Engine running hotter...bearings?

[07BSM328]

Have a 2012 e92 m2 with 60k kms on it, mods are gts dct map, test pipes and stg 2 engine map. Change the oil every 5k kms with 10/60. Have had the car 3 yrs now and the mods for 2.
Recently ive noticed my engine is running hotter, over the half way marker (100 in canadian cars) esp with spirited driving with lots of shifting. Def worse the hotter it is outside. If i tone down the drving and cruise along on the hwy itll slowly come back down.
Its always been rock solid at 100 no matter the temp outside or driving im doing till very recently. Is/would this be an early indication of bearing probs or just a need for coolant flush?

[squartus]

Could be just 4 year old coolant. Suppose to replace it every 2 years

[pbonsalb]

I thought the coolant was lifetime, like the trans and diff fluids. Only brake fluid is 2 year interval from what I have read. However, I changed coolant, diff and trans fluids at 60k and 6 years.

[Doc Oc]

Have you looked at your oil cooler? Maybe it got damaged and isn't as efficient as it once was. And yes, it could be a sign of bearing failure, but it could be a multitude of other things as well.

[Weyne Masters]

Bearing,doesn't warn oil,don't be freack

[kb9uwu]

Def your throttle actuator

[Doc Oc]

Originally Posted by Weyne Masters

Bearing,doesn't warn oil,don't be freack

Can't tell for sure but if you are trying to say that failing bearings don't create additional heat, you shouldn't post on this subject. While I doubt this is the case with op, many people have reported high oil temps before failure.

The article below isn't talking rod bearings per se but still applies.

http://www.machinerylubrication.com/...-failure-signs

[admranger]

One user here posted that he noticed his oil temp was running higher so he replaced his bearings. His old bearings looked like crap iirc.

Assuming your cooling system is in good working order, I'd start considering a rod bearing change.

[roastbeef]

did you recently change the brand of oil you are using? some people have reported using a 10w60 oil, but a different brand and noticing a slight jump in oil temps. maybe start with a coolant flush and start setting some money aside for bearings if the coolant change doesn't help.

[WiFiGuy]

FYI...Trans and diff fluid need to be changed every 30k.

[TomHudson]

60,000 km is low (37,000 miles). Doubt (but possible) it's bearings.

What is a stage 2 engine map? Lean gets hot....

[cmo_93]

Global Warming

[BimmerRookie]

Why in the world would bearing degradation increase operating temps? Don't start a scare people, there could be several factors contributing to his increase in operating temperature.

OP: try replacing coolant and check for leaks in system.

[Doc Oc]

Originally Posted by BimmerRookie

Why in the world would bearing degradation increase operating temps? Don't start a scare people, there could be several factors contributing to his increase in operating temperature.

OP: try replacing coolant and check for leaks in system.

Why in the world would failing bearings increase temps? Seriously? Bearings are prevented from contacting the crank journal by an oil (hydrodynamic wedge) wedge created when the oil system is pressurized. When the oil wedge between journal and bearing breaks down, it allows metal on metal contact, which causes increased friction, which creates heat. Why do you think machinists and mechanics use thermography as a way to monitor the health of a wide variety of bearings? But like I said in both posts, I doubt it is bearings, most likely a cooling system or oil cooler issue, but failing bearings absolutely increase temps and dismissing it out of hand is irresponsible. Read the link I posted.

[BimmerRookie]

Originally Posted by Doc Oc

Why in the world would failing bearings increase temps? Seriously? Bearings fail when the oil wedge between journal and bearing breaks down allowing metal on metal contact, causing friction which creates heat. Why do you think machinists and mechanics use thermography as a way to monitor bearing health? Like I said, I doubt it is bearings, most likely a cooling or oil cooler issue, but failing bearings absolutely increase temps.

Sure that minute amount of metal on metal contact creates friction, but enough to cause a large increase in operating temp? Yeah right....plus OP didn't even state by how much over his engine was heating, so we don't really know the scale of his issue (if there is one to begin with)

[e92zero]

I am the one that reported noticing the oil and coolant temp running hotter than before and it prompted me to change the bearings after I checked everything else. My bearings wasn't too bad looking though. After changing bearings, both the oil temp and coolant temp went back down to the 'cooler' range. They are still in the 'cooler' range 35k miles later now at 120k miles on the engine. Note I did not change anything related to the coolant system during the bearing swap. Others can draw their own conclusion. Op, I am not sure if your scenario is the same though. Good luck.

[Doc Oc]

Originally Posted by BimmerRookie

Sure that minute amount of metal on metal contact creates friction, but enough to cause a large increase in operating temp? Yeah right....plus OP didn't even state by how much over his engine was heating, so we don't really know the scale of his issue (if there is one to begin with)

Not sure what your point is? I suggested he check his oil cooler. Just made the statement that when a bearing starts to fail, temps do increase. That is a 100% fact. But don't take my word for it, read the article or Google it....then argue with them

[Doc Oc]

Originally Posted by e92zero

I am the one that reported noticing the oil and coolant temp running hotter than before and it prompted me to change the bearings after I checked everything else. My bearings wasn't too bad looking though. After changing bearings, both the oil temp and coolant temp went back down to the 'cooler' range. They are still in the 'cooler' range 35k miles later now at 120k miles on the engine. Note I did not change anything related to the coolant system during the bearing swap. Others can draw their own conclusion. Op, I am not sure if your scenario is the same though. Good luck.

Interesting. When you changed the bearings did you put the same weight/brand oil back in?

[e92zero]

Originally Posted by Doc Oc

Interesting. When you changed the bearings did you put the same weight/brand oil back in?

Nope, I did not. I went back to Castrol 10-60 after the bearing change from Mobil 0-40 before the bearing change. I sorta put in the history of how I run my car and the oil I used in the bearing change thread I posted. I will see if I can dig it back up again later.

[Doc Oc]

How long had you been running the m1 before you noticed the temp increases?

[8600RPM]

Originally Posted by e92zero

Nope, I did not. I went back to Castrol 10-60 after the bearing change from Mobil 0-40 before the bearing change. I sorta put in the history of how I run my car and the oil I used in the bearing change thread I posted. I will see if I can dig it back up again later.

This is why. 0w40 runs hotter noticeably than 10w60.used both for 30k miles and alternated sometimes and it was consistently hotter

[Mr. Liu]

Thicker oil also runs hotter, my temps went up after putting in LiquiMoly 10W60 then went back down after switching back to OEM twin power.

Also check your plastic oil line covers under the front bumper, if their cracked/etc could be restricting air flow.