What is the normal coolant & engine oil temp of your 135i

[STR8-6IX]

modern BMW's with the electric water pump run hot for emission and fuel economy purposes.

120c are tracks temps and too high of a temp to be seeing on the street.

for those of you with oil temperatures reaching past 110c a good quality 5w40 like motul, shell rotella t6, and liqui moly is recommended as well as removing your plastic engine cover in warmer weather to maintain temps.

[tyhackman15]

Originally Posted by Texoma1836

Sorry to bring this back up guys, but it's 64° F here in Texas and my Kiwi3 is reading my coolant temp at 236°. I've already had a electric water pump failure that caused my coolant to literally boil away and made me go into limp mode in the middle of nowhere. That was replaced about 3 months ago, am I already having problems again?

My N55 runs at 220-230F coolant here in Austin. Haven't seen over 230 but I haven't owned it through a summer yet. Our M235i at work runs in the same range, 220-230+. You have to remember that with an electric water pump, the idea of running cooler when you are driving "nicely" goes out the window. The car will run where it wants to, based on driving conditions, in order to maximize efficiency and manage emissions. We see 235F coolant whether we are idling the car for 3 hours in 100F temps or tracking it. You only have to worry when things get above that, and the car will let you know you have an issue.

[Texoma1836]

Originally Posted by tyhackman15

My N55 runs at 220-230F coolant here in Austin. Haven't seen over 230 but I haven't owned it through a summer yet. Our M235i at work runs in the same range, 220-230+. You have to remember that with an electric water pump, the idea of running cooler when you are driving "nicely" goes out the window. The car will run where it wants to, based on driving conditions, in order to maximize efficiency and manage emissions. We see 235F coolant whether we are idling the car for 3 hours in 100F temps or tracking it. You only have to worry when things get above that, and the car will let you know you have an issue.

I was going down 2222 out to the Oasis when I decided to check the temps and they were reading that high. I've gone into limp mode once before from that water pump failure I mentioned. The car let me drive normally all the way to the dealership and my advisor told me I was lucky I didn't melt the whole block and that a sensor should have prevented me from being able to drive at those temps. Thus the whole reason I got an OBD reader and why I'm now quite nervous

[sl8anic]

Funny enough my 2013 just had coolant pump failure last week, been keeping an eye on oil temps. They seemed high compared to before but I think I'm being paranoid now. Seems like it's in 230-240 range.

[blue135]

Interesting, sl8anic, Mine runs at 240 when it is warmed up. Almost never goes to 250, and on extended runs, never goes to 230.

[bNks334]

Not sure why people are still so confused on this topic... People also seem to be quoting the oil temp gauge as their coolant temps LOL. The in-dash gauge is for oil. Coolant can only be read through idrive, if you have it. The oil thermostat operates in the range of 220-250f. Anything more than 250f on the oil means you might benefit from a bigger oil cooler or some other cooling upgrade. I'd say ideal would be to keep it at 250f but no more than 280f...

Here it is straight from BMW academy (N55):

Engine cooling
The engine cooling system utilizes an electric coolant pump. The heat management
determines the current cooling requirement and controls the cooling system accordingly.
Under certain circumstances, the coolant pump can be completely switched off, e.g. to
rapidly heat up the coolant during the warm-up phase. The coolant pump continues to
operate when the hot engine is shut down. The coolant capacity can therefore be varied
regardless of the engine speed. In addition to the characteristic map thermostat, the heat
management makes it possible to use various characteristic maps for controlling the
coolant pump. In this way the engine control unit can adapt the engine temperature to
the driving conditions.
The engine control unit regulates the following temperature ranges:
• 108°C/226°F = Economy mode
• 104°C/219°F = Normal mode
• 95°C/203°F = High mode
• 90°C/194°F = High mode and control with characteristic map thermostat
The engine management sets a higher temperature (108°C) when, based on vehicle
operation, the engine control unit detects ”Economy” mode. The engine is operated with
relatively low fuel requirements in this temperature range. The internal engine friction is
reduced at higher temperatures. The increase in temperature therefore results in low fuel
consumption in the low load range. The driver wishes to utilize the optimum power developed
by the engine in “High and control with characteristic map thermostat” mode. For
this purpose, the temperature in the cylinder head is reduced to 90°C. This temperature
reduction promotes improved volumetric efficiency, thus resulting in an increased engine
torque. Adapted to the relevant driving situation, the engine control unit can now regulate
a defined operating range. In this way it is possible to influence the fuel consumption and
power output through the cooling system.
92
N55 Engine
System Protection
If the coolant or the engine oil overheat during operation, certain vehicle functions are
influenced to the effect that more energy is available to the engine cooling system.
These measures are divided over two operating modes:
• Component protection
- Coolant temperature between 117°C/242°F and 124°C/255°F
- Engine oil temperature between 150°C/300°F and 157°C/314°F
- Result: The output of the air conditioning system
(up to 100%) and of the engine is reduced
• Emergency
- Coolant temperature between 125°C/257°F and 129°C/264°F
- Engine oil temperature between 158°C/316°F and 163°C/325°F
- Result: The power output of the engine is reduced
(up to 90%)

