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 Rate Thread Display Modes
Old Today, 04:29 PM   #1
87 300D
Registered User
 
Join Date: May 2017
Location: Norwich, Connecticut.
Posts: 79
My Ride: 2003 BMW 325xi
Water temp gauge e46 question.

Do many, or most E46 temp gauge show the orange needle at 12 noon as normal? Or if it is at 10 o'clock, or 2 o'clock, also a known normal temp reading?

Last edited by 87 300D; Today at 04:30 PM.
87 300D is offline   Reply With Quote
Ads by Google

Guests, get your FREE E46Fanatics.com membership to remove this ad.
Old Today, 04:32 PM   #2
BMW-North
// Quandt AG (Retired) //
 
Join Date: Feb 2008
Location: GTA or Myrtle Beach
Posts: 2,657
My Ride: AMv8,e46x3,e90,e83
Quote:
Originally Posted by 87 300D View Post
Do many, or most E46 temp gauge show the orange needle at 12 noon as normal? Or if it is at 10 o'clock, or 2 o'clock, also a known normal temp reading?
The temp gauge is buffered so that it will sit at 12 o clock when temps are between 75 to 115 Celsius.

Read this thread:

http://forum.e46fanatics.com/showthread.php?t=1013600
BMW-North is offline   Reply With Quote
Old Today, 04:53 PM   #3
jdstrickland
Registered User
 
Join Date: Apr 2010
Location: Murrieta, CA
Posts: 9,255
My Ride: '94 325iC & '00 323i
Quote:
Originally Posted by 87 300D View Post
Do many, or most E46 temp gauge show the orange needle at 12 noon as normal? Or if it is at 10 o'clock, or 2 o'clock, also a known normal temp reading?
Straight up 12. The temp is considered normal from the line before to the line following mid-scale, although it's okay to sweat bullets at the line after mid-scale.
jdstrickland is offline   Reply With Quote
Old Today, 04:55 PM   #4
Mango
e46mango.com
 
Mango's Avatar
 
Join Date: Mar 2006
Location: Southern California
Posts: 26,439
My Ride: Lexus
BMW Top Tech Mango Pro Tip:

Needle should be dead center after car has warmed up. It can go beyond and still be normal but only in the most EXTREME cases--basically would never happen. I used to run up steep grade mountain roads before, full load, high rpm, a/c blasting in 115+ degree heat for over 5 minutes. I'm not talking commuting. I'm talking full on performance ///M driving. Never saw the temp gauge budge past middle. The only time I've EVER heard the fans come on. These cars have a ton of redundancy built into the cooling system as far as capacity is concerned. In fact, when monitoring the temp, the car would throw on its sunglasses and actually force the temps back down. The car would actually run cooler the harder I pushed it! Part of this is by design, but in the context if running hard up hill full time five minutes, it shows how good the system is.
__________________

Last edited by Mango; Today at 04:58 PM.
Mango is offline   Reply With Quote
Old Today, 05:20 PM   #5
BMW-North
// Quandt AG (Retired) //
 
Join Date: Feb 2008
Location: GTA or Myrtle Beach
Posts: 2,657
My Ride: AMv8,e46x3,e90,e83
Quote:
Originally Posted by Mango View Post
BMW Top Tech Mango Pro Tip:

Needle should be dead center after car has warmed up. It can go beyond and still be normal but only in the most EXTREME cases--basically would never happen. I used to run up steep grade mountain roads before, full load, high rpm, a/c blasting in 115+ degree heat for over 5 minutes. I'm not talking commuting. I'm talking full on performance ///M driving. Never saw the temp gauge budge past middle. The only time I've EVER heard the fans come on. These cars have a ton of redundancy built into the cooling system as far as capacity is concerned. In fact, when monitoring the temp, the car would throw on its sunglasses and actually force the temps back down. The car would actually run cooler the harder I pushed it! Part of this is by design, but in the context if running hard up hill full time five minutes, it shows how good the system is.

As I said a few posts up, an unmodified e46 (M52-56) temp gauge will sit at normal (12 o'clock) when the temp is between 75C and 115C The factory default has a 40C buffer. If you have not done the temp gauge buffer adjustment DIY and your needle is not at 12 o'clock after warm up this is NOT normal and means your temp is either below 75C (too cold) or above 115C (which is way too hot).

If your needle moves right and you have not adjusted the temp buffer you are approaching a potential overheat as you are >115C (Which is actually why the needle moved - visual warning)

There are no exceptions despite the statement above by the self proclaimed guru.
BMW-North is offline   Reply With Quote
Old Today, 06:28 PM   #6
87 300D
Registered User
 
Join Date: May 2017
Location: Norwich, Connecticut.
Posts: 79
My Ride: 2003 BMW 325xi
Quote:
Originally Posted by Mango View Post
BMW Top Tech Mango Pro Tip:

Needle should be dead center after car has warmed up. It can go beyond and still be normal but only in the most EXTREME cases--basically would never happen. I used to run up steep grade mountain roads before, full load, high rpm, a/c blasting in 115+ degree heat for over 5 minutes. I'm not talking commuting. I'm talking full on performance ///M driving. Never saw the temp gauge budge past middle. The only time I've EVER heard the fans come on. These cars have a ton of redundancy built into the cooling system as far as capacity is concerned. In fact, when monitoring the temp, the car would throw on its sunglasses and actually force the temps back down. The car would actually run cooler the harder I pushed it! Part of this is by design, but in the context if running hard up hill full time five minutes, it shows how good the system is.
Mango, thank you for your input here. I agree fully with you here.

I am now critical about bmw temp gauge...because I only know MB, Volvo, Audi...and I know they remained accepted and as a constant-true...BMW, I am new!

Last edited by 87 300D; Today at 06:30 PM.
87 300D is offline   Reply With Quote
Old Today, 06:36 PM   #7
87 300D
Registered User
 
Join Date: May 2017
Location: Norwich, Connecticut.
Posts: 79
My Ride: 2003 BMW 325xi
I want to trust BMW...

As said, I've driven German cars for many many years (40 years). Being new BMW here and with a new-used BMW, I'm new to another German car...as I've always imagined....at 62, this is my last automobile.
87 300D 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 10:06 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
(c) 1999 - 2016 performanceIX Inc - privacy policy - terms of use