Engine running hotter...bearings?

[e92zero]

Originally Posted by 8600RPM

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

That is not what I observed. When pushed hard, maybe. But for my driving style and usage, 0w-40 was noticeably cooler than 10w60 when I first started using it. After about 15k miles, then I noticed the oil temp and coolant getting hotter for no apparent reason and that was during the winter months where temp was significantly colder outside. I asked some questions in the mobil 0-40 thread over the course of a few months and checked everything that was suggested. After changing the bearing, the temps are even cooler than before when I first got the car and running 10w-60. So for my own observation, the bearing does have an effect on the temp. How significant the correlation is though is not something I have any scientific knowledge of proofing. Others can draw their own conclusion.

[Doc Oc]

So you ran 0w40 through multiple changes before any temp issues started?

[e92zero]

Originally Posted by Doc Oc

So you ran 0w40 through multiple changes before any temp issues started?

Yup yup.

[Doc Oc]

Originally Posted by e92zero

Yup yup.

Good to know. Do you have a coolant temp gauge? If so do you remember what your temps were reaching?

[e92zero]

Originally Posted by Doc Oc

Good to know. Do you have a coolant temp gauge? If so do you remember what your temps were reaching?

Yup, I have a stack gauge. I remembered it reached 215 on the coolant while temp outside was only 58. After the bearing change, I don't think i have seen the coolant went pass 205 even when it was over 100 outside. I have not touched anything in my coolant system through all this time.

[nholmes]

Originally Posted by kb9uwu

Def your throttle actuator

[Doc Oc]

Originally Posted by e92zero

Yup, I have a stack gauge. I remembered it reached 215 on the coolant while temp outside was only 58. After the bearing change, I don't think i have seen the coolant went pass 205 even when it was over 100 outside. I have not touched anything in my coolant system through all this time.

Wow...those were cruising temps or running hard? I got my gauge last fall so I haven't seen the temps when pushed hard in the dead of summer, but so far I've not hit 200, even running hard uphill in the mountains. Fan kicks on around 195 and it pretty much holds there.

[e92zero]

Originally Posted by Doc Oc

Wow....had you been running it hard? I got my gauge last fall so I haven't seen the coolant temps when pushed hard in the dead of summer, but so far I've not hit 200.

I never pushed my car hard, maybe just a sting up to redline here and there but never continuously. The reading that I posted earlier are from freeway cruising on flat ground. So in my opinion/observation, the change in the temp was pretty big before and after the bearing replacement. Although my bearings don't look that bad from the pics. I think I read other posters that have reported lower temp readings after bearing change as well.

[Doc Oc]

I did. Wasn't dramatic...but noticeable. I did use the same oil (5w40) before and after.

[Doc Oc]

There's a thread going here somewhere that MRF updates periodically with their bearing jobs. I remember some of those mentioning higher temps too if I'm not mistaken.

[Helmsman]

Originally Posted by e92zero

Yup, I have a stack gauge. I remembered it reached 215 on the coolant while temp outside was only 58. After the bearing change, I don't think i have seen the coolant went pass 205 even when it was over 100 outside. I have not touched anything in my coolant system through all this time.

Hi e92zero, thanks for the input on coolant temp. Would it be possible to give some more specifics on the oil temp increase i.e. roughly how much are we talking about vs the temp viewed as normal before increase?

Thanks

[Helmsman]

Originally Posted by 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?

OP, any updates on this?

[JRV]

Interesting I definitely noticed overall cooler temps by eye. Before I replaced the bearings I used to easily run past the middle mark on the gauge for most of my drive and now it sits in middle around 210 with only occasional bump up when idling and stopping a lot and then it comes back down. It's definitely noticeable but what I wasn't sure about was wether that did it or the switch to Amsoil 5w-50 or a combo.

[e92zero]

Originally Posted by Helmsman

Hi e92zero, thanks for the input on coolant temp. Would it be possible to give some more specifics on the oil temp increase i.e. roughly how much are we talking about vs the temp viewed as normal before increase?

Thanks

Hi,

I don't have a separate oil temp gauge so I don't have specific details to the actual temp. I remember it was to the right (over) 210 by maybe 1-2 needle mark before the change. And it's about 1-2 needle mark to the left (below) 210 after the change. Same cruising condition.

The other area that added to my suspicious of the bearing is I have an oil pressure gauge. And before the bearing change, my oil pressure was around 28-30 at idle. When I first switch over to 0-40, my oil pressure was around 40 at idle. That's a pretty noticeable drop in oil pressure. After the bearing change and back to 10-60, my oil pressure is back up to around 42.

Good luck.

[Helmsman]

Originally Posted by e92zero

Hi,

I don't have a separate oil temp gauge so I don't have specific details to the actual temp. I remember it was to the right (over) 210 by maybe 1-2 needle mark before the change. And it's about 1-2 needle mark to the left (below) 210 after the change. Same cruising condition.

The other area that added to my suspicious of the bearing is I have an oil pressure gauge. And before the bearing change, my oil pressure was around 28-30 at idle. When I first switch over to 0-40, my oil pressure was around 40 at idle. That's a pretty noticeable drop in oil pressure. After the bearing change and back to 10-60, my oil pressure is back up to around 42.

Good luck.

Thanks mate, appreciate the input.

[R_lara]

It's summer and it's very hot! Are you runing high octane fuel because When I run 100 oct it runs a tad hotter but not by much. I do have a VF Engineering bigger oil cooler and I poor in 10 liters of 10w60 Castrol TWS.