Heater Core ? - BMW Forum - BimmerWerkz.com
3-Series (E36) Chat relating to the BMW 3-Series from 1992-1999. Autodoodad Specific models include: BMW 316i, BMW 318i, BMW 318iS/ti, BMW 320, BMW 323, BMW 320, BMW 324, BMW 325, BMW 328.

 
LinkBack Thread Tools Display Modes
#1 (permalink) Old 01-11-2005, 01:07 PM
Neutral Member
 
Join Date: Dec 2004
Location: guilford, ct
Posts: 65
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
walshja is an unknown quantity at this point
(Thread Starter)
ok, I am going to attempt to describe what is happening with my car.

I am losing coolant somewhere, it is not dripping anywhere I can see.

I am smelling coolant in the cabin of the car ONLY when I use the heater, and of course all the windows fog up pretty bad.

BUT, I do not consistently smell coolant in the cabin when I use the heater, only on the REALLY cold days do I have the problem. For instance today, maybe 38 degrees F, and I used the heater and only smelt a tiny bit of coolant, and the windows did not fog up.

Now it seems to me that everything is pointing to a leaky heater core. BUT, why would I only experience the problem on really cold days?

Also, I went about 2 weeks without using the heater, since it becomes impossible to drive with the foggy windows. During this 2 weeks I still was losing coolant.

IF I had a leaky heater core, and I for 2 weeks was not using my heater, why would I be losing coolant?

Is it possible that I don't have a leaky heater core and something else could be wrong?

I hope that it could be something else, because I don't have the time to repair it myself, nor do I have the money to pay someone else !!!!

1994 325iC, 130k miles
walshja is offline  
Sponsored Links
Advertisement
 
#2 (permalink) Old 01-11-2005, 01:41 PM
3rd Gear Member
 
RIBEMR26's Avatar
 
Join Date: Apr 2004
Posts: 577
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
RIBEMR26 is an unknown quantity at this point
It must have to do with how the coolant circulates when the heat is on, because when you flush/change your coolant, you have to have your heat on MAX....

If this is the case, it would make sense that the coolant is leaking in the engine bay when the heat is on, and burning off from the heat of the engine, causing the smell....

Maybe someone with a little more knoweldge can jump in here....

<img src='http://www.bmw-forums.com/forum/uploads/post-46-1094081870.jpg' border='0' alt='user posted image' />

Clear Corners and Sidemarkers
ZKW Euro Ellipsoids w/ DDE Enhanced
Debaffled Airbox w/Green Drop-In High Performance Air Filter
RIBEMR26 is offline  
#3 (permalink) Old 01-11-2005, 01:41 PM
ex owner/admin
 
Furious's Avatar
 
Join Date: Nov 2002
Location: Toronto-Canada
Posts: 10,839
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Furious Furious Furious Furious Furious Furious Furious Furious Furious Furious Furious
Send a message via AIM to Furious
soo hard to say, at first i though yes heatercore (and if you wanna know heatercore replacement is one of the most expensive repairs on our cars) however i cannot be certain therefore please be sure to check with a professional in your area.

Furious is offline  
#4 (permalink) Old 01-11-2005, 03:13 PM
1st Gear Member
 
abemcclellan's Avatar
 
Join Date: Aug 2004
Location: Oklahoma City
Posts: 263
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
abemcclellan is an unknown quantity at this point
i had to replace my heater core in my 300zx. i know its not a bmw but it might have the same concept. well in my case the coolant was leaking inside the dash and causing a little puddle beneath the accelerator pedal. and it would start to leak every time the engine got fairly warm, with the heater on or not. but to take it out and replace, i had to take the entire dash off, steering wheel, and the heater system apart. so it was time consuming. but i don't know how difficult it would be to replace on an e36. but you'll save money if you do it yourself.
abemcclellan is offline  
#5 (permalink) Old 01-11-2005, 03:52 PM
4th Gear Member
 
93 325i's Avatar
 
Join Date: Sep 2004
Location: Connecticut
Posts: 921
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
93 325i is an unknown quantity at this point
Send a message via AIM to 93 325i
Have you ever replaced water pump? Check all the cooling system componets

Complete mod list and pics:

My 1993 325i
93 325i is offline  
#6 (permalink) Old 01-11-2005, 04:42 PM
Neutral Member
 
Join Date: Dec 2004
Location: guilford, ct
Posts: 65
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
walshja is an unknown quantity at this point
(Thread Starter)
Quote:
Originally posted by 93 325i@Jan 11 2005, 04:52 PM
Have you ever replaced water pump? Check all the cooling system componets
[snapback]269078[/snapback]
I did just have my water pump replace, new thermostat and obviously a system flush.

