[QUOTE=EZZK;9059100]Not unless it’s broken.

 

[QUOTE=EZZK;9059100]Hmmm, how come my quote got translated to chinese on the forums?

 

never mind, I figured it out why, the person who quoted my post had auto translate on and it translated to their native tongue.

 

[QUOTE=JettaRed;9059308]I'm curious about engine mileage.
I had a w124 E320 M104, engine overhaul at 130000km, it's cast iron block.
M276 is made by aluminum, would it live longer than M104？
Just curious.

 

[QUOTE=EZZK;9060257]Why was it overhauled? And what do you mean by overhauled? A complete rebuild? I have 130,000 MILES on my 2014 C350 M276 NA and it runs fine. My 2015 SL400 M276 bi-turbo has 52,000 miles and runs well, too.

While the crankcase (block) of the M276 is made of an aluminum allow, the cylinders have cast-iron linings.

 

[QUOTE=JettaRed;9060282]The overhaul means grinding bore to eliminate wearing and deform inside cylinder, replace piston and piston rings, gaskets, grinding cylinder top and cylinder head surface for better airtight, replace main bearings and conrod bearings, check valve lift clearance, grinding valve seats...etc, many items on the list.
So there are iron cylinder sleeves inside M276?

 

[QUOTE=EZZK;9060302]Damn! You really did do an overhaul. Just wanted to make sure we were talking the same thing. Were you having engine problems at 81,000 miles? Was the motor oil ever changed?

The non-turbo M276 has cast iron liners and the turbocharged M276 has Nanoslide cylinder liner.

Non-turbocharged M276



Turbocharged M276

 

I apologise for reusing an old thread but I've got a couple questions about the m276dela30 if anybody has the time to answer.

Firstly, I'm wondering if the coolant circulation stays on after shutdown of the engine, to cool down the turbos?

Secondly, do MY2017+ M276s face the same oil in harness issues that older MBs have had? Is it worth the hassle of installing 4x sacrificial harnesses? -- FCP? I'm planning on adding those alone, waiting a bit for funds to rise, and then the CPSs and cam magnets themselves later on, if that's okay? I've got 77k miles on my 2017 E43. Is it an age or mileage thing, and why don't dealers recommend the service? Crazy how MB had 30 years to fix this (722.6)

Thirdly, are y'all's 9Gs real jerky between 1-2-3 gears? 1-2 is damn abrupt and 2-3 is almost rough sometimes. And the tachometer almost has a bounce to it between 2-3. Maybe I'm just not used to an auto that's so fast. Or, maybe my car needs a trans. fluid service or software update?

Fourthly, what are some best driving practices for the m276/9G specifically? What do y'all do in stop-and-go traffic when the trans. has to constantly go between 2-3 gear -- leave the car in second manually? Is there a sharp idle drop after a cold start that marks when best to set off? (my m156 would rapidly switch to normal idle after ~15 seconds, which is when I'd drive off)

And finally, anything that I should check/service that dealers generally won't do? My car was fully dealer-serviced every 10k up to when I got it at 76k miles.

I'd really appreciate it. I want to take my 2017 E43 to +200k miles or above. To be a trendsetter and all that.
Also, if anybody has a dealer service interval chart (what to be serviced, when) that would just be amazing.

 

Yes it appears all M27* and M157 engines eventually experience oil in harness. Sacrificial harnesses don't hurt and rather help. No clear trend on age vs mileage for the issue to show up.

Change the transmission oil.

 

Thank you. I'll purchase 4x harnesses on Monday. And I'll have my transmission serviced in the next 5k miles. Although being serviced by the dealer, I can't imagine they totally forgot to do it? Carfax shows that all recommended maintenance has always been done.

A part of me ($) hopes that it's either my driving style clashing with the prev. owner, or my car's early software revisions for everything, which I 100% assume for the TCU as well. But I'll get it done if necessary. Any way to know for sure, though?

