E46 BMW Social Directory E46 FAQ 3-Series Discussion Forums BMW Photo Gallery BMW 3-Series Technical Information E46 Fanatics - The Ultimate BMW Resource BMW Vendors General E46 Forum The Tire Rack's Tire Wheel Forum Forced Induction Forum The Off-Topic The E46 BMW Showroom For Sale, For Trade or Wanting to Buy

Welcome to the E46Fanatics forums. E46Fanatics is the premiere website for BMW 3 series owners around the world with interactive forums, a geographical enthusiast directory, photo galleries, and technical information for BMW enthusiasts.

You are currently viewing our boards as a guest which gives you limited access to view most discussions and access our other features. By joining our free community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is fast, simple and absolutely free so please, join our community today!

If you have any problems with the registration process or your account login, please contact contact us.

Go Back   E46Fanatics > E46 BMW > E46 Xi Forum

E46 Xi Forum
The E46 XI was produced from 01-05 in sedan and touring body styles. Powered by either a 2.5L inline 6 in the 325xi or a 3.0L inline 6 330xi. Discuss all thing about BMW AWD E46 'Xi' here.

Reply
 
Thread Tools Search this Thread Rate Thread Display Modes
Old 11-16-2012, 07:02 AM   #1
akilism
Registered User
 
Join Date: Oct 2012
Location: Brooklyn
Posts: 7
My Ride: 325xit
2003 325xi leaking coolant

my 325xi just started leaking coolant massively the other night. I'm pretty sure its the expansion tank. I was under the car this morning and couldn't tell for sure though. I pour coolant in and it just pours back out of the bottom of the tank and not in a trickle its just flowing out.

video 1:

video 2:

I'd like to overhaul the cooling system but right now I can't even drive it anywhere so I was hoping to just replace the expansion tank asap if that looks like the culprit.

its all coming from here



Last edited by akilism; 11-16-2012 at 03:24 PM.
akilism is offline   Reply With Quote
Ads by Google

Guests, get your FREE E46Fanatics.com membership to remove this ad.
Old 11-16-2012, 07:11 AM   #2
Rickna
Registered User
 
Join Date: Nov 2008
Location: West Haven, CT, USA
Posts: 1,976
My Ride: '02 330xi AT
Send a message via ICQ to Rickna Send a message via AIM to Rickna Send a message via MSN to Rickna Send a message via Yahoo to Rickna
Might be time for a cooling system overhaul depending on the mileage.
__________________

238 years of democracy has died, and with thunderous applause

My_Mods_&_Stuff
Rickna is offline   Reply With Quote
Old 11-16-2012, 10:17 AM   #3
SamDoe1
Registered User
 
Join Date: Oct 2010
Location: Minnesnowta
Posts: 3,300
My Ride: Clubs baby seals
It's either the expansion tank or the radiator. Once you pull the tank out, you should be able to figure out where the leak is.

Probably stating the obvious but do NOT turn the car on in this condition.
SamDoe1 is offline   Reply With Quote
Old 11-16-2012, 11:32 AM   #4
akilism
Registered User
 
Join Date: Oct 2012
Location: Brooklyn
Posts: 7
My Ride: 325xit
it seems like its coming right out of the tank. like its not even flowing into the radiator at all.
akilism is offline   Reply With Quote
Old 11-19-2012, 09:16 AM   #5
STiGLiTZ
Registered User
 
Join Date: Oct 2012
Location: CT
Posts: 19
My Ride: 325i
Quote:
Originally Posted by akilism View Post
it seems like its coming right out of the tank. like its not even flowing into the radiator at all.
Possibly a bad thermostat causing the pressure back up, if its not able to close the loop and get back into the radiator.
STiGLiTZ is offline   Reply With Quote
Old 11-19-2012, 09:43 AM   #6
SamDoe1
Registered User
 
Join Date: Oct 2010
Location: Minnesnowta
Posts: 3,300
My Ride: Clubs baby seals
Quote:
Originally Posted by STiGLiTZ View Post
Possibly a bad thermostat causing the pressure back up, if its not able to close the loop and get back into the radiator.
The tstat won't block the flow of fluid if it fails.
SamDoe1 is offline   Reply With Quote
Old 11-19-2012, 09:45 AM   #7
Rickna
Registered User
 
Join Date: Nov 2008
Location: West Haven, CT, USA
Posts: 1,976
My Ride: '02 330xi AT
Send a message via ICQ to Rickna Send a message via AIM to Rickna Send a message via MSN to Rickna Send a message via Yahoo to Rickna
Quote:
Originally Posted by SamDoe1 View Post
The tstat won't block the flow of fluid if it fails.
+1 Every bad tstat I've seen was locked in the full open position.
__________________

238 years of democracy has died, and with thunderous applause

My_Mods_&_Stuff
Rickna is offline   Reply With Quote
Old 11-19-2012, 10:08 AM   #8
STiGLiTZ
Registered User
 
Join Date: Oct 2012
Location: CT
Posts: 19
My Ride: 325i
good to know, learned something new today
STiGLiTZ is offline   Reply With Quote
Old 11-19-2012, 12:22 PM   #9
akilism
Registered User
 
