E85 Engine Temp Heating

[Z44D]

Hi,
Have someone experienced engine temp keep rising? It's for 07 E85.
Initially, assumed thermostat was the problem so changed. But, the problem is back.
What makes it more difficult is the heating does not occur all the type, only sometime.
When it's heating the engine fan is running max but temp keep rising.

 

[rsutoratosu]

Is the pump working ? if you do the radiator air bleed, itll start pumping, if it doesn't might be the pump.

 

[ph001]

This is an very common problem in the N52. You need to change the electric water pump asap. Do not drive the car in it’s current state.