[thormessiah]

I live in Texas where it’s usually 95+ degrees even around 11 pm at night. My hood is usually hot enough to fry a couple eggs on it after just 5 minutes of light driving. Is there any other way to keep engine bay cool? I have a ARM 5 in inter cooler, 1 year brand new radiator, but I do have BMS DCI and removed the stock box and filter. Thanks

[Welcome to NBA Jam]

If it's not overheating and not exceeding 250F, your engine is running at the temperature it's designed to run.

[Fritzer]

Heat wrap, aftermarket oil cooler, bigger intercooler. Check out certain ducting mods to get better airflow like the aFe air scoops behind the kidneys, or something along the line of how Dinan made their ram-air intake by ducting extra air from the front left bumper grill, near the foglight.

[rawdog573]

Originally Posted by thormessiah

I live in Texas where it’s usually 95+ degrees even around 11 pm at night. My hood is usually hot enough to fry a couple eggs on it after just 5 minutes of light driving. Is there any other way to keep engine bay cool? I have a ARM 5 in inter cooler, 1 year brand new radiator, but I do have BMS DCI and removed the stock box and filter. Thanks

If you have mhd tuner you can target cooler coolant temps. On track mode I've seen around 200 degrees just normal driving. But I don't leave it there. I normally leave mine on sport so it targets around 220 or so normal driving

[Bimmer_Engineer]

Originally Posted by thormessiah

I live in Texas where it’s usually 95+ degrees even around 11 pm at night. My hood is usually hot enough to fry a couple eggs on it after just 5 minutes of light driving. Is there any other way to keep engine bay cool? I have a ARM 5 in inter cooler, 1 year brand new radiator, but I do have BMS DCI and removed the stock box and filter. Thanks

Are you wanting to keep it cool just for the sake of keeping the car cooler? I ask because if you’re looking to get your intake air temps down you might consider putting the stock air box back on...

[Bobocut95]

I would just watch your engine temps. If that is good then you should be fine.

[porsche959]

Probably going to get flamed on but removing the plastic undertray significantly reduces engine temp. At least I think I read that somewhere.

[tisdrew]

BMS has a cheap oil cooler thermostat in addition to the things everyone has mentioned. I would look into water-meth injection if you're open to that.

[thormessiah]

Thanks all! I will probably save up for the CSF radiator which is a big upgrade over the stock one

[nsjames]

Originally Posted by thormessiah

Thanks all! I will probably save up for the CSF radiator which is a big upgrade over the stock one

you can have the worlds most gigantic radiator ever, but the thermostat is still going to keep the engine at 200+ degrees.

the factory setup is perfectly capable of overcooling the engine.
the thermostat is what keeps the heat in the engine.


also, a better radiator isn't going to decrease underhood temps.
all that heat is still going to flow from the back of the radiator into the engine bay.
if you want cooler engine bay temps you need to vent the engine bay.

[mecheng77]

Originally Posted by nsjames

you can have the worlds most gigantic radiator ever, but the thermostat is still going to keep the engine at 200+ degrees.

the factory setup is perfectly capable of overcooling the engine.
the thermostat is what keeps the heat in the engine.


also, a better radiator isn't going to decrease underhood temps.
all that heat is still going to flow from the back of the radiator into the engine bay.
if you want cooler engine bay temps you need to vent the engine bay.

^This is correct.

Maximum efficiency is gained at higher temps. I would make sure your oil is full and you can remove the vanity cover. When the car is stone cold, use a garden hose to spray the radiator and evap fins.

From what I remember, driving in DS mode keeps the water temperature lower by running the electric water pump faster but you will lose efficiency. These cars have very intelligent cooling systems.

[1sicke92]

low temp thermostat, radiator, oil cooler, larger IC?

[thormessiah]

Originally Posted by nsjames

you can have the worlds most gigantic radiator ever, but the thermostat is still going to keep the engine at 200+ degrees.

the factory setup is perfectly capable of overcooling the engine.
the thermostat is what keeps the heat in the engine.


also, a better radiator isn't going to decrease underhood temps.
all that heat is still going to flow from the back of the radiator into the engine bay.
if you want cooler engine bay temps you need to vent the engine bay.

Would a vented hood be a better investment?

[Ozzie335i]

Originally Posted by tisdrew

BMS has a cheap oil cooler thermostat in addition to the things everyone has mentioned. I would look into water-meth injection if you're open to that.

Ding ding. I have the AD Engineering one, thought to be the happy medium between summer cooling and winter heating. Friday night going out for dinner it was 107 degrees out. While cruising at 85 mph the temp gauge on my ride was comfortably pegged at 210.

[Anthony199]

That might be the stupidest proposition you will hear but maybe putting a higher viscosity oil (5w40 instead of 5w30 if that's what you're using) will help with oil temperature. I'm not sure how accurate and effective this is so roasting is welcomed

[thormessiah]

Originally Posted by Anthony199

That might be the stupidest proposition you will hear but maybe putting a higher viscosity oil (5w40 instead of 5w30 if that's what you're using) will help with oil temperature. I'm not sure how accurate and effective this is so roasting is welcomed

Actually I also heard this from 2 guys who worked on my n54 about a year ago. They were using Rotella 5w40 because they said it ran a little cooler. I had my oil changed at a local store so they used 5w30 but I'll be using 40 from now on.

[nhhiep]

Originally Posted by Anthony199

That might be the stupidest proposition you will hear but maybe putting a higher viscosity oil (5w40 instead of 5w30 if that's what you're using) will help with oil temperature. I'm not sure how accurate and effective this is so roasting is welcomed

Would using 5w40 damage the engine in anyway? Instead of stock 5w30? I live Denver, so temperature can be from 0 to 100 f

[Anthony199]

Originally Posted by nhhiep

Would using 5w40 damage the engine in anyway? Instead of stock 5w30? I live Denver, so temperature can be from 0 to 100 f

No, definitely no harm. In the contrary actually, 5w40 is more viscous, so it would provide better lubricantjon in hotter climates. However, I am not sure about this statement either, but in freezing temps, it doesn't provide the best lubrication in tight areas on and during cold start/idle. BMW does recommend both oils in the manual, so just make sure it's a BMW long life 01 approved oil. Castrol edge, pentosin or liquy moly are all good. I get my liquy moly from FCP euro as a kit with the filter, and with the lifetime warranty, I buy a new kit, send the old kit with the old oil for 18$ back, and get the new kit price refunded to me, so it's 18$ oil changes haha

[zomski101]

Originally Posted by thormessiah

Would a vented hood be a better investment?

I got the seibon gtr hood and its no different. Only see the heat wave escaping. Maybe run e85.

[nsjames]

Originally Posted by thormessiah

Would a vented hood be a better investment?

if your goal is a cooler engine bay, yes.

I'm still not sure what your goal is here.

you talk about engine temps but then you talk about your hood being hot.

Your engine is designed to run hot, that's just how it is these days. IIRC the upper map for the thermostat is like 215.
twenty years ago that would have been the red mark on the gauge.

if your car doesn't overheat, it's fine and working just as designed.