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 > General E46 Forum

General E46 Forum
This is the place to get answers, opinions and everything you need related to your E46 (sedan, coupe, convertible and wagon) BMW!

Reply
 
Thread Tools Search this Thread Rating: Thread Rating: 1 votes, 5.00 average. Display Modes
Old 11-15-2008, 09:59 AM   #21
IxNay
Registered User
 
Join Date: Jan 2005
Location: New England //M Posts: 56,959
Posts: 1,242
My Ride: 2000 328Ci 5sp SP
Have you tried putting the heat up to the max (91 degrees) ? If heat comes out at the max only, then you likely have a problem with the heater control unit in the dash. It is the part with the digital display and buttons for the heat/ac on the dash.
__________________
IxNay is offline   Reply With Quote
Old 11-15-2008, 10:00 AM   #22
christraylor2
Registered User
 
Join Date: Sep 2008
Location: Georgia
Posts: 125
My Ride: 2002 325CI
Quote:
Originally Posted by IxNay View Post
Have you tried putting the heat up to the max (91 degrees) ? If heat comes out at the max only, then you likely have a problem with the heater control unit in the dash. It is the part with the digital display and buttons for the heat/ac on the dash.
The heat comes out at all fan speeds when the heat decides to come out, like the other night when it was working shortly at any fan speed I could get heat.
christraylor2 is offline   Reply With Quote
Old 11-15-2008, 10:24 AM   #23
330ciandr6
Registered User
 
Join Date: May 2007
Location: .
Posts: 6,605
My Ride: .
Send a message via AIM to 330ciandr6 Send a message via Yahoo to 330ciandr6
connection at heater valves which decide if you get heat or not? i'd warm up the car, turn on the heat and touch a heater hose after the heater valves and see if coolant is flowing through it
__________________
Have a oil or coolant leak? Click here!:http://forum.e46fanatics.com/showthr...732&highlight=
ABS/DSC/Brake/Airbag light on?? Click here!:http://forum.e46fanatics.com/showthr...648&highlight=
330ciandr6 is offline   Reply With Quote
Old 11-15-2008, 10:25 AM   #24
330ciandr6
Registered User
 
Join Date: May 2007
Location: .
Posts: 6,605
My Ride: .
Send a message via AIM to 330ciandr6 Send a message via Yahoo to 330ciandr6
oh and if its not bled completely heater will not work right.
__________________
Have a oil or coolant leak? Click here!:http://forum.e46fanatics.com/showthr...732&highlight=
ABS/DSC/Brake/Airbag light on?? Click here!:http://forum.e46fanatics.com/showthr...648&highlight=
330ciandr6 is offline   Reply With Quote
Old 11-15-2008, 10:25 AM   #25
TitaniumCranium
/// Limitless
 
TitaniumCranium's Avatar
 
Join Date: Apr 2005
Location: Seattle / Sequim
Posts: 3,185
My Ride: 2002 BMW 330Ci
Quote:
Originally Posted by christraylor2 View Post
Do you think that either of those would cause the erratic temperature behavior and the loss of cabin heating? There is no heat even when the car's temperature is at the '12' position.
Yes, I think it could cause the erratic temps you describe.

The wire coming from the thermostat acts as an electrically controlled valve. I believe it's a preheater for the stat. If your electrical connections are intermittent you woud experience unanticipated behavior.

It controls the direction of coolant flow through the block. It's plausible that one of those paths could bypass the heater core.

This has happened to me, including throwing the codes, but It was inspection time so I replaced everything - tstat, sensor, pump, expansion tank and hoses.

