[TheMidnightNarwhal]

Originally Posted by bbnks2

Thick oil does not keep oil cooler. Not sure why so many people keep posting that here... Thicker oil will always produce more heat.

People just don't understand that not all 40weight oils are the same. Some are thinner or thicker on the "weight" scale. Some 0-40wt oils can be THINNER at operating temperature, or on a cold start, than a 0-30. Oils viscosity flexes with temperature and no 1 oil has the same temperature curve... formulation of the "base stock" can significantly impact an oils viscosity index.

Yeah that's I learned no to long ago.

So what is the point of this Weight standard if the oil are not the same viscosity with same numbers?

[bbnks2]

Originally Posted by TheMidnightNarwhal

Yeah that's I learned no to long ago.

So what is the point of this Weight standard if the oil are not the same viscosity with same numbers?

SAE grades are a range... oils with similar properties are grouped together. 0-30 means the oil has an SAE grade of 0 at 0f and an SAE grade of 30 at 210f... Two specific temperatures along a much broader curve...

https://www.jcmotors.com/images/unde..._viscosity.pdf

The point was that a thicker oil will never produce less heat lol... I was just trying to give insight into why people might see lower temps with one oil vs another. Realistically, these people are probably not seeing any difference and it's all in their head. Our cars vary cooling temps constantly which can swing oil temps several degrees while sitting in traffic... It's not likely anyone has ever done any real (controlled) analysis to show their car ACTUALLY runs cooler with oil x over oil y...

[Pladi]

Originally Posted by bbnks2

SAE grades are a range... oils with similar properties are grouped together. 0-30 means the oil has an SAE grade of 0 at 0f and an SAE grade of 30 at 210f... Two specific temperatures along a much broader curve...

https://www.jcmotors.com/images/unde..._viscosity.pdf

The point was that a thicker oil will never produce less heat lol... I was just trying to give insight into why people might see lower temps with one oil vs another. Realistically, these people are probably not seeing any difference and it's all in their head. Our cars vary cooling temps constantly which can swing oil temps several degrees while sitting in traffic... It's not likely anyone has ever done any real (controlled) analysis to show their car ACTUALLY runs cooler with oil x over oil y...

This is very true. The effects of oil cooling have to do with oil flow. The more flow the more cooling. However oil in general is not the primary cooling method. ITs the coolant and water pump.

[j_internet]

Originally Posted by Jeyoller

Not sure whether or not they'd be tearing it apart completely since it'll be a warranty claim but it actually just sounded like belt tensioner / pulleys when i took it in (plus some suspension issues which was my main concern for the warranty claim) and it turned out to be coming from inside the engine.... so im patiently waiting to hear back from them now

Did you ever find out what the issue was ?

I had a 2014 X5 N55 46,000 miles and had the motor replaced due to metallic rattle I heard around 2000 rpm when stepping on the gas.

I have a 2011 X3 N55 49,000 just waiting to see ….

[GreQonE]

So, my E92 LCI '2011 2 days ago stopped on an highway.

I lost all oil, check engine with 3 cylinders disabled.

72k KM of mileage.

Waiting on the diagnosis from my shop, I don't expect anything minor...

[9krpmrx8]

Lost all oil? So you hit something? Turbo oil line bust?

[GreQonE]

Originally Posted by 9krpmrx8

Lost all oil? So you hit something? Turbo oil line bust?

Didn't hit anything, not at least anything that I would be aware off

I am still waiting for diagnosis

List of codes: 2BC0, 2BF8, 2C01, 2EE0, 2EE4, 2EED, 2EF4, 2EFE, 2EFF, 2F04, 3406
And shadow codes: 2BDE, 2BF0, 2C42, 2EF7

[TheMidnightNarwhal]

Originally Posted by GreQonE

Didn't hit anything, not at least anything that I would be aware off

I am still waiting for diagnosis

List of codes: 2BC0, 2BF8, 2C01, 2EE0, 2EE4, 2EED, 2EF4, 2EFE, 2EFF, 2F04, 3406
And shadow codes: 2BDE, 2BF0, 2C42, 2EF7

Do you know how you lost the oil or not yet?

[GreQonE]

Originally Posted by TheMidnightNarwhal

Do you know how you lost the oil or not yet?

As I have said, not yet

I have a little bit of my hopes up, as even the truck that hauled me was covered in oil after the hauling and damaged block would mostly just spit out the oil almost instantly and produce a lot of smoke in the process

[GreQonE]

Diagnosis is complete:

Connecting rod blew through the engine block

[Pladi]

Originally Posted by GreQonE

Diagnosis is complete:

Connecting rod blew through the engine block

Were u running heavy boost ? Tuned ? What tune if so ?

[GreQonE]

Originally Posted by Pladi

Were u running heavy boost ? Tuned ? What tune if so ?

