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      05-09-2019, 04:52 PM   #1
SDLionM6
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Smile BMW Replaces M6 Engine After Metal found in Oil and Scored Cylinder Walls

Went through a Crazy event with my 2014 M6 Coupe w/ CP past few months.

Running sluggish, complained to service manager for over a year about what I thought was turbo lag and they just didn't think there was a problem. Car Only has 20K miles on it! Finally they called in their turbo expert to look at it. Ran tests, keep it for a week, found metal particle in the oil, changed the oil, told me to drive it for 750 miles and bring it back for further testing.

Brought it back and they said they found internal engine damage; scored cylinders, cylinder damage, metal particles in the oil, low compression, and after 2-weeks... I was told a New Engine was on order and Covered by My Warranty!!!

New Engine has been installed and I'm 280 miles into the 1,200 mile Break-In Period.

I was Very Impressed with Corporate BMW taking quick action and providing a replacement engine. However, I was told there is NO Warranty as there was no out of pocket costs to me for labor and parts.

When I go back at 1,200 miles I want to make sure the car is tuned properly to the M6 Competition Specifications. Other than that can anyone think of any other things I should ask or be aware of?
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      05-11-2019, 11:58 AM   #2
itzjoker
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Is it just me or am I seeing more threads about motors having to be replaced due to metal in the oil? I'm also seeing a few M6's for sale that already have the motor replaced. Searching for a M6 GC at the moment and this is scaring me a bit.
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      05-11-2019, 12:44 PM   #3
SixteenM6
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Quote:
Originally Posted by itzjoker View Post
Is it just me or am I seeing more threads about motors having to be replaced due to metal in the oil? I'm also seeing a few M6's for sale that already have the motor replaced. Searching for a M6 GC at the moment and this is scaring me a bit.
I think the vast majority of M6 cars have no issues at all. Sure some will need entire new engines if something goes haywire with the turbos, those things spin super fast and need to be carefully balanced from the manufacturer. Also, take into account that perhaps those cars that are presenting problems have been abused to the max with hi-revving cold engine take offs, launches, paddle shifting to red-lines, etc... hard to tell which ones were normally driven or abused.

I recently purchased mine, 2016 with 23k miles and there were no major codes thrown out, tires were still original in great shape, interior well taken care of, etc...

Have the car inspected by a professional before buying if you're too concerned. Most of these V8s will last a long time if they're not abused.
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      05-11-2019, 04:54 PM   #4
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My pennies worth on this... Don’t you think there are indications of “intended abuse” against even many on this forum’s members’ cars? Discussions about what after marked tune to use, with the question “what can’t be identified after removing”, are clear warning signs to me... We all know that it’s relatively easy to get another 50-100 hp out of these cars, the question is why didn’t BMW do it in the first place? In my mind the answer comes down to finding a balance between performance and reliability...

Naturally, the same question applies to almost any modern turbo engine. Since I’m not a mechanic, and even less so a tuning specialist, but my own rule of thumb would be to avoid anything with after market tuning, no matter whether still existing or removed, if on the market for any second hand high performance car. Try and establish an understanding of previous owner/s as individuals - I’m a firm believer that it’s not how BMW built the engine (tolerances between similar engines) but how we as users have used them.
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