Home Forums Articles How To's FAQ Register
Go Back   Xoutpost.com > BMW SAV Forums > X5 (E53) Forum
Arnott
User Name
Password
Member List Premier Membership Search Today's Posts Mark Forums Read

Xoutpost server transfer and maintenance is occurring....
Xoutpost is currently undergoing a planned server migration.... stay tuned for new developments.... sincerely, the management


Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 12-15-2018, 01:57 PM
Member
 
Join Date: Dec 2018
Location: wisconsin
Posts: 3
cz550 is on a distinguished road
e53 temperature issues - KTMP is much higher than OBD reading

Hello all. I have a 2005 3.0i X5.

Yesterday I hooked up my OBD gauge tool and when the engine is hot it reads around 77 C (170 F). Then I looked at the KTMP (using the dash "secret" menu) and it says 132 C (270 F). The needle gauge on the dash is right in the middle of the range.

Is it possible that my temperature switch is faulty and the computer thinks the engine is overheating, so it is opening the thermostat and not allowing my engine to actually come up to temperature? I'm also noticing white slimy stuff on dip stick and oil fil cap, so I don't think the engine is getting up to temperature. It's not throwing a check engine light.

KTMP 132 C (270 F)
OBD 77 C (170 F)
Ambient -7 C (20 F)
__________________
----------------------
e53 2005 X5 3.0i
Reply With Quote

Sponsored Links

  #2  
Old 12-15-2018, 05:41 PM
Member
 
Join Date: Dec 2018
Location: wisconsin
Posts: 3
cz550 is on a distinguished road
Okay well I just learned a valuable lesson... the KTMP temperature is not correct when the car is off. I didn't know you could look at KTMP temperature while driving (hold right button for 5 seconds), I was using the KTMP menu when the engine was off (hold right button for 2 seconds, then go to key position 1).

So now the KTMP temperature is matching the ODB temperature while driving. It's just not getting up to operating temperature. Could this be due to a thermostat that is stuck open?
__________________
----------------------
e53 2005 X5 3.0i
Reply With Quote
  #3  
Old 12-15-2018, 06:23 PM
Overboost's Avatar
//Binary is in my DNA
 
Join Date: Apr 2006
Location: Huntersville, NC
Posts: 1,623
Overboost is on a distinguished road
Quote:
Originally Posted by cz550 View Post
Okay well I just learned a valuable lesson... the KTMP temperature is not correct when the car is off. I didn't know you could look at KTMP temperature while driving (hold right button for 5 seconds), I was using the KTMP menu when the engine was off (hold right button for 2 seconds, then go to key position 1).

So now the KTMP temperature is matching the ODB temperature while driving. It's just not getting up to operating temperature. Could this be due to a thermostat that is stuck open?
In the winter months you can find that you have a soft fail thermostat. You never notice it in the summer months but once the ambient temperatures drop it becomes evident and could possible have been failing for months.

That being said, if you have been operating the engine at highway speeds for 15 minutes or more, your gauge should be at the 12 o'clock position. Keep in mind, short easy throttle runs to the market will take longer to warm up in the winter months. If it never gets there after 30 minutes on the road, you probably have a soft fail thermostat. It happened to mine last year.

https://xoutpost.com/bmw-sav-forums/...hermostat.html
__________________
  • 2004 E53 X5 3.0 ZSP (4/04 build date) Jet Black exterior/Sand Beige interior
  • 2002 E46 325i ZPP (2/02 build date) Alpine White exterior/Hell Beige interior

Digital Competition Systems
The older I get... The faster I was...
No Fear


Reply With Quote
  #4  
Old 01-09-2019, 01:22 PM
Member
 
Join Date: Dec 2018
Location: wisconsin
Posts: 3
cz550 is on a distinguished road
Solved! Thanks Overboost! I swapped out the thermostat and now it gets up to 94 C (202 F). Swapping out the thermostat was a surprisingly easy job. Here's the video I followed:

How to Replace the Water Pump and Thermostat on a BMW X5 with 3.0 L Engine
https://youtu.be/HdsxsDNeSic
__________________
----------------------
e53 2005 X5 3.0i

Last edited by cz550; 01-09-2019 at 10:13 PM. Reason: Temperature correction
Reply With Quote
  #5  
Old 01-09-2019, 01:34 PM
Overboost's Avatar
//Binary is in my DNA
 
Join Date: Apr 2006
Location: Huntersville, NC
Posts: 1,623
Overboost is on a distinguished road
Quote:
Originally Posted by cz550 View Post
Solved! Thanks Overboost! I swapped out the thermostat and now it gets up to 94 C (102 F). Swapping out the thermostat was a surprisingly easy job.
__________________
  • 2004 E53 X5 3.0 ZSP (4/04 build date) Jet Black exterior/Sand Beige interior
  • 2002 E46 325i ZPP (2/02 build date) Alpine White exterior/Hell Beige interior

Digital Competition Systems
The older I get... The faster I was...
No Fear


Reply With Quote
Reply

Bookmarks

Tags
e53 coolant temperature

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





All times are GMT -4. The time now is 04:56 AM.
vBulletin, Copyright 2019, Jelsoft Enterprises Ltd. SEO by vBSEO 3.6.0
2017 Xoutpost.com. All rights reserved. Xoutpost.com is a private enthusiast site not associated with BMW AG.
The BMW name, marks, M stripe logo, and Roundel logo as well as X3, X5 and X6 designations used in the pages of this Web Site are the property of BMW AG.
This web site is not sponsored or affiliated in any way with BMW AG or any of its subsidiaries.