Please HELP Overheating - BMW Forum - BimmerWerkz.com
BMW Forum BMW Forum

Auto Insurance

» Featured Product
Wheel & Tire Center

Go Back   BMW Forum - BimmerWerkz.com > BMW Model Specific Forums > 3-Series (E46, E90)
Register Home Forum Active Topics Gallery / Showroom Auto Loans Garage Search Today's Posts Mark Forums Read Auto EscrowInsurance

3-Series (E46, E90) Chat relating to the BMW 3-Series from 1999 to Current. Models include: BMW 316i, BMW 318i, BMW 318Ci, BMW 320i, BMW 323i, BMW 325i, BMW 330i, BMW 328 Ci, BMW 328i, BMW 325i/xi, BMW 330Ci, BMW 320d, BMW 330d, BMW 335d.

BimmerWerkz.com is the premier BMW Forum on the internet. Registered Users do not see the above ads.
Reply
 
LinkBack Thread Tools Display Modes
Old 06-12-2011, 01:26 AM   #1 (permalink)
n00b
 
Join Date: Jun 2011
Car:
Posts: 4
Photos:
e46323 is on a distinguished road
Please HELP Overheating

I have a overheating issue with a 2000 323i. All started after driving a 60 mile trip, was at the rest stop and noticed the gauage was in the red, I immediately powered off the car. I let the engine cool and topped of the coolant. I was able to get home with no issues. Over the next couple of day I noticed the car temp would rise if idle. I bled the system and had no problems other than no heat which told me a bac thermostat. I drove the car with no issues with the ts not generating heat. A week or so later the car started to heat up again, check under the hood and noticed the expansion tank was leaking. So I ordered a ts and expansion tank. Replaced both and after blleding the system the car ran fine at idle for 20+ minutes or so. Took the car for a test drive and noticed the temp gauage rising. Bled the system several more times. Still heating up and I noticed the top hose from the ts to the expansion tank has alot of pressure and very hot. Drained the radiator and expansion tank fluids and refilled with a good bleed. Took the car for a drive and the pressure built up and the hose blew off the ts. I am going to replace the hose and the expansion tank cap. I am wondering if the cap is causing the top hose pressure. Just to add, the bottom hose to the radiator is warm and not rock hard like the top hose. Not sure whats going on with this crazy car, any advise would be greately appreciated.

Forgot to add: there is no heat coming from the heater. No water in the oil or oil in the water. No smoking from the exhaust.

Thanks

Last edited by e46323; 06-12-2011 at 01:36 AM. Reason: Added details
e46323 is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 06-12-2011, 01:52 AM   #2 (permalink)
drz
Administrator
 
drz's Avatar
 
Join Date: Dec 2004
Location: Tee Ex
Car: zhp
Posts: 12,129
Photos:
drz has a reputation beyond reputedrz has a reputation beyond reputedrz has a reputation beyond reputedrz has a reputation beyond reputedrz has a reputation beyond reputedrz has a reputation beyond reputedrz has a reputation beyond reputedrz has a reputation beyond reputedrz has a reputation beyond reputedrz has a reputation beyond reputedrz has a reputation beyond repute
Send a message via AIM to drz Send a message via MSN to drz
Is the electrical fan running at all? You can check really quickly in your garage/driveway by simply turning on the car and running the A/C. The electric fan should run whenever the A/C is running. If the fan is not running, then go ahead and check the fuse. If the fuse is fine, you may need a new fan. I forget, but I believe your car should also have the mechanical fan (let me know if it doesn't) that runs off the engine with a viscous clutch. If so, has that fan been replaced recently? Try giving it a little push -- it should spin with some resistance. If it spins freely, you need a new fan clutch.
__________________
drz is offline   Reply With Quote
Old 06-12-2011, 02:04 AM   #3 (permalink)
n00b
 
Join Date: Jun 2011
Car:
Posts: 4
Photos:
e46323 is on a distinguished road
The fan is electric. I did check and after running idle for a few minutes the fan starts. I can take a rolled up piece of paper and stick in the fan and that confirms it was spinning. And my car does not have a fan clutch.
e46323 is offline   Reply With Quote
Old 06-12-2011, 04:06 AM   #4 (permalink)
42, The meaning of life
 
brettski's Avatar
 
Join Date: Jul 2009
Location: Melbourne, Australia
Car: 2000 740iL Individual
Posts: 2,405
Photos:
brettski is just really nicebrettski is just really nicebrettski is just really nicebrettski is just really nicebrettski is just really nice
Welcome to the Werkz.

