THE M3 IS GETTING THE ANRI BUILD TREATMENT - Blown headgasket to build thread

[ChapterM3]

No real update to report - took it out in the canyons a couple weekends ago, coolant temp was at 72 degrees the whole time, car f*cking rips. Went to Staples the other day, came out and just love my car, so I took this picture. There's something going on with one of the brake sensors I think under the ABS module, got code 5E265 Control Unit: voltage supply, sensors - and my DSC and BRAKE light are on, but then they go off sometimes. It'll get figured out but for now, I'm just loving my M3 and thought to share. Sometimes I think about what new car would I get besides this? And the answer is, I wouldn't. There simply is no replacement for this amazing vehicle, I love this platform so much. Happy Monday guys!

[sapote]

Could sometimes be possibly running in certain specific situations if the correct parameters were met at some point in time.

Right, when car is traveling at higher speed with good air flow through radiator, but as OP reported that at speed the coolant was only 78C and so no reason for the clutch fan to lock at this cool temperature to cause the fan noise. So it must be the case that car moving at slower speed and the efan running with AC on.

OP said "and 78 C degrees while driving. "

[bigjae46]

George,

So efan running with AC on in hot summer is not fact?

Could sometimes be possibly running in certain specific situations if the correct parameters were met at some point in time.

[sapote]

My concern is that spreading false information as fact.

George,

So efan running with AC on in hot summer is not fact?

[Anri]

[QUOTE=George Hill;n275033]
My concern is that spreading false information as fact (whether on purpose or not) does a disservice to the community and some members may not realize and then regurgitate it as fact.
[/QUOTE]

Sorry, had to bold your thought.

[ChapterM3]

I see what you did there, lol.

My concern is that spreading false information as fact (whether on purpose or not) does a disservice to the community and some members may not realize and then regurgitate it as fact.

*Edit, this is my last post on the thread though. I'm super glad that this has turned out favorable for the OP, that is not always the case anymore.

Yeah man I totally hear you - I appreciate your input though as always, and please don't take my post as somehow dissolving the conversation - I am 100% with you to not have disinformation going around, just wanted to make light of it!

[George Hill]

... when things got heated...

I see what you did there, lol.

My concern is that spreading false information as fact (whether on purpose or not) does a disservice to the community and some members may not realize and then regurgitate it as fact.

*Edit, this is my last post on the thread though. I'm super glad that this has turned out favorable for the OP, that is not always the case anymore.

[ChapterM3]

Alright y'all, that was fun - I'm gunna do what the Olympics announcer guy did at the beach volleyball court when things got heated to clear the air

https://www.youtube.com/watch?v=ugrAo8wEPiI&t=42s

[bigjae46]

Yes, you are wrong to say that. You do not know which fan was running. You literally said he's wrong and you are right even though you aren't there while he is. Just because the A/C is on doesn't mean the e-fan is on. /thread.

Bruh...I thought you would have learned by now. I'm a little disappointed in you.

Hahahaha

[sapote]

Yes, you are wrong to say that. You do not know which fan was running. You literally said he's wrong and you are right even though you aren't there while he is. Just because the A/C is on doesn't mean the e-fan is on. /thread.

With the AC on in hot summer, it's 100% sure that the efan was running, unless his AC broke.

Also we are not sure what OP said about hearing the clutch fan running with AC turned on -- was he idling, in traffic jam, or driving at high speed. I don't think the clutch fan is audible at 850rpm idling even if it is total locked up. But I'm sure we all care hear the efan running at high speed with AC on in the hot summer.

[George Hill]

He wrote: "- with the Sachs fan clutch you can hear with the windows closed with A/C on"
No one saw the clutch fan spinning fast while seating inside with window closed. And with the AC on, I'm sure the efan was running fast and so how one be able to say the it is the noise from the clutch fan.
Here is what I wrote in response to OP: "What you heard is the efan running and not the clutch fan. "
Am I wrong to say the efan was running with that noise and not the clutch fan?

Yes, you are wrong to say that. You do not know which fan was running. You literally said he's wrong and you are right even though you aren't there while he is. Just because the A/C is on doesn't mean the e-fan is on. /thread.

[sapote]

And without data to back an opinion up its silly to say someone is wrong in what they actually witnessed, lol.

He wrote: "- with the Sachs fan clutch you can hear with the windows closed with A/C on"
No one saw the clutch fan spinning fast while seating inside with window closed. And with the AC on, I'm sure the efan was running fast and so how one be able to say the it is the noise from the clutch fan.
Here is what I wrote in response to OP: "What you heard is the efan running and not the clutch fan. "
Am I wrong to say the efan was running with that noise and not the clutch fan?

[Anri]

Hi sapote

Please re-read your post replies
and find yourself were you went
wrong.

Reverse engineer and correct yourself,
find on your own were you went wrong.


Regards,
I gave up..

[bmwfnatic]

The IHKA will command the e-fan on based on a number of factors, one of those is system pressure, the other is it will always come on when set to max cooling (temp and fan speed).

The other way is the e-fan is commanded on by the DME when the radiator outlet temp is too high. I don't know what that temp is but I assume its between 90-95*c. Essentially the DME is expecting the radiator to do its job with just air flow or when the clutch fan is locked up. IF those can't keep up the outlet temp will increase and then the DME kicks the e-fan on to supplement.

Both the IKHA and the DME provide a % fan speed value and the DME picks the higher number of the 2. At 90C outlet temperature the DME already wants the fan at 100%. But it’s a gradual increase prior to that based on outlet temp.

[George Hill]

Doesn't the fan just come on based on the temp switch assuming the A/C is not running? it doesn't matter the increased flow (which is lower temp) but the actual temp of the fluid. What is the temp rating of the switch?

The IHKA will command the e-fan on based on a number of factors, one of those is system pressure, the other is it will always come on when set to max cooling (temp and fan speed).

The other way is the e-fan is commanded on by the DME when the radiator outlet temp is too high. I don't know what that temp is but I assume its between 90-95*c. Essentially the DME is expecting the radiator to do its job with just air flow or when the clutch fan is locked up. IF those can't keep up the outlet temp will increase and then the DME kicks the e-fan on to supplement.

Anri's Tstat and associated fan clutch should keep the engine at a lower temp. So if the radiator drops (as an example) 15* from the inlet to outlet then Anri's setup should have even more room before the e-fan would turn on because it started at a lower temp as well *in theory. BUT all of this is conjecture as we don't have any data. And without data to back an opinion up its silly to say someone is wrong in what they actually witnessed, lol.