One other thing I remember. When I got my stat it looked odd. It wasn't pushed all the way into the housing. The metal legs that center the valve in the housing were not snapped into the housing... just a thought.
__________________

/// MODS
/// Auto => 6-Spd Manual Conversion | Apex EC-7 | Koni/Ground Control Coilovers | Vorshlag Camber Plates | Meyle HD LCA | PowerFlex bushings | GruppeM rep CAI | Shark Injector | 6000k HID's and Fogs | BMW European MTechII | BMW Performance Shifter | ACS Mirrors and Rear Spoiler ///

Last edited by TitaniumCranium; 11-15-2008 at 10:30 AM.
TitaniumCranium is offline   Reply With Quote
Old 11-15-2008, 10:28 AM   #26
TitaniumCranium
/// Limitless
 
TitaniumCranium's Avatar
 
Join Date: Apr 2005
Location: Seattle / Sequim
Posts: 3,185
My Ride: 2002 BMW 330Ci
Quote:
Originally Posted by 330ciandr6 View Post
oh and if its not bled completely heater will not work right.
True.

He mentioned that the mechanic just wiggled some stuff and it then worked so electrical connection sounds like it would be more likely.

Still I would not discount the air bleed. It could be a combination of things too.

I just have to ask... You have checked the coolant level - right?
__________________

/// MODS
/// Auto => 6-Spd Manual Conversion | Apex EC-7 | Koni/Ground Control Coilovers | Vorshlag Camber Plates | Meyle HD LCA | PowerFlex bushings | GruppeM rep CAI | Shark Injector | 6000k HID's and Fogs | BMW European MTechII | BMW Performance Shifter | ACS Mirrors and Rear Spoiler ///
TitaniumCranium is offline   Reply With Quote
Old 11-15-2008, 11:29 AM   #27
christraylor2
Registered User
 
Join Date: Sep 2008
Location: Georgia
Posts: 125
My Ride: 2002 325CI
Quote:
Originally Posted by TitaniumCranium View Post
True.

He mentioned that the mechanic just wiggled some stuff and it then worked so electrical connection sounds like it would be more likely.

Still I would not discount the air bleed. It could be a combination of things too.

I just have to ask... You have checked the coolant level - right?
Yes, I have bled, re-bled, re-bled that re-bleeding and re-bled once more for good measure. I doubt air to be the culprit of this. I am very confused still at this point. Darn euro engineering!
christraylor2 is offline   Reply With Quote
Old 11-15-2008, 12:24 PM   #28
330ciandr6
Registered User
 
Join Date: May 2007
Location: .
Posts: 6,605
My Ride: .
Send a message via AIM to 330ciandr6 Send a message via Yahoo to 330ciandr6
umm....why didn't ya asking what he "wiggled"...
__________________
Have a oil or coolant leak? Click here!:http://forum.e46fanatics.com/showthr...732&highlight=
ABS/DSC/Brake/Airbag light on?? Click here!:http://forum.e46fanatics.com/showthr...648&highlight=
330ciandr6 is offline   Reply With Quote
Old 11-15-2008, 04:26 PM   #29
christraylor2
Registered User
 
Join Date: Sep 2008
Location: Georgia
Posts: 125
My Ride: 2002 325CI
Quote:
Originally Posted by 330ciandr6 View Post
umm....why didn't ya asking what he "wiggled"...

he 'wiggled' around the water pump, I watched him do it, and then almost immediately my heat was working but took a few seconds to reach a 'hot' temperature.
christraylor2 is offline   Reply With Quote
Old 11-15-2008, 04:39 PM   #30
330ciandr6
Registered User
 
Join Date: May 2007
Location: .
Posts: 6,605
My Ride: .
Send a message via AIM to 330ciandr6 Send a message via Yahoo to 330ciandr6
wtf...wiggled the water pump? if your water pump can be "wiggled" you need a new one!
__________________
Have a oil or coolant leak? Click here!:http://forum.e46fanatics.com/showthr...732&highlight=
ABS/DSC/Brake/Airbag light on?? Click here!:http://forum.e46fanatics.com/showthr...648&highlight=
330ciandr6 is offline   Reply With Quote
Old 11-15-2008, 10:56 PM   #31
christraylor2
Registered User
 
Join Date: Sep 2008
Location: Georgia
Posts: 125
My Ride: 2002 325CI
Quote:
Originally Posted by 330ciandr6 View Post
wtf...wiggled the water pump? if your water pump can be "wiggled" you need a new one!
around it, not the actual pump.
christraylor2 is offline   Reply With Quote
Old 11-16-2008, 01:31 AM   #32
330ciandr6
Registered User
 
