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Old 11-11-2013, 10:05 AM   #1
alaadeen
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Join Date: May 2013
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Engine Temperature for E90

Hi folks,

This may be a noob question:

How can you tell that my E90 engine is overheating or cold? There is no temperature gauge for the engine..?!

Any reason why BMW skipped this feature?
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Old 11-11-2013, 10:22 AM   #2
T.Dot_E30
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Quote:
Originally Posted by alaadeen View Post
How can you tell that my E90 engine is overheating or cold? There is no temperature gauge for the engine..?!
There is a warning light that comes on when the car overheats


Quote:
Originally Posted by alaadeen View Post
Any reason why BMW skipped this feature?
Because oil temp is more useful, with older cars the middle of the gauge has such a huge range that it's almost like an on/off switch to keep the gauge from moving around too much and freaking out novice vehicle owners. Therefore they removed it because there is nothing to worry about until the car is actually overheating.

There is a way to see a digital read out of the coolant temp in the hidden menu, more info here:
http://e90.wikifoundry.com/page/BC+hidden+menus
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Old 11-11-2013, 11:48 AM   #3
alaadeen
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Thanks, T.Dot. The wififoundry link is very interesting. Will give it a shot sometime to play with the hidden display readings.
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Old 11-11-2013, 02:47 PM   #4
jrsmitchell
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I was also surprised that my E9x didn't have a water temp gauge.

I learned the hard way recently that the E9x DME will store "hidden" codes related to things like water temp / water pump function. So if your water pump starts to fail it will know long before you get stranded.

It's a good idea to ask your shop to check for those BMW-specific fault codes every once in a while. Otherwise don't worry about it until the dreaded light comes on.
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