Welcome to Bimmerfest -- The #1 Online Community for BMW related information! Please enjoy the discussion forums below and share your experiences with the 200,000 current, new and past BMW owners. The forums are broken out by car model and into other special interest sections such as BMW European Delivery and a special forum to voice your questions to the many BMW dealers on the site to assist our members!

Please follow the links below to help get you started!

Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 7 Series / 8 Series > 7 Series - E38 (1995 - 2001)

7 Series - E38 (1995 - 2001)

Reply
 
Thread Tools Display Modes
  #1  
Old 10-25-2013, 10:25 AM
BMScott BMScott is offline
Registered User
Location: Idaho
 
Join Date: Oct 2013
Posts: 1
Mein Auto: 740i
Running Warm

Hey all! I bought a 1997 740i a few weeks ago and absolutely love the thing. The other day I decided to hook my OBD reader to the car. Everything looked fine except the coolant temperature. The gauge on the dash says everything is fine and is right down the center. The OBD says it is running between 230 to 235 F. That seems very warm in my opinion. I have an XJ8 with an engine that is similar in design to the M62 that only heats up to 198 F on the hottest of days.

I have tried bleeding the system, which did help the heater out quite a bit, but it still stays right at 230 F. It does not matter if I'm idling, on the freeway, or putting it under load. Outside temperature does not seem to affect it either (mornings are 40F afternoons are 70ish). The fan clutch is kicking on and off as it should. The top and bottom radiator hoses are both hot, with the top one being the hottest. Everything seems normal... except the indicated temperature. Could it be the sensor? I haven't gotten that far yet... But any advice is appreciated, and thanks in advance!

Last edited by BMScott; 10-25-2013 at 10:26 AM.
Reply With Quote
Advertisement
  #2  
Old 10-25-2013, 06:11 PM
Mayorchuck Mayorchuck is offline
Officially Welcomed to the 'Fest
Location: Farley, MO
 
Join Date: May 2013
Posts: 787
Mein Auto: '96 740iL
Welcome to the forum. Nothing wrong with that temp. You should have a 110C thermostat which is 230F. Mine runs between 108-110C.
Reply With Quote
  #3  
Old 10-25-2013, 06:17 PM
Mayorchuck Mayorchuck is offline
Officially Welcomed to the 'Fest
Location: Farley, MO
 
Join Date: May 2013
Posts: 787
Mein Auto: '96 740iL
A few sites if you don't have them. Look down the left column in the first link and learn how to unlock your OBC (cluster). One of the things you can do is watch your temp real time on the cluster.

http://www.meeknet.co.uk/E38/Index.htm
http://www.e38.org/
Reply With Quote
  #4  
Old 10-25-2013, 06:33 PM
ebida3's Avatar
ebida3 ebida3 is offline
Society of the 7's East
Location: High Point, NC
 
Join Date: May 2010
Posts: 555
Mein Auto: 2001 740iL
The engineers build the car to optimize performance within an acceptable temp range. Once this temp is established the sensor and gauge are designed to reflect this. Not the other way around. So each motor has different operating temps.
Reply With Quote
Reply

Bookmarks


Forum Navigation
Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 7 Series / 8 Series > 7 Series - E38 (1995 - 2001)
Today's Posts Search
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



Forum Jump


All times are GMT -7. The time now is 10:55 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
© 2001-2011 performanceIX, Inc. All Rights Reserved .: guidelines .:. privacy .:. terms