Join Date: May 2007
Location: .
Posts: 6,605
My Ride: .
Send a message via AIM to 330ciandr6 Send a message via Yahoo to 330ciandr6
ok...i'm just trying to understand what he moved around...
__________________
Have a oil or coolant leak? Click here!:http://forum.e46fanatics.com/showthr...732&highlight=
ABS/DSC/Brake/Airbag light on?? Click here!:http://forum.e46fanatics.com/showthr...648&highlight=
330ciandr6 is offline   Reply With Quote
Old 11-16-2008, 07:10 AM   #33
NoVaDreier
Registered User
 
Join Date: Nov 2002
Location: Alexandria, Va.
Posts: 521
My Ride: 2001 325i
Did you re-secure the plug cable to the radiator hose with a cable tie? Make sure that the plug is fully inserted in the thermostat housing and that the female contacts in the plug of the electrical connection are clean. You could even apply a contact enhancer like Caig ProGold or Stabilant 22 if you have it.

If that fails, do a continuity test on the wires in the plug. One may have fatiqued from being disconnected.
NoVaDreier is offline   Reply With Quote
Old 11-16-2008, 07:14 AM   #34
christraylor2
Registered User
 
Join Date: Sep 2008
Location: Georgia
Posts: 125
My Ride: 2002 325CI
I'll make sure that it's fully inserted this morning, although I doubt that is to blame...
christraylor2 is offline   Reply With Quote
Old 11-16-2008, 03:24 PM   #35
strongbad
Registered User
 
Join Date: Oct 2008
Location: DC Metro Area
Posts: 71
My Ride: 2002 325CI
Final stage resistor

Have you changed it? Its a PITA, 90 mins if you have big hands.. Get one for $55 and change it.
strongbad is offline   Reply With Quote
Old 11-16-2008, 04:26 PM   #36
330ciandr6
Registered User
 
Join Date: May 2007
Location: .
Posts: 6,605
My Ride: .
Send a message via AIM to 330ciandr6 Send a message via Yahoo to 330ciandr6
^ takes me like 20-30 min in and out. its not that hard...
__________________
Have a oil or coolant leak? Click here!:http://forum.e46fanatics.com/showthr...732&highlight=
ABS/DSC/Brake/Airbag light on?? Click here!:http://forum.e46fanatics.com/showthr...648&highlight=
330ciandr6 is offline   Reply With Quote
Old 11-16-2008, 04:38 PM   #37
strongbad
Registered User
 
Join Date: Oct 2008
Location: DC Metro Area
Posts: 71
My Ride: 2002 325CI
20-30 after you have done it once already.

I found it difficult to get my big arse head and hands around in there whilst laying on my back with my head in the passengers floor board.

Also.. to the OP.. if it was your thermostat.. and your car never got to operating temp.. especially hot enough to provide 75F temps.. you would be running rich as heck all the time. Leave the engine components alone and change the FSU/FSR (called two different things, same unit.)
strongbad is offline   Reply With Quote
Old 11-16-2008, 06:42 PM   #38
DarkJoker
Registered User
 
Join Date: Aug 2007
Location: mass
Posts: 912
My Ride: 01 330ci
ive never seen a final stage cause erractic temps

erractic blower speeds yes but never temps and ive changed a buttload of em
DarkJoker is offline   Reply With Quote
Old 11-16-2008, 08:33 PM   #39
strongbad
Registered User
 
Join Date: Oct 2008
Location: DC Metro Area
Posts: 71
My Ride: 2002 325CI
my car was blowing cold air before I changed mine. Just figured they guy can't loose by changing a $50 part.. he's tried almost everything else.
strongbad is offline   Reply With Quote
Old 11-16-2008, 08:40 PM   #40
Optio
Registered User
 
Join Date: May 2008
Location: Northwest
Posts: 386
My Ride: 328i
Your connector to the T-stat is bad......remove the connector and inspect the contact. BMW parts department sales connector repair kits.
Optio is offline   Reply With Quote
Reply

Tags
coolant, heat, thermostat

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 12:50 PM.


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