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E39 (1997 - 2003)
The BMW 5-Series (E39 chassis) was introduced in the United States as a 1997 model year car and lasted until the 2004 when the E60 chassis was released. The United States saw several variations including the 525i, 528i, 530i and 540i. -- View the E39 Wiki

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  #1  
Old 02-21-2013, 11:11 AM
Euro_Hobbs Euro_Hobbs is offline
Euro Convert
Location: Dayton, OH
 
Join Date: Feb 2012
Posts: 18
Mein Auto: '02 525iT, '93 325is
Temp gauge - 525iT

Hey guys, I just picked up a new (to me) '02 525iT. Have one big question about it, everywhere I have read it says that the temp gauge should be directly at 12 o'clock but mine isn't. It is a smidge to the right of 12, now a buddy of mine has a 540 and it sits right at 12 and never moves. Should I be worried I am running too hot? Most of the cooling system was just replaced and it never moves any further to the right.

Here's a pic for reference. I tried to be as dead on as possible.

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  #2  
Old 02-21-2013, 11:52 AM
esilvas esilvas is offline
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Location: Converse, TX
 
Join Date: Oct 2012
Posts: 72
Mein Auto: 2001 540i
That looks exactly like my 540. I have not had problems. If there is a problem, I hope someone else chimes in.
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'01 540i 6-Speed

Last edited by esilvas; 02-21-2013 at 12:23 PM.
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  #3  
Old 02-21-2013, 12:12 PM
jygesq jygesq is offline
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Location: Bloomfield, CT
 
Join Date: May 2003
Posts: 1,180
Mein Auto: 2000 528 MT
needle is buffered to be straight up . Anything else is not normal. Just watch it carefully to make sure it never goes any higher.
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  #4  
Old 02-21-2013, 12:26 PM
mbell666 mbell666 is offline
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Location: Austin, TX
 
Join Date: Jul 2012
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Mein Auto: e39 2002 540i6
That's about were my 540 sits. If your concerned unlock the cluster and get it to display the actual engine temp in degrees (test 7 I believe)
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An e39 is like a beautiful wife, needs constant attention, lots of money, lets you down at the worse times but you’d never be without it.
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  #5  
Old 02-21-2013, 12:29 PM
esilvas esilvas is offline
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Location: Converse, TX
 
Join Date: Oct 2012
Posts: 72
Mein Auto: 2001 540i
mbell, thanks for the info. I have not unlocked the cluster yet. I have only had the car a few months and am learning every day about it. The last thing I want is get stranded.

Looks like I will be busy this weekend unlocking my cluster.
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Just looking to have some fun while enjoying the ride.

'01 540i 6-Speed
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  #6  
Old 02-25-2013, 03:18 PM
Euro_Hobbs Euro_Hobbs is offline
Euro Convert
Location: Dayton, OH
 
Join Date: Feb 2012
Posts: 18
Mein Auto: '02 525iT, '93 325is
Quote:
Originally Posted by mbell666 View Post
That's about were my 540 sits. If your concerned unlock the cluster and get it to display the actual engine temp in degrees (test 7 I believe)
Do you have a link to unlock the cluster? I have found a few threads but they all seem to be for the low cluster. I have the high.
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  #7  
Old 02-25-2013, 03:32 PM
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johnstern johnstern is offline
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Location: Cape Neddick, Maine
 
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Posts: 828
Mein Auto: 2000 BMW 528iT/5, S/C
Here you go:

http://forums.bimmerforums.com/forum....php?t=1138110
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  #8  
Old 02-25-2013, 05:13 PM
mcsimon mcsimon is offline
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Location: oneonta
 
Join Date: Jan 2013
Posts: 45
Mein Auto: 528i e39
Could b tstat as well, cheap aftermarket, or just not the correct one. Opening at lets say 104c instead of 94c
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  #9  
Old 02-27-2013, 12:50 AM
esilvas esilvas is offline
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Location: Converse, TX
 
Join Date: Oct 2012
Posts: 72
Mein Auto: 2001 540i
After unlocking my cluster, the temp is 106-108F. That was fun to read through my dead pixels.
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Just looking to have some fun while enjoying the ride.

'01 540i 6-Speed
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  #10  
Old 02-27-2013, 07:21 AM
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bluebee bluebee is offline
Seek to understand,^Value
Location: San Jose, California
 
Join Date: Mar 2008
Posts: 20,349
Mein Auto: 02 BMW 525i M54 auto 130K
How the temperature gauge works, in detail, is listed in this thread (found by typing /temperature F3 in the best links):
- What is the temperature of the coolant & when the thermostat opens under normal conditions (1)

Also, how the temperature gauge gets it's readings is found by typing /dts F3 in the bestlinks:
- How to replace the dual temperature sensor DTS, aka double temperature switch (1) (2) (3) (4) & how to make your own short DTS removal tool out of a 22mm or 7/8" box wrench (1)

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Each repair should invariably add to our knowledge base by the process of inexorable incrementalism.
Your job, in return, is to read the suggested threads, where the best people will always add value to those threads, either by pictures or by descriptions, so the next person with the same problem stands on your shoulders.
See also: E39 Bestlinks & How to easily find what you need
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  #11  
Old 02-27-2013, 09:04 AM
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dtadrian dtadrian is offline
BMW's are like women. $$$
Location: miami
 
Join Date: Jul 2012
Posts: 403
Mein Auto: 1999 BMW 528i T Wagon
Quote:
Originally Posted by esilvas View Post
After unlocking my cluster, the temp is 106-108F. That was fun to read through my dead pixels.
On my 528iT I have never been over 98C. Usually hangs out at 96 in city and 94 hwy. but then again you have a 525 which might have a different operating temp. Driving it in city and hwy try to see the fluctuations in temp and report back to us. You may have a small issue
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  #12  
Old 02-27-2013, 01:56 PM
Euro_Hobbs Euro_Hobbs is offline
Euro Convert
Location: Dayton, OH
 
Join Date: Feb 2012
Posts: 18
Mein Auto: '02 525iT, '93 325is
Finally unlocked my cluster and I was reading 90C - 93C (with LOTS of dead pixels)
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  #13  
Old 02-27-2013, 03:57 PM
HTK12 HTK12 is offline
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Location: Finland
 
Join Date: Aug 2012
Posts: 827
Mein Auto: E39 540i
Quote:
Originally Posted by Euro_Hobbs View Post
Finally unlocked my cluster and I was reading 90C - 93C (with LOTS of dead pixels)
That is correct running temperature for 525. Since the needle isn't at 12 o'clock there is an issue with the cluster. Maybe someone has opened the cluster and twisted bumped that needle. There are quite many reasons to open the cluster like fixing dead pixels, blocking warning lights due to some fault in the car etc. Simplest way to fix that would be send the cluster to get those pixels repaired, or repair those pixels yourself. While fixing those pixels it is easy to fix that needle. I fixed the pixels on my e39 and it wasn't as bad as some let you believe, but it's not easy either.
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