Engine warm up time - N54Tech.com

remko3dl · 05:18 PM

I drive a 2017 440i and I was curious about the fact that the engine oil warms up quite quickly according to the gauge in the dash.
So I did a log of the engine oil and coolant temperature with the Carly for BMW app on the way home from work.

As you can see on the attached graph the oil and coolant temperature increase at the same rate!? Is that normal for the B58/modern BMW engine?
I find it hard to believe that the oil heats up at the same rate as the coolant, never seen it before...
Also the oil temperature reaches 108 C (226 F) and then remains rock solid at that temperature while the coolant varies between 107 C (225 F) and 112 C (234 F)
This all during a normal commute home with some city traffic and highway. Speeds between 30 and 80 mph and an air temperature of about 8 C (46 F).

Have you noticed similar/the same behavior?

jalkster · 01-29-2018, 07:06 AM

Ive noticed no matter how long and hard I run the car the oil temp gauge on dash will not budge.

remko3dl · 01-29-2018, 12:31 PM

Hmmm.... haven’t tested that yet due to cold temperatures and engine break-in. But after I noticed the graph I already suspected something like that...

Gonna change the oil in two weeks and if the temperature goes up a bit I’ll push a bit harder and see what happens.
I’ll report back.

christian8510 · 01-29-2018, 12:56 PM

From 40 C to 108 C in 8 Minutes is just normal. But the Temperature in the Swamp is a bit less then Engine Temp.

remko3dl · 01-30-2018, 05:12 AM

Quote:

Originally Posted by christian8510

From 40 C to 108 C in 8 Minutes is just normal. But the Temperature in the Swamp is a bit less then Engine Temp.

Ok thanks, but what do you mean by “Swamp”?

christian8510 · 01-30-2018, 09:00 AM

The oil in the Swamp Needs more time to get hot than the oil in the upper engine. I drive like 10Km or over 10 Minutes to get the engine on Temp. befor i have some fun with the car :-) I have a Handy App for free where i can see the Temp. of Water , Oil and Oil Swamp and a loot more . Also the Active Sound design you can shut off thats nice. I am using Samsung Galaxy S5 Android .

BazBar · 01-31-2018, 06:04 AM

Swamp, possibly = SUMP ?

christian8510 · 01-31-2018, 07:52 AM

Yes sump is another word for swamp. Sry for my english i am from Germany :-)
In german it is called Sumpf ^^
It is the Lowest part of the engine.

remko3dl · 01-31-2018, 11:12 AM

OK, that clears things up a bit ;-)

Still find it hard te believe that the oil heats up just as quick as the coolant.
I checked some of my old logs of my 1M but unfortunately it didn't log oil temp...
But I know for sure that the oil in the 1M takes quite a bit longer to reach operating temperature than the coolant.

So I'm still suspicious about the (fake?) oil temperature reading in my 440i ;-)

remko3dl · 01-31-2018, 11:18 AM

Quote:

Originally Posted by christian8510

The oil in the Swamp Needs more time to get hot than the oil in the upper engine. I drive like 10Km or over 10 Minutes to get the engine on Temp. befor i have some fun with the car :-) I have a Handy App for free where i can see the Temp. of Water , Oil and Oil Swamp and a loot more . Also the Active Sound design you can shut off thats nice. I am using Samsung Galaxy S5 Android .

Just to be sure, with the app you are using you can read out two different oil temperatures?
What app are you using?

christian8510 · 01-31-2018, 11:50 AM

You can read a lot off stuff.
Fuel,Boost,Oil Temp,Oil Temp Sump,Air Intake Temp. and a lot more
The Problem is it is a german language app not english.
You Need an Android Handy like Samsung Galaxy S5 and a Bluetooth connecter like the V-gate I Car 2 Bluetooth. There are 3 Slots for Temp. you can Show at the same time on the Display.
The app you can find in Play store it is called OBD.Maven and ist for free.

remko3dl · 01-31-2018, 01:23 PM

OK, Thanks!
German is not a problem, I’m from Holland ��
Now I only need to borrow an Android phone to test it, hahaha

mdma · 02-05-2018, 02:09 AM

In my 240i, I usually see a lag of around 6 degrees until around 70 DegC. From here onwards, coolant and oil temps follow each other closely. Once fully warmed, I also see coolant temp deviate in the range you specified whilst oil temps remain very stable at 109 DegC for my car.

remko3dl · 02-10-2018, 02:50 PM

Spent quite a lot of time the past couple of days trying to get the OBD.Maven app running on several Android emulators on my laptop. However although I got the app working I can’t get it to connect to the OBD WiFi adapter...

So today I went to my brother who has an Android phone and we tried the app and found that the oil in the sump takes a lot longer to heat up than the oil in the top part of the engine. At least that’s where the sensor sits according to the BMW mechanic I spoke today. That sensor is connected to the gauge on the dash.

So this morning (ambient temp 4C/39F) it took about 10 minutes before the gauge on the dash reached operating temp but at that time the oil in the sump was only 29C/84F...
I think it took another 15 minutes before the oil in the sump reached 89C/192F when we arrived at our destination. Quite interesting...

In the screenshot below you can see from top to bottom: sump oil temp, coolant temp and gearbox oil temp

Vorsprung_CJB · 02-10-2018, 03:06 PM

The new Heat Management Module helps with that. I believe it has a heat exchange for oil/coolant which helps warm up (or cool) the oil using the coolant loop.

Tech Doc B58 explains what the HMM does at each warm up phase. The whole doc is a great read for any B58 owner.

http://f30.bimmerpost.com/forums/att...0&d=1441950445

remko3dl · 02-11-2018, 06:46 AM

Read it as well and indeed a very nice document for the B58 owners!

I expect that the oil temperature you see on the dash is the temperature of the oil/coolant heat exchanger.

remko3dl · 02-16-2018, 05:16 PM

Did a "log" with the OBD.Maven app. Unfortunately the app doesn't have a logging functionality so made a screenshot every 10 seconds and then used the values from the screenshots in Excel. Quite time consuming...

Drove the car from home to work in the morning. Ambient temperature was about 2 C / 36 F.

Looking at the graph I find it interesting that both the shape and the values for engine oil temperature are a bit different compared to the log/graph from the Carly app...

Anyway, I thought I'd share it with you

For easy reference I have made both a Celsius and a Fahrenheit graph