It fixed the cooling issues I had, but did nothing about the coolant smell and window fogging.

It is just weird that I am still loosing coolant even though I was not using the heater at all.

And it is also weird that I can use the heater in warmer weather. I would think if there is a leak in the heater core it would always leak.

arrgghhhh

1994 325iC, 130k miles
walshja is offline  
#7 (permalink) Old 01-11-2005, 05:07 PM
3rd Gear Member
 
RIBEMR26's Avatar
 
Join Date: Apr 2004
Posts: 577
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
RIBEMR26 is an unknown quantity at this point
Again, from what your saying the leak is continuous...but I think it is possible that the leak gets worse when the heat is on...maybe having something to do with the path of the coolant in the system when the heat is turned on....

<img src='http://www.bmw-forums.com/forum/uploads/post-46-1094081870.jpg' border='0' alt='user posted image' />

Clear Corners and Sidemarkers
ZKW Euro Ellipsoids w/ DDE Enhanced
Debaffled Airbox w/Green Drop-In High Performance Air Filter
RIBEMR26 is offline  
#8 (permalink) Old 01-11-2005, 09:55 PM
4th Gear Member
 
spieluhr's Avatar
 
Join Date: Jan 2004
Location: Snohomish, Wa
Posts: 909
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
spieluhr is an unknown quantity at this point
Send a message via AIM to spieluhr
now that you mentioned it Furious, how much is a new Heater Core? cause my car is going in tomorrow for cooling issues and heater repair (either new final stage resistor or heater core)

thanks

<img src='http://img268.echo.cx/img268/1430/zkwsig23iq.jpg' border='0' alt='user posted image' />
1996 328is Black

Suspension: MB Motoring 18x8, Kuhmo Supra 225/35/18ZR
Audio:Eclipse CD3414 HU
Lighting: ZKW W/ DDE PLUS
spieluhr is offline  
#9 (permalink) Old 01-19-2005, 06:39 PM
1st Gear Member
 
Join Date: Jan 2005
Location: Clemson, South Carolina
Posts: 271
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
victorgallas is an unknown quantity at this point
the misteriosly loss of coolant is due to a leaky heater core.
the explanation of foggy and coolant smell clearly indicates this problem.

because the heater core is put in the same box as the ac evaporator, when the coolant leakes it ends up being drained on the ac drain.. this drain goes out on the bottom of the car on top of the transmission.

and is problaly leaking so lottle you did not notice. also cooling can only flow to the heater core when the heater valve is open, so if the coolant was leaking even when not using the heating, the valve is stuck in the open position. that is ahy when doing coolant fluhss, you have to have the heating on, so you can take all the air out of the system, including the air that goes into the heater core.

if its not the heater core, it the o ring that are between the pipes from the engine compartment to the heater core, they fail too.

but in most cases it is the core that goes bad.

the reson why you only have fog on very cold days is because you need a lot of temperature difference form outside to inside in order to create moisture, which is what fog and all about.

it is horrable to do this job, removal of dashboard will be necessary.
but if you have a garage and nothing to do on the weekend is not a bad project..

so in case you decide to do it, i also recommend you to clean all electrical contacts underneath the dashboard, this fixes most of the electrical problems that como and go. because of age and air mouisture some rust builds up on the electrical contacts and the electrical system goes cahoots.

hope this helps.

You are a BMW driver when you become part of the &quot;Ultimate Driving Machine&quot;

Fraude an Fahren
BMW &gt; Bayerische Motorenwerke

Auf Viedersehen der herr

www.clemsonfsae.com
victorgallas is offline  
Sponsored Links
Advertisement
 
Reply

  BMW Forum - BimmerWerkz.com > BMW Model Specific Forums > 3-Series (E36)


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
User Tag List

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Similar Threads
Thread Thread Starter Forum Replies Last Post
Heater Core Problems? emmceethree 3-Series (E21, E30) 0 01-13-2005 01:46 PM
No Coolant To Heater Core, Burrr! Abbey Normal 3-Series (E21, E30) 4 12-13-2004 10:43 PM
Heater Core Replacement eric wiens 3-Series (E36) 9 10-16-2004 09:10 PM
Need To Replace Heater Core wyze 3-Series (E21, E30) 1 09-27-2004 09:33 PM
95 740 heater core gthaler 1,6,7,8 - Series and Mini Cooper 0 06-17-2004 03:35 PM

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

 
For the best viewing experience please update your browser to Google Chrome