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

[George Hill]

I am sure I didn't say this in yesterday posts, that the 70 Tstat caused lower engine performance.

Decrease in RADIATOR performance. Since the electric fan is controlled by the A/C and Rad outlet temp. If the A/C wasn't causing the e-fan to cone on sooner, then only explanation would be the radiator isn't cooling as well (decrease in performance). Thus resulting in a higher outlet temp necessitating the e-fan.....

[digger]

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?

[Nate047]

Nice update, glad things are working out favorably!

[sapote]

Decrease in RADIATOR performance. Since the electric fan is controlled by the A/C and Rad outlet temp. If the A/C wasn't causing the e-fan to cone on sooner, then only explanation would be the radiator isn't cooling as well (decrease in performance). Thus resulting in a higher outlet temp necessitating the e-fan.....

I have not found a simple way to explain why the outlet is higher in average with the 70 Tstat. But here is one way to see this, based on energy.

So the outlet temperature is an indication of the residual energy (heat) on the radiator after the air ripped off some of the heat off. Let's assume we have no fans but a constant stream of air blowing at the rad -- just to make things simpler.
Do we agree that with more heat flowing into the inlet then the outlet is higher temperature in average? Or more heat went in the rad then it is hotter.

Then we must also agree that the 70 Tstat lets more heat flowing in the rad.

Then this means the 70 Tstat caused the rad to have higher temperature. It is not the rad losing its performance but .... you eat more then you gain more weight, based on energy theory

[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.

[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.

[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..

[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?

[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]

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.

[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

[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

[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]

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!

[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.