz2 bmwmanz2 is offline
Registered User
Location: RDU
 
Join Date: Jan 2013
Posts: 78
Send a message via MSN to bmwmanz2 Send a message via Yahoo to bmwmanz2
Mein Auto: E39 528i
One way you can test the thermostat is to take some boiling water and dip your thermostat in the water to see if it opens up. Usually they have a predetermined temperature they open up at. This is usually from 188*-212*F. If it opens it will be ok. I it does nothing it may be stuck and need replacing. Thermostats are cheap. It probably isn't leaking from the thermostat housing or you would have said so. My bleeder screw cracked and caused mine to overheat. I replaced it with an aluminum one. As for overheating, I had a new water pump, bled all the air out, new thermostat, hoses were fine, radiator was good(no leaks or blockage), but my system was still overheating. I denied it being the head gasket. I read the codes and said cylinder 4&6 misfire. I threw some head gasket repair in there And it fixes it temporarily. From there I knew. I flushed everything and had a spare engine. I swapped ten out because I didn't have the $200+ for a head gasket and she has been running like a champ ever since.
__________________
-Tony
Reply With Quote
  #22  
Old 09-30-2013, 09:29 PM
bimmerus98 bimmerus98 is offline
Registered User
Location: califas
 
Join Date: Sep 2013
Posts: 1
Mein Auto: bmw
I have 2002 325i bmw n is getting overheating I replace the radiator, water pump, t-stat , temperature sensor and still getting overheating I don't know what to do ..is somebody can give me some idea to fix it before I take it to the mechanic. .thanx!

Last edited by bimmerus98; 09-30-2013 at 09:31 PM.
Reply With Quote
  #23  
Old 10-01-2013, 03:56 AM
ahull's Avatar
ahull ahull is online now
Officially Welcomed to the 'Fest
Location: Carolina
 
Join Date: Apr 2006
Posts: 3,308
Mein Auto: ist schnell! (03 330i SC)
Quote:
Originally Posted by bimmerus98 View Post
I have 2002 325i bmw n is getting overheating I replace the radiator, water pump, t-stat , temperature sensor and still getting overheating I don't know what to do ..is somebody can give me some idea to fix it before I take it to the mechanic. .thanx!
Proper bleeding of air from the system is essential. See the e46 wiki link near the top of the page for cooling system info, including bleeding procedure. Is the electric rad fan coming on when it starts to overheat? If not that may be your problem. Let it idle and open the hood to see if the fan comes on.

Other thoughts are a bad t-stat out of the box.
__________________
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
Reply With Quote
  #24  
Old 10-01-2013, 04:03 AM
ahull's Avatar
ahull ahull is online now
Officially Welcomed to the 'Fest
Location: Carolina
 
Join Date: Apr 2006
Posts: 3,308
Mein Auto: ist schnell! (03 330i SC)
^
__________________
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
Reply With Quote
Reply

Bookmarks

Tags
325i e46


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 02:27 AM.


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