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

[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

[Nate047]

Nice update, glad things are working out favorably!

[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?

[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.....

[sapote]

You have 0 data that says a lower temp thermostat increases the flow volume through the rad causing a decrease in performance.

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

[George Hill]

Its odd to me that you would tell the OP who literally was with the car making an observation that he is wrong because of an assumption you have. You have 0 data that says a lower temp thermostat increases the flow volume through the rad causing a decrease in performance.

[sapote]

Assuming the outlet temp is to high because the inlet temp is lower is a an odd conclusion.

Not odd.
factory Tstat with higher T inlet but less flow rate, so the outlet T is lower.
70 Tstat: lower inlet T but higher flow rate, so more total heat flows through the radiator per time (this must be true as this is the only way to lower the engine T), hence outlet should be higher T in average compared to factory Tstat case.
The fans removed more heat with 70 Tstat, but there is no reasons that they so much heat that the outlet is lower average temp than when with factory Tstat.

Look at another way:
Factory Tstat: it mixed 20% from rad outpet + 80% from hot coolant of the head, and the total flows back into the pump.
70 Tstat: it mixed 30% from rad outlet + 70% from the hot head, and total flows to the pump. So the outlet sensor sees more (in time) hot coolant than the factory setup.

[0-60motorsports]

Nice updates bud. Enjoy

[Tbonem3]

Sapote and "odd" ?

[George Hill]

What you heard is the efan running and not the clutch fan. 70C Tstat allows more hot coolant to flow through the radiator/sensor so it triggered the efan to run more often.

That is an unreasonable assumption to make without any data. The electric fan is activated if needed by the A/C system and/or the coolant exiting the radiator outlet is "too hot." Assuming the outlet temp is to high because the inlet temp is lower is a an odd conclusion.

[EthanolTurbo]

UPDATE - First oil change after I drove the car 5,000 miles -

This past Sunday Anri and I met up to get the first oil change done on the car after I put 5k miles on the car since the initial break-in oil.

Here's what happened / work was completed -
- NO oil has burned in the car, which I know has been a thing for other built engines - So happy to report that my motor is exactly as I like it, no added oil between oil changes.
- Anri also installed his new concept: a 70-degree C thermostat, to prevent the engine from getting heat-soaked
- Works fantastic - with the Sachs fan clutch you can hear with the windows closed with A/C on
- The Bimmerworld braided brake lines I had installed in the front were unfortunately rubbing so much so that the braided line had a hole in it, luckily the rubber was fine, but these were replaced with a fresh set from Bimmerworld which featured a new grommet that they developed which fits now perfectly in the stock holster for the line
- I took a sample of the oil for Blackstone and shipped it out, so I'll post those results when I receive it back

Now the car runs in the temperature range that is optimum for engine performance before the engine is heat-soaked. Before with the stock setup, I would actually feel this heat soak happen around 90-93 C degrees which I thought was normal and now with this new setup, that feeling never hits anymore. I swear that the torque curve is different now.

Results so far -
- The new 70-degree thermostat is incredible. In 105 F degree heat with the A/C blasting, the car is sitting cooly at 83 C degrees at maximum in bumper-to-bumper traffic, and 78 C degrees while driving. Compare that to the factory thermostat with the Bear fan clutch, and the car was at 90-93 C degrees. The low-end torque is seat-of-the-pants noticeably different, I feel like the car has a new torque curve now which is quite impressive considering that is the only thing we changed on the car. I haven't been able to get it in the canyons yet but will hopefully this weekend and will post about that as well
- Clearly the front braided brake lines were gone as the brake pedal feels completely solid now, so taken aback by that and thankful we did them now. I replaced the stock rubber ones in 2019 with these braided lines, and yeah in 5 years they were worn

More to come as I drive the car but so far, so good!

161,013 - 5k after we did the initial break-in

Anri filling the coolant after doing the thermostat

Anri and his friend's GT3 that stopped by to help diagnose what happened after it just threw a check engine light

Oil filter after 5k - no metal shavings or anything!

Dipstick after fresh oil

Anri and my car finished for the day

More low end with the different thermostat? That is definitely unexpected.

[sapote]

Anri also installed his new concept: a 70-degree C thermostat, to prevent the engine from getting heat-soaked
- Works fantastic - with the Sachs fan clutch you can hear with the windows closed with A/C on[/ATTACH]

No oil consumption is amazing!

What you heard is the efan running and not the clutch fan. 70C Tstat allows more hot coolant to flow through the radiator/sensor so it triggered the efan to run more often.

[ChapterM3]

UPDATE - First oil change after I drove the car 5,000 miles -

This past Sunday Anri and I met up to get the first oil change done on the car after I put 5k miles on the car since the initial break-in oil.

Here's what happened / work was completed -
- NO oil has burned in the car, which I know has been a thing for other built engines - So happy to report that my motor is exactly as I like it, no added oil between oil changes.
- Anri also installed his new concept: a 70-degree C thermostat, to prevent the engine from getting heat-soaked
- Works fantastic - with the Sachs fan clutch you can hear with the windows closed with A/C on
- The Bimmerworld braided brake lines I had installed in the front were unfortunately rubbing so much so that the braided line had a hole in it, luckily the rubber was fine, but these were replaced with a fresh set from Bimmerworld which featured a new grommet that they developed which fits now perfectly in the stock holster for the line
- I took a sample of the oil for Blackstone and shipped it out, so I'll post those results when I receive it back

Now the car runs in the temperature range that is optimum for engine performance before the engine is heat-soaked. Before with the stock setup, I would actually feel this heat soak happen around 90-93 C degrees which I thought was normal and now with this new setup, that feeling never hits anymore. I swear that the torque curve is different now.

Results so far -
- The new 70-degree thermostat is incredible. In 105 F degree heat with the A/C blasting, the car is sitting cooly at 83 C degrees at maximum in bumper-to-bumper traffic, and 78 C degrees while driving. Compare that to the factory thermostat with the Bear fan clutch, and the car was at 90-93 C degrees. The low-end torque is seat-of-the-pants noticeably different, I feel like the car has a new torque curve now which is quite impressive considering that is the only thing we changed on the car. I haven't been able to get it in the canyons yet but will hopefully this weekend and will post about that as well
- Clearly the front braided brake lines were gone as the brake pedal feels completely solid now, so taken aback by that and thankful we did them now. I replaced the stock rubber ones in 2019 with these braided lines, and yeah in 5 years they were worn

More to come as I drive the car but so far, so good!

161,013 - 5k after we did the initial break-in

Anri filling the coolant after doing the thermostat

Anri and his friend's GT3 that stopped by to help diagnose what happened after it just threw a check engine light

Oil filter after 5k - no metal shavings or anything!

Dipstick after fresh oil

Anri and my car finished for the day

[ChapterM3]

Pic shows a vertical stick. Is it me only see it vertical with the texts in normal horizontal?

No noticeable oil consumption after 1700 miles is a very good news, and Anri had done a very nice job on the engine.

Gotcha - with my shoes on the floor, the stick is horizontal to the ground

But yes! No consumption so far, I'll be reporting it as time goes on with mileage as well

[discoelk]

Is he standing on a wall?