 

One more question... I know I've asked a lot already... is carbon buildup a prevalent issue for our m276s? How about 2017+? As I understand, every GDI engine with enough miles will eventually have significant buildup, but at ~100k miles for instance, is it worth having it at the back of the mind? Any good tips for buildup prevention, and how does DI Jectron by Liqui Moly sound?

 

Yes, the M276.8 DELA 30 motor will get deposits on the intake valves. I have 149K miles on one of mine and it hasn't noticeably affected performance in any way.

I use the Berryman's 2611 intake cleaner injected into the intake manifold. I do it before every oil change.

 

Interesting alright. Is there a port on the intake manifold that you inject it through?

 

For your question on the coolant circulation, i have only noticed mine will stay on if i have been in S+ mode and beating on it then put it in the garage and shut it off. My oil temps and coolant temps were normal when i noticed it last, but the intercooler pump stayed running for about 2 min after shutoff, maybe the car saw high enough intercooler fluid temps that it kept it on.
@TwoC400s have you noticed a difference after the intake treatments? im at 100k and have not done that on this car, was considering getting a borescope and checking at some point, but i dont hear of anyone in these forums doing any walnut blasting like the bmw/vag community does every 30k miles lol.
I will say our pcv system must be really well engineered because i never see any traces of oil in the inlets of the turbos where the pcv vents.

On the trans topic, have you done the peddle reset since you have had the car? Also i think 60k is the change mileage, so if you are at 76, i would do it soon.

 

M276.8xx 3.0 Turbo has very good PCV system, double stage the one in the middle of the V-bank is the 2nd stage, much better than M276.9 3.5NA.
But there will be carbon build up at intake valve, albeit very little. We GDI-er do not escape the side effect of carbon build up.
Our air intake track is dry from oil trace, that is true.

Here is a bit over 20,000 miles or 33,000KM ish.there about.



.




Intake tract is very dry



This is not liquid oil, its a thin film oil trace


.



.





Watch the video, the carbon build up on a C43
https://mbworld.org/forums/e-class-w...omparison.html

.




This is the 2nd stage PCV. The long one on the right. The round one on the left is the basic centrifuge



.


.

 

I suggest you to go to someone with Star diagnostic or go to dealer and ask for latest TCU firmware update if you want to get rid off from the jerkyness, i got that jerky too and dealer installed latest update and that gone but i kind of miss that... haha

i've changed that 7k km ago as preventive suggested from Cali but i regret i did not changed the other part that clips into this PCV..

and here is my carbon build up car is 131k km and its driven only with 100RON fuel (shell v power)

 

That is not bad at all for a 131,000KM engine , I mean the carbon build up is very little for that mileage.
.

 

i guess because of the fuel that i put always and that the car was beaten all the time

 

That is pretty clean! The constant Italian tuneup must have helped greatly!

 

well less or more it should help but everything have pros and cons haha

P.S. does c43 engines have check valves behind the chain tensioner anyone knows? as i read mixed comments and initially i thought we do but now im not really sure

 

Good question, wait for the experts to chime in to answer your question : )

 

Supposedly all M276.8 3.0 or 3.5 turbo already have the check valve for the timing chain tensioner. It is newer than M276 NA
The older M276 3.5NA some earlier years NEED and have the TSB to get their check valve installed FOC.

 

thank you MS for pointing out that as i initially thought we do as you mentioned but I do found some TSB here and there and i was confused if we do at all..

 

Much appreciated for confirming for us : )

 

YOU COULDN'T HAVE BEEN MORE RIGHT. All of my transmission issues were resolved with a firmware update. It's awesome.

Separately, what is the correct operational oil temperature range for the m276tt? I was on my limiter (130mph) for a good 10 seconds or so and I looked down... my oil temp was almost 233F????? Not even on my M156 have I seen oil temps that high. My average daily drive in comfort through hot ambient temps is around 200F. It seems to have gotten hotter after my oil change with Molygen.

And if I did the oil solenoid mod... my oil temps would go even higher? That seems just awful to me even though I really want to do it.