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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > When does Limp mode kick in for over heating?



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      02-27-2017, 02:06 PM   #1
natedog7700
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When does Limp mode kick in for over heating?

With the 335's, at which temperature does limp mode kick in for over heating? Is it based off coolant temperature or oil temperature?
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      02-27-2017, 04:41 PM   #2
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Quote:
Originally Posted by natedog7700
With the 335's, at which temperature does limp mode kick in for over heating? Is it based off coolant temperature or oil temperature?
My water pump just went out a week ago. My coolant hit 250 F and went into limp mode.
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      02-27-2017, 05:21 PM   #3
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I believe water temp is two stage. Yellow limp mode at about 235 and red shut down at 250ish.
Oil temp will also cause limp mode independent of water temp. I believe oil temp limp mode trigger is about 275.
I cant verify either by experience, but have read experiences from related blog entries.
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      02-27-2017, 06:07 PM   #4
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If you open a stock bin in tunerpro you can view all these settings and modify them too, including coolant temp setpoints and fan dutycycle.
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      02-27-2017, 11:11 PM   #5
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If you open a stock bin in tunerpro you can view all these settings and modify them too, including coolant temp setpoints and fan dutycycle.
Very cool, can i do it with MHD? I havent used tunerpro before.
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      02-28-2017, 06:19 AM   #6
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Not sure about water temp, but on a trackday at Le Mans last year the oil hit about 140C (285F) and it didn't go in to limp mode. So not sure what temp it would kick in.
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      02-28-2017, 01:13 PM   #7
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I also have hit 280-285 on track/ canyon runs, and not gotten limp mode.
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      02-28-2017, 02:30 PM   #8
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Ive hit about 250 oil temp with no limp mode a couple times. Never higher though.
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      03-03-2017, 12:27 PM   #9
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Daily spoonful of knowledge you bums.
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      03-07-2017, 08:35 AM   #10
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Quote:
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Daily spoonful of knowledge you bums.
V8bait you beautiful human being. Thanks for that info, will come in handy on my next two trackdays in France.
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      03-07-2017, 12:55 PM   #11
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V8bait you beautiful human being. Thanks for that info, will come in handy on my next two trackdays in France.
Yeah he's one of the main ones I really appreciate, he's always bringing the knowledge!!
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      03-12-2017, 02:29 PM   #12
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interesting. what software you using to get the oil temps? will torque work ?

i have:

boost
voltmeter
coolant temp
exhaust gas temp
egr %
maf g/s

all on one screen on torque using a cheapie obdII
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