Texoma1836
blue135
tyhackman15
sl8anic

[tyhackman15]

Originally Posted by bNks334

Not sure why people are still so confused on this topic... People also seem to be quoting the oil temp gauge as their coolant temps LOL. The in-dash gauge is for oil. Coolant can only be read through idrive, if you have it. The oil thermostat operates in the range of 220-250f. Anything more than 250f on the oil means you might benefit from a bigger oil cooler or some other cooling upgrade. I'd say ideal would be to keep it at 250f but no more than 280f...

If the coolant or the engine oil overheat during operation, certain vehicle functions are
influenced to the effect that more energy is available to the engine cooling system.
These measures are divided over two operating modes:
• Component protection
- Coolant temperature between 117°C/242°F and 124°C/255°F
- Engine oil temperature between 150°C/300°F and 157°C/314°F
- Result: The output of the air conditioning system
(up to 100%) and of the engine is reduced
• Emergency
- Coolant temperature between 125°C/257°F and 129°C/264°F
- Engine oil temperature between 158°C/316°F and 163°C/325°F
- Result: The power output of the engine is reduced
(up to 90%)

I've read from other sources the economy mode is 231F, and that is reflected in my 2012's temperatures. It reaches 231.8F before going back down a few degrees (obviously not talking oil temps, I monitor coolant via an OBD2 adapter).

Maybe the numbers have been adjusted with software revisions? Not sure, but either way the point that it targets different values is all that really matters.

[bNks334]

Originally Posted by tyhackman15

I've read from other sources the economy mode is 231F, and that is reflected in my 2012's temperatures. It reaches 231.8F before going back down a few degrees (obviously not talking oil temps, I monitor coolant via an OBD2 adapter).

Maybe the numbers have been adjusted with software revisions? Not sure, but either way the point that it targets different values is all that really matters.

Yeah, could very well be different software revisions. Youre right, point stand that the car targets higher temps fo reconomy purposes and lower temps when you "get on it." Do a pull on teh highway and youll see coolant temps DROP from ~230f to ~200f within a second or two... Anything within that range of 180-230f is normal.

[135i_Vert]

Originally Posted by kleach18

I use the torque pro app on my phone and a OBD2 bluetooth adapter and while on the highway I see temps at about 210F and while playing around I see temps as high as 225F(which I'm wondering if that's okay). My oil temps never get higher then 250f thought.

Could you turn off/reset thrown CEL codes (due to downpipe(s)) with this magical Bluetooth device that I'm just now hearing about lol!?

[blue135]

bNks334 - perhaps you are right about some thinking the Oil temp gauge has some ability to read coolant, as well. Others of us use aftermarket schemes to get the readings. I run Scan Gauge II in my vehicles and can read coolant temp and a myriad of other things from the OBD II port. So my numbers are more digital and exact than the dash gauges (whether that be oil or coolant).

[McPurrs]

Originally Posted by RnmEvo9

210 degrees fahrenheit for Coolant
240 degrees fahrenheit for engine oil

This is what I see too.

[2008135i]

Oil temp from about 220-230...

[inevitab1e]

Oil temp between 205f - 220f. Stop-go traffic is when the temps go up.