How long have you had the car for?
Was any work done prior to this issue arising?
Check that the small hose that runs between the radiator and the expansion tank isn't kinked or pinched at all. Park your car with the front elevated (on ramp or similar) and put the heater on flat out, start the car and let it idle in this position to see if you can purge any trapped air from the system. Is the water pump housing heating up fairly quickly?
I have heard of the water pump impeller separating from the shaft once it heats up and expands, and contracting back onto it when it cools down, not sure on you model though.
__________________

Riding in style
brettski is offline   Reply With Quote
Old 06-12-2011, 06:27 AM   #5 (permalink)
Captain... Savvy ?
 
Jack Dabsy's Avatar
 
Join Date: Apr 2011
Location: Barnsley UK
Car: BMW E38 728i 1996 Met Black
Posts: 2,194
Photos:
Jack Dabsy will become famous soon enough
Garage
As Brett says....
Lift the front of the car as high as you dare ! This will help to flush through the heater matrix which may have either an air-lock or even a slight blockage...
Other causes - faulty thermostat !
Is the lower hose noticeably cooler than the top hose?
DAZ
__________________

Eso es todo!
Please press the "REP" button if you are happy with your response/answer...

Please JOIN, or just have a look... Its Totally FREE...
BMW Part Market

BMW Online Manuals (TIS)

New Member ?
Jack Dabsy is offline   Reply With Quote
Old 06-12-2011, 01:10 PM   #6 (permalink)
n00b
 
Join Date: Jun 2011
Car:
Posts: 4
Photos:
e46323 is on a distinguished road
Quote:
Originally Posted by Dabsy View Post
As Brett says....
Lift the front of the car as high as you dare ! This will help to flush through the heater matrix which may have either an air-lock or even a slight blockage...
Other causes - faulty thermostat !
Is the lower hose noticeably cooler than the top hose?
DAZ
Dabsy,

The lower hose coming from the radiator is much cooler than the top hose and doesnt have near the amount of heat and pressure as the top hose.
e46323 is offline   Reply With Quote
Old 06-12-2011, 01:13 PM   #7 (permalink)
n00b
 
Join Date: Jun 2011
Car:
Posts: 4
Photos:
e46323 is on a distinguished road
Quote:
Originally Posted by brettski View Post
Welcome to the Werkz.

How long have you had the car for?
Was any work done prior to this issue arising?
Check that the small hose that runs between the radiator and the expansion tank isn't kinked or pinched at all. Park your car with the front elevated (on ramp or similar) and put the heater on flat out, start the car and let it idle in this position to see if you can purge any trapped air from the system. Is the water pump housing heating up fairly quickly?
I have heard of the water pump impeller separating from the shaft once it heats up and expands, and contracting back onto it when it cools down, not sure on you model though.
Brett,

I have owned the car for about 6 months. The previous owner had replaced the radiator, and t-stat along with various other parts that were due to be replaced. The previous owner was a mechanic and the car ran great for the past 6 months.

I have the car on some ramps when trying to bleed. I hope its just air, that top hose is hard as a rock and makes me wonder if my new t-stat is letting coolant flow.
e46323 is offline   Reply With Quote
Old 06-12-2011, 06:18 PM   #8 (permalink)
42, The meaning of life
 
brettski's Avatar
 
Join Date: Jul 2009
Location: Melbourne, Australia
Car: 2000 740iL Individual
Posts: 2,405
Photos:
brettski is just really nicebrettski is just really nicebrettski is just really nicebrettski is just really nicebrettski is just really nice
Can you feel the waterpump & thermostat housings to see if they heat up reasonably quickly?
If you have a large airlock which effectively isolates the thermostat from the coolant it may cause this issue, some people go the the extent of drilling a small hole in the thermostat body (not mechanism) so that trapped air can be purged through by the water pump.
__________________

Riding in style
brettski is offline   Reply With Quote
Sponsored Links
Advertisement
 
Reply

  BMW Forum - BimmerWerkz.com > BMW Model Specific Forums > 3-Series (E46, E90)


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
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 Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
E36 318i overheating and not overheating !!?? lucky178tb 3-Series (E36) 7 07-20-2009 07:16 PM
overheating help help jasoncole 3-Series (E36) 4 02-17-2009 05:52 PM
STILL OVERHEATING - Please Help dnino10 3-Series (E36) 13 12-18-2008 12:17 PM
overheating a bit cjbbaines1 3-Series (E21, E30) 0 04-15-2008 09:20 PM
Overheating. Brian325i 3-Series (E36) 3 11-02-2004 02:44 PM

Powered by vBadvanced CMPS v3.2.2

All times are GMT -5. The time now is 10:50 AM.



Powered by vBulletin® Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Content Relevant URLs by vBSEO 3.3.2
Garage Plus vBulletin Plugins by Drive Thru Online, Inc.