Poll......operating temps( water) using our OBD trick

[jrkoupe]

Id like to see your operating(water) temps..Im very curious as I believe there is a large range( Ive searched this for weeks)

Please state:

1)yr
2)model
3)mods to engine/cooling sys
4)idle for 5-7 mins minutes....warmed up
5)stop and go traffic
6)highway cruise
7) ambient temps


use this method Id prefer use we all this same method..if poss..)



https://www.bimmerforums.com/forum/s...es-in-your-car

[Vintage42]

Id like to see your operating(water) temps..Im very curious as I believe there is a large range( Ive searched this for weeks)
Please state:
1)yr
2)model
3)mods to engine/cooling sys
4)idle for 5-7 mins minutes....warmed up
5)stop and go traffic
6)highway cruise
7) ambient temps
...

For the first three years of ownership, my temperature varied constantly and wildly across a wide range, from 170F coasting down long hills, to 185F in steady cruising, to 200F in traffic. It was entertaining to watch the ScanGauge mounted on my console.
But I am not answering all those questions because the variations were due to a bad thermostat. After I put in a new thermostat, the temperature stays at 206F or 207F in all seasons and driving conditions from slow to fast. Except when stuck in hot summer traffic, when the temperature will cycle from 210F to 204F as the electric fan goes on and off. The electric fan is my only fan.
The answer I have is that there should not be a large range, or any range, if the thermostat is working.

[ProductUser]

It's going to be 110+ towards the end of the week in Phoenix, so I'll have some data for you by the weekend

[BimmerBreaker]

Yeah in 115 degree weather some of the i6's will get pretty hot even if the thermostat is perfect, especially with a fan delete

[rf900rkw]

There is a reason you see numbers all over the place. It's because they are. In the Z3 line, US spec only, you have

Five different air flow paths/shrouds.



<EDIT> Sorry, six. Forgot about the early mech fan M44


Four different radiator matrix.

Four different coolant flow paths.

Four different coolant temp sensor locations, some measuring inlet, some outlet, some in between.

Four different temp thermostats, some computer controlled to lower inlet temp under load.


And that's just stock. Then you have aftermarket radiators, lower temp thermostats and fans, etc.

In addition, my experience with the S52 has shown that temps go up with load. Counter-intuitively go up with speed. Go up with A/C, Go up in traffic. Go up when following a single car closely.

Results from today.

1> 99

2> S52 roadster

3> yes. everything.

4> 84-86C A/C on and off

5> 81-86C * A/C on

6> 80-81C without A/C, 84-86C with.

7> ~100F

[jrkoupe]

cool....thnx..

more pls!

[ProductUser]

Here's my contribution

The attached chart shows stop-and-go traffic as well as freeways temp. The far-right of the graph shows the temps climbing to 213f with the engine off (0 RPM); temps were 208f with engine idling.

1)yr -- 2000
2)model -- M-Roadster (S52)
3)mods to engine/cooling sys - None. Completely Stock
4)idle for 5-7 mins minutes....warmed up - Yes (94f)
5)stop and go traffic - See attached chart
6)highway cruise - Yes (208f)
7) ambient temps - 107f (Humidity 8% Dew point 32f)
8) A/C off
9) Top-down

06202018_Torque_Data.jpgs52_06202018.JPG

[BimmerBreaker]

1) 2000
2) S54 swap
3) Mechanical fan delete, lower temp fan switch, electrical fan wired to oil temp (comes on around 100C), no fan shroud for electric fan
4) ~98
5) ~99
6) 105C with A/C, 99C with A/C off
7) 105F

Oil temps don't rise above 100C and the coolant temp seems to stay around 105C on the highway. Within about 30 seconds of turning the A/C off the temps drop 6C to ~99.