Stock turbo @ 366 HP and 655 nM
With supporting mods of cobb chargepipe, ams fmic, and cobb sport cats

So nothing major

bench tuned by my local shop

[9krpmrx8]

bench tuned = flash tuned?

[lwgrenier]

Originally Posted by GreQonE

Stock turbo @ 366 HP and 655 nM
With supporting mods of cobb chargepipe, ams fmic, and cobb sport cats

So nothing major

bench tuned by my local shop

655 nM?? Isn't that like 480 lb-ft? Don't even think that's possible on stock turbo... maybe why you threw a rod

Edit: Unless you're an n54. Still seems like a lot though.

[9krpmrx8]

Originally Posted by GreQonE

Stock turbo @ 366 HP and 655 nM
With supporting mods of cobb chargepipe, ams fmic, and cobb sport cats

So nothing major

bench tuned by my local shop

Also, when it went were you at low RPM, maybe driving on a hill or incline as well?

[Pladi]

Originally Posted by GreQonE

Stock turbo @ 366 HP and 655 nM
With supporting mods of cobb chargepipe, ams fmic, and cobb sport cats

So nothing major

bench tuned by my local shop

Let me tell you something my good friend.

I am the most outspoken critic of this platform.

You however destroyed ur engine most likely from a super knock or low speed pre ignition.

Rods dont fly out of these engine out of the blue. Its just impossible. So ur issue has nothing to do with this thread. It was running more boost timing for the fueling.

When rods come out it means there was a crazy amount of combustion pressure (uncontrolled). Nothing to do with rod bearings.

[MTK24]

Originally Posted by Pladi

Let me tell you something my good friend.

I am the most outspoken critic of this platform.

You however destroyed ur engine most likely from a super knock or low speed pre ignition.

Rods dont fly out of these engine out of the blue. Its just impossible. So ur issue has nothing to do with this thread. It was running more boost timing for the fueling.

When rods come out it means there was a crazy amount of combustion pressure (uncontrolled). Nothing to do with rod bearings.

I got a super knock code before. Scared the shit out of me.i had my jb4 to map 5 and it was over boosting to 18 psi on 92 octane. It kinda feels like the tranny is slipping when reaching higher rpm. The thing is, it doesn't trigger a CEL.

I set it to map 6 and put my own boost targets 13 psi and the code never came back.

These engines are strong. As long as your not super knocking over and over again I think most people should be OK?

[Pladi]

Originally Posted by Vampire335i

I got a super knock code before. Scared the shit out of me.i had my jb4 to map 5 and it was over boosting to 18 psi on 92 octane. It kinda feels like the tranny is slipping when reaching higher rpm. The thing is, it doesn't trigger a CEL.

I set it to map 6 and put my own boost targets 13 psi and the code never came back.

These engines are strong. As long as your not super knocking over and over again I think most people should be OK?

What we have to understand is that what happens in the combustion chamber is chemistry and sometimes very unpredictable. You can have a super knock and no damage. You can have micro knocks over time and damage will come in a different form such as loss of compression due to bad rings.

All it takes is one split second of all the right (bad)conditions to be true and a super knock can be catastrophic. Especially if it happens during the opposite travel of the piston (compression stroke, pre ignition).

so its better to be safe than sorry. I would not run 92 octane at 18 PSI with this engine since its a higher compression engine to begin with.

If i wanted to run that much boost id use E30, E85 or methanol and water sprayed directly.

These engines are pretty strong but they are not all exactly the same..Some will have stronger internals than others . Due to manufacturing tolerance and mass production not everything is checked 100 percent at all times. Such as the exact strength of each rod during production or other components. One engine will run strong with high boost another might not be capable of that. You dont want to experiment, in a way. I know i dont.

So its always a good idea to be on the safe side of things. The road to more power can be addictive and you end up being unreasonable with your engine expectations. Its a BMW its very strong ill add more boost then boom.

Then you come to this thread and try to empathize with people who had rod bearing fails on stock motors. lol

[GreQonE]

Originally Posted by 9krpmrx8

bench tuned = flash tuned?

That's correct, only difference is the process - ECU needs to be taken out like in 2013's N55s

[GreQonE]

Originally Posted by lwgrenier

655 nM?? Isn't that like 480 lb-ft? Don't even think that's possible on stock turbo... maybe why you threw a rod

Edit: Unless you're an n54. Still seems like a lot though.

//Let me know if you can't see the dyno chart

[GreQonE]

Originally Posted by 9krpmrx8

Also, when it went were you at low RPM, maybe driving on a hill or incline as well?

Just normal elevation without any noticable inclines/declines, 140 kmph set on cruise control

Originally Posted by Pladi

So ur issue has nothing to do with this thread

Apologies, just thought this is general N55 reliability thread. Timing corrections were picture perfect before going on the trip.

[lwgrenier]

Seems like a pretty aggressive tune... might have contributed to your blown motor.