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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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Old 06-23-2014, 06:13 PM
hh3uunp's Avatar
hh3uunp hh3uunp is offline
Ball Don't lie
Location: MA
Join Date: Nov 2012
Posts: 946
Mein Auto: 2001 Dinan m5
How to tell if you have a stuck thermostat

Maybe this is me being obsessed with my car but I swear it takes too long to warm up.

I really don't push it over 3k until it's completely warm could my driving style be the problem

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Old 06-23-2014, 06:20 PM
bluebee's Avatar
bluebee bluebee is offline
Seek to understand,^Value
Location: San Jose, California
Join Date: Mar 2008
Posts: 20,087
Mein Auto: 02 BMW 525i M54 auto 130K
Originally Posted by hh3uunp View Post
Maybe this is me being obsessed with my car but I swear it takes too long to warm up
This thread has lots of good information and tons of diagrams and explanations ...
- What is the temperature of the coolant & when the thermostat opens under normal conditions (1)
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

Last edited by bluebee; 06-23-2014 at 06:21 PM.
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Old 06-23-2014, 07:02 PM
Burning2nd Burning2nd is offline
Under the lift arms
Location: Under the lift arms
Join Date: Aug 2010
Posts: 4,096
Mein Auto: E39 540, E36 328is, E83x3
let the engine run for about 60 seconds..... then off you go..

or from a dead cold... let it idle.. you should see normal temp in 15-20 min no longer..

if the stat is stuck "OPEN" (cause thats what your asking) you wouldnt get heat the guage would stay closer to the blue (left)
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