Video of the electric water pump in action on my E70

[Crowz]

A made a video of the electric water pump on my E70 via monitoring it with the P3 gauge I added.

This shows proof of how the economy, normal and performance modes BMW uses with the electric water pump in action.

https://www.youtube.com/watch?v=XFpu...ature=youtu.be

[AlphaBetaX5]

Why does engine switch to normal and then performance mode when car hits a hill?
I know it requires more power, but wouldn’t the engine be generating engine power at that rpm and speed to overcome the climb?


I always wondered why my coolant temperature drops 10-15C !

Thanks for sharing.


Sent from my iPhone using Tapatalk

[Crowz]

Qsilver7 posted a great info page a few threads down covering the modes that the E70 uses for the cooling system. Hopefully he will chime in with it but I will go look and see if I can find it.

Basically its has 4 modes.

Economy - Very high temperatures with little room for coolant temp spikes. This gives you the best gas mileage and allows the car to do the best emissions wise.

Normal - The coolant temp is lowered to give a bit more room for coolant temp spikes and more power.

Performance 1 - The coolant temp drops drastically and power goes up even higher but mpg goes way down.

Performance 2 - Max cooling and max power.

[Crowz]

I searched for his post on that and couldn't find it. Hopefully he will chime in.

[Entropy]

Very cool. Thanks for posting. However, this can be done with a mechanical water pump and electric thermostat like most BMWs have. It’s all in the DME programming. Not so much an electric vs mechanical pump thing.