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      06-30-2018, 05:11 AM   #1
pipjroberts
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M2 Break-in Period - How strict?

Hello all,

Just wondering how strict one has to be regarding the running in period. I've heard and read plenty of articles that the engine should be kept below 5500rev/min until the running in service has been completed.

I've done about 150 miles so far and have exceeded 5500rev/min a few times (but always when the car is warm). I have a powertrain background so know how important break-in is so I'm inclined to build up the revs and load over time. However, excursions over 5500rev/min should harm the engine.

I'd be keen to hear other people's opinions and what their driving styles were like during the running in period.

Cheers,

Phil
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      06-30-2018, 05:53 AM   #2
randyt
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As you say, lots of differing opinions on this. I tend to the conservative side. Going easy allows for minimal component stress and even wear during bed in.

I love my 2018 LCI. I plan to keep it for a while and hopefully this will help in the long run. It certainly won't hurt.

Seems to me that proper break in is cheap and easy insurance.
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      06-30-2018, 07:51 AM   #3
robmx
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I’m at 860 miles right now and I’ve not exceeded 5500rpm yet, but have been close a fair few times. I’ve just been steady with my right foot, easing the power on. From my reading though, it looks like the main concern for run in is the diff, so I’ve been careful to be easy on that when accelerating out of tight corners etc. Although I have felt the rear skip once or twice.

For me break in has helped me learn the car, coming from a Golf GTi, I needed time to get used to the extra power and drive train anyway.
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      06-30-2018, 09:55 AM   #4
pipjroberts
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Sorry, my original post meant to say "excursions over 5500rev/min shouldn't harm the engine".
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      06-30-2018, 10:43 AM   #5
M2Andy
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I sit in the camp where within reason, giving it a bit of welly once everything has had a chance to warm up is ok in my book. I’m not saying I’d be driving sideways out of the dealership or red lining in the first couple of hundred miles but so long as the load is varied and you’re not sat on motorways with cruise control on then I think you should be ok. Saying that though, I hadn’t given to much consideration to being kind on the diff but time will tell.
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      07-01-2018, 02:14 PM   #6
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I've been kind to the engine over it's first 200 odd miles, not been over 4.5k yet nor anywhere near full throttle. I think it's probably better over to build up to a few harder pulls beyond 5.5k rpm rather than just staying under it for 1200 miles. As others have said I can't see mine going anytime soon so I'd rather just be mechanically sympathetic so going over 5.5k will be few and far between. I'm just trying to get the boring miles out of the way ASAP!
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      07-01-2018, 04:46 PM   #7
RobbieLeeDobson
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As everyone, I've heard mixed feedback regarding this topic. I personally have generally took my time so far over my current 900 miles. One thing I've always ensured is that the engine is thoroughly warmed through. I wont lie, there has been a handful of occasions that I have changed up a gear between 5,500 and 6,000 RPM, to then instantly feel guilty as those BMW M2 handbook run in words haunt me, haha. In all seriousness, I doubt that as long as the engine has been fully warmed up, the odd time you've exceeded 5,500 rpm, will do any harm.

Either way, like you, I'm excited to hit the 1,200 mile run in service!
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      07-01-2018, 05:10 PM   #8
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Don't baby it too much but also, as mentioned by yourself and others, gradually increase your max rpm.... by something like 200rpm every 200kms until you're hitting that 5500 limit by break in. And never go over about half throttle during the break in.... but even after the break in, I dont go too crazy redlining it much until about 5000kms but that's just me. I also agree that the break in is mostly for our differential and other components more so than our engines
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      07-19-2018, 04:21 AM   #9
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Kick it's head in.

These are performance cars designed to be used
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