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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 > N54 Average Coolant Temp



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      05-11-2012, 11:30 AM   #23
Jeff@TopGearSolutions
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Originally Posted by bimmer_335 View Post
so would replacing coolant make engine run a bit cooler? the reason i ask is my 2007 has been running a little hot lately. Now its one of the first ones that came out so it dont have oil cooler (yeah i know !!!) ... i've never had coolant replaced so am just trying to gather some feedback.
Well what is running hot the oil or the coolant and what temp are you seeing.

If your oil is hot, its probably cause you dont have an oil cooler. If your coolant is hot you could be low on coolant, or have a failing pump or thermostat.

Usually over-heating results in codes and a warning symbol so if you arent seeing those you are technically within the tolerances.

240's is normal oil temp
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      04-23-2015, 03:30 PM   #24
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Hey guys, I finally got a bluetooth scan gauge for my 08 e93 335i with 50k miles. I dont have any issues with high oil temps, overheating lights, or high cooling fan speed. My scan gauge consistently reads coolant temps up to 220 F with non-spirited city driving (it fluctuates rather frequently between 205 F and 220 F). That seems really hot! After seeing this table: http://www.e90post.com/forums/showth...temp+limp+mode It seems like my car is basically in "component protection" for a large percentage of the time. Do you guys think I should check out the t stat and water pump? I know that post #2 said that 220 F was average, but I dont think being in "component protection" would be considered "average."
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      04-23-2015, 04:29 PM   #25
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Originally Posted by NavyDoc View Post
Hey guys, I finally got a bluetooth scan gauge for my 08 e93 335i with 50k miles. I dont have any issues with high oil temps, overheating lights, or high cooling fan speed. My scan gauge consistently reads coolant temps up to 220 F with non-spirited city driving (it fluctuates rather frequently between 205 F and 220 F). That seems really hot! After seeing this table: http://www.e90post.com/forums/showth...temp+limp+mode It seems like my car is basically in "component protection" for a large percentage of the time. Do you guys think I should check out the t stat and water pump? I know that post #2 said that 220 F was average, but I dont think being in "component protection" would be considered "average."
That's normal. DME programmed the engine to run hot at stop and go traffic for emission purpose. The temp will actually start to drop down a bit once on the highway speed.
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      04-23-2015, 06:35 PM   #26
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That's normal. DME programmed the engine to run hot at stop and go traffic for emission purpose. The temp will actually start to drop down a bit once on the highway speed.
Interesting. Thanks for the info.

What temperature would you say is the upper limit of the normal operating range?
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      04-23-2015, 06:58 PM   #27
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Interesting. Thanks for the info.

What temperature would you say is the upper limit of the normal operating range?
you can find all the information and more in here. 108 C for Eco mode, and 104 C for Normal. But it is unclear what exactly triggers these modes.

http://www.e90post.com/forums/showthread.php?t=38856
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      04-23-2015, 10:24 PM   #28
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Originally Posted by Cloud9blue View Post
you can find all the information and more in here. 108 C for Eco mode, and 104 C for Normal. But it is unclear what exactly triggers these modes.

http://www.e90post.com/forums/showthread.php?t=38856
Thanks Cloud9blue. That was an interesting read and very helpful!
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