Join Date: Oct 2012
Location: Brooklyn
Posts: 7
My Ride: 325xit
got the expansion tank out on saturday. pretty good crack running down it. automatic transmission thermostat broke taking the tank out. so im just going to overhaul the cooling system this week.
akilism is offline   Reply With Quote
Old 11-19-2012, 12:34 PM   #10
Rickna
Registered User
 
Join Date: Nov 2008
Location: West Haven, CT, USA
Posts: 1,976
My Ride: '02 330xi AT
Send a message via ICQ to Rickna Send a message via AIM to Rickna Send a message via MSN to Rickna Send a message via Yahoo to Rickna
Quote:
Originally Posted by akilism View Post
got the expansion tank out on saturday. pretty good crack running down it. automatic transmission thermostat broke taking the tank out. so im just going to overhaul the cooling system this week.
Good plan.
__________________

238 years of democracy has died, and with thunderous applause

My_Mods_&_Stuff
Rickna is offline   Reply With Quote
Old 11-24-2012, 09:00 PM   #11
717bimmerboym3
Registered User
 
Join Date: Nov 2012
Location: lancaster, pa
Posts: 7
My Ride: 02 330xi, 98 m3 coup
fcpeuro.com has really good prices. Just ordered a overhaul kit from them.
717bimmerboym3 is offline   Reply With Quote
Old 11-25-2012, 07:16 AM   #12
tomoyer
Registered User
 
Join Date: Aug 2011
Location: Reading, Pennsylvania
Posts: 773
My Ride: 03 325xi, 03 330xi
Send a message via Yahoo to tomoyer
Do yourself a favor and order the tank mount as well as the tank. And +1 on the TSTAT, they most often fail in the open position, thus not letting the coolant and engine get to full operating temperature.
tomoyer is offline   Reply With Quote
Old 11-25-2012, 08:56 PM   #13
io14
Registered User
 
Join Date: Nov 2012
Location: Massachusetts
Posts: 37
My Ride: 05 325XI
bimmerzone has very good prices as well for the E46 cooling system overhaul.
io14 is offline   Reply With Quote
Old 11-26-2012, 07:52 PM   #14
Thotfulspot
Registered User
 
Join Date: Apr 2011
Location: Chicago
Posts: 212
My Ride: 2003 330Xi
I just had a thermostat fail in the closed position.
Thotfulspot is offline   Reply With Quote
Old 11-28-2012, 08:16 PM   #15
tomoyer
Registered User
 
Join Date: Aug 2011
Location: Reading, Pennsylvania
Posts: 773
My Ride: 03 325xi, 03 330xi
Send a message via Yahoo to tomoyer
No one stated that the Tstat CAN NOT or DOESN'T fail in the closed position, just not common with BMWs, BUT it does happen.
tomoyer is offline   Reply With Quote
Old 11-28-2012, 08:51 PM   #16
Thotfulspot
Registered User
 
Join Date: Apr 2011
Location: Chicago
Posts: 212
My Ride: 2003 330Xi
Sorry, I didn't mean it that way. I was just saying they can get stuck in either position. When it gets stuck closed, it heats up really fast.
Thotfulspot is offline   Reply With Quote
Old 11-29-2012, 09:21 AM   #17
SamDoe1
Registered User
 
Join Date: Oct 2010
Location: Minnesnowta
Posts: 3,300
My Ride: Clubs baby seals
Even if the tstat fails in the closed position it still won't totally block the flow of coolant, it only will block the flow into the engine block. The rest of the system will still receive coolant flow.
SamDoe1 is offline   Reply With Quote
Old 11-29-2012, 10:33 AM   #18
Thotfulspot
Registered User
 
Join Date: Apr 2011
Location: Chicago
Posts: 212
My Ride: 2003 330Xi
The temp gauge goes from normal to overheated in a matter of minutes. We just dealt with one on a trip from Chicago. It would stick closed intermently. All of a sudden the temp light would go on and the needle would be pegged. Let it cool down and it would work fine for hours. As time went on it would happen more and more often. When I found an independent he changed it and you could see marks on the thermostat where it had been sticking. It rarely got hot when driving because of the air flow at higher speeds. Sitting at idle it would happen almost every time.
Thotfulspot is offline   Reply With Quote
Old 11-29-2012, 10:42 AM   #19
e46alfonso
Registered User
 
Join Date: Aug 2011
Location: ct
Posts: 460
My Ride: 330xi, focus st
Replace everything and never worry again. I'ts an easy diy.
e46alfonso is offline   Reply With Quote
Old 11-29-2012, 11:01 AM   #20
Thotfulspot
Registered User
 
Join Date: Apr 2011
Location: Chicago
Posts: 212
My Ride: 2003 330Xi
It's been replaced. Tank and hoses were replaced before the trip. Just need to replace the water pump.
Thotfulspot is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes Rate This Thread
Rate This Thread:

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
Censor is ON





All times are GMT -5. The time now is 09:56 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
(c) 1999 - 2011 performanceIX Inc - privacy policy - terms of use