E90Post
 


ProTUNING Freaks
 
BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Mechanical Maintenance: Break-in / Oil & Fluids / Servicing / Warranty > Overheating - 2006 BMW 325I



Reply
 
Thread Tools Search this Thread
      07-21-2012, 12:57 PM   #1
threedimensions
Registered
United_States
1
Rep
2
Posts

Drives: 2006 BMW 325i
Join Date: Jul 2012
Location: Yakima, Wa

iTrader: (0)

Overheating - 2006 BMW 325I

So obviously I'm on here because I need some help...about a week ago my 06 325i started to overheat no other warning but straight to red overheating alarm. In response I changed the thermostat, flushed the coolant (which was very low) changed the oil and filter (as it was due anyhow). The oil should no signs of water so I ruled out the head gasket. So problem solved....so i thought! Today on a road trip pulling a fairly steep grade with A/C on the engine again alarmed a red overheating alarm. I pulled over as soon as i could popped the hood and seen coolant had came out of the expansion tank.

I am completely at a loss. The car does not overheat when the A/C is off and just the other night my wife pulled the same grade with no problem. Is it the water pump, expansion tank, sensor? By the way, the fan kicks on.

The car has been completely BMW maintained, maintenance plan warranty expired last October and i am the original owner. The car has about 90k miles.

I want to pull my hair out as i am completely at a loss please send me ideas. Thanks in advance.

Last edited by threedimensions; 07-21-2012 at 01:03 PM.
Appreciate 0
      07-21-2012, 01:48 PM   #2
AlanAZ
Captain
AlanAZ's Avatar
12
Rep
800
Posts

Drives: E90 325i sport manual
Join Date: Aug 2009
Location: Scottsdale, AZ

iTrader: (4)

The pump usually causes overheating - the thermostat fails to a full open position, to not cause an overheating condition. I won't say typical, but 90K mls is not unusual for the pump to fail.

Check this and the N52 engine sub-forums, there are a number of well-documented threads. And the DIY forum for changing the pump.
Appreciate 0
      07-21-2012, 03:03 PM   #3
Brad from the OC
Private First Class
United_States
1
Rep
134
Posts

Drives: 325Ia Alpine White
Join Date: May 2006
Location: Southern California

iTrader: (0)

Most likely it's the water pump. Your car's overheating symptoms are the same as others with 2006 E90s. Pump is electric driven and many times the first indication prior to a complete failure is low pump RPMs. That explains why it overheats on high loads in the cooling system. It appears that the 2006 models have a higher incidence of failure. BMW has upgraded the pump design so hopefully your replacement will be more reliable.
Appreciate 0
      07-22-2012, 11:09 PM   #4
threedimensions
Registered
United_States
1
Rep
2
Posts

Drives: 2006 BMW 325i
Join Date: Jul 2012
Location: Yakima, Wa

iTrader: (0)

Thanks for the feedback, my fist assumption was the water pump as I had read other forum postings speaking to the failure of the water pump and/or impeller. I will go with that and let you guys know if that solves the problem.
Appreciate 0
      07-23-2012, 12:01 AM   #5
index1489
Colonel
index1489's Avatar
United_States
37
Rep
2,160
Posts

Drives: Out of warranty BMW
Join Date: Sep 2008
Location: Chino, CA

iTrader: (7)

The water pump fails around 100k, its more due to hours not miles, its electric and not driven by a belt.

Pump should be $450 thermostat $150, maybe 2 hours of labor at a good indy bmw shop.

Order from (East Coast) getbmwparts.com or bmwpartspros.com (West Coast)
__________________
Gotta pay to play.
Appreciate 0
      07-23-2012, 08:25 AM   #6
BKV122
Major
BKV122's Avatar
United_States
15
Rep
1,100
Posts

Drives: E90
Join Date: Feb 2009
Location: NY

iTrader: (1)

Garage List
2006 330xi  [4.75]
Same thing happened to me a week or two ago, coolant seemed to come out of the expansion tank. Assumed it was a the water pump after browsing the forums and changed that and the Tstat at the same. All is good now.
__________________

Monaco Blue 330xi - Terra Interior/6-MT/Sport/Premium/Cold/CSL's/M3 Spoiler Lip/Black Kidney's
Appreciate 0
      07-23-2012, 09:47 AM   #7
Evan@Tischer
BimmerPost Supporting Vendor
Evan@Tischer's Avatar
United_States
351
Rep
5,642
Posts


Drives: Honda Ridgeline
Join Date: Jul 2007
Location: Silver Spring, MD

iTrader: (45)

Send a message via AIM to Evan@Tischer
Waterpump/t-stat kit on special here w/ free ground shipping!
__________________
Evan Winstead
Internet Parts Manager, getBMWparts.com

Email getHelp@getBMWparts.com AIM: Evan at Tischer
Follow us on: FaceBook | Twitter | YouTube
Appreciate 0
      07-23-2012, 10:38 PM   #8
index1489
Colonel
index1489's Avatar
United_States
37
Rep
2,160
Posts

Drives: Out of warranty BMW
Join Date: Sep 2008
Location: Chino, CA

iTrader: (7)

Thats a great deal, good to know when my car blows up soon.
__________________
Gotta pay to play.
Appreciate 0
Reply

Bookmarks

Tags
325i, overheating

Thread Tools Search this Thread
Search this Thread:

Advanced Search

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 Off
Forum Jump


All times are GMT -4. The time now is 12:08 AM.




e90post
e90post
Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2015, Jelsoft Enterprises Ltd.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST