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      07-22-2014, 02:37 PM   #1
anom3
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6MT - Replacing flywheel - LUK vs OEM?

Hi.

So at some point in time, I will want to replace the clutch on my 07.07 production M3.

I know that around 09.08 BMW changed the design on the flywheel to address some of the noise concerns they were hearing.

So, as well as a new clutch kit, I will need a new flywheel.

I noticed there are a couple of options:

a) OEM
b) LUK ( http://www.ebay.de/itm/BMW-3-E90-E93...item43cb3bb550 )

Has anyone used the LUK flywheels before? Are the OEM's much better? Or essentially the same?

Anyone done a clutch change on a pre 09.08 and gone with a LUK flywheel instead of the OEM?

The LUK is about 35-40% cheaper BTW, that's why I am asking.

Thanks!
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      07-22-2014, 02:38 PM   #2
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Aren't OEM ones made by Luk?
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      07-22-2014, 02:38 PM   #3
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07.07! One of the first! I'd figure a way to work that into your license plate.

How many miles on that beauty?

Oh, and

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      07-22-2014, 02:43 PM   #4
m3ray
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Use nothing but OEM when it comes to the flywheel. These have to be precision machined, balanced and manufactured. This is a constant velocity part and any deviation from exact specs will likely cause serious damage.
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      07-22-2014, 02:43 PM   #5
anom3
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this is what i read as well.

but most of the posts talk about older M3's, not the E9X ones. so i am unsure.

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Originally Posted by tinman831 View Post
Aren't OEM ones made by Luk?
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      07-22-2014, 03:26 PM   #6
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Luk makes oem. On my 99M3, I bought the Luk for 1/2 the price.
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      07-22-2014, 03:34 PM   #7
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My only experience with LUK products was in my previous '05 G35 coupe. I changed the clutch(using OEM infiniti clutch) and flywheel(LUK dual mass flywheel). I drove the car for over 5,000 miles before selling it with no issues. The clutch was a little hard the first 2-3k miles but it got softer as it was broken in. I didn't notice any other difference between the stock and LUK flywheel. LUK flywheel's are advertised as OEM replacement and I think they do a good job. Not sure how it would be on your M though. Hope this helps a little.
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      07-22-2014, 06:57 PM   #8
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Keep in mind that just because the OEM maker is LUK doesn’t mean the off shelf replacement is made to the same exact OEM tolerances. This is a labor intensive job. Unless you can confirm (through part numbers) that it is exactly the same as the OEM flywheel I wouldn’t chance using it.

Penny wise, pound foolish.
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      07-22-2014, 11:45 PM   #9
anom3
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everywhere i see the luks come up it always lists both part numbers.

the luk internal one.

and the proper, matching, bmw oem one.

Original Ersatzteil Nr.: (Nur zu Vergleichszwecken)
2 283 820 | 21 21 2 283 820

thats off the ebay listing that caught my eye.

the bmw part number (21 21 ...) is an exact match to whats needed in the vehicle.

to further complicate things, its luk who 'invented' the dual mass fly wheel...

thats why i was hoping on catching someone who actually had one installed and their impression vs the oem.

Quote:
Originally Posted by m3ray View Post
Keep in mind that just because the OEM maker is LUK doesn’t mean the off shelf replacement is made to the same exact OEM tolerances. This is a labor intensive job. Unless you can confirm (through part numbers) that it is exactly the same as the OEM flywheel I wouldn’t chance using it.

Penny wise, pound foolish.
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      07-23-2014, 10:31 AM   #10
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Quote:
Originally Posted by m3ray View Post
Use nothing but OEM when it comes to the flywheel. These have to be precision machined, balanced and manufactured. This is a constant velocity part and any deviation from exact specs will likely cause serious damage.
That is a broad statement unless you have some insight on the manufacturing capabilities. There are plenty of places in the world that can hold tolerance very tight. Whether this includes flywheel manufactures and the capabilities of each manufacture, I am unsure. But I doubt only one manufacture can make a flywheel (probably more relates to is there a business case to support providing the flywheel to the market).
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      07-23-2014, 10:55 AM   #11
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Quote:
Originally Posted by happos2 View Post
That is a broad statement unless you have some insight on the manufacturing capabilities. There are plenty of places in the world that can hold tolerance very tight. Whether this includes flywheel manufactures and the capabilities of each manufacture, I am unsure. But I doubt only one manufacture can make a flywheel (probably more relates to is there a business case to support providing the flywheel to the market).
If you want to take the chance it’s fine. An ebay listing just copies the OEM information and posts in the ad. If you have ever been involved with a clutch swap on a BMW you know it is very labor intensive. I rather do the job properly with the right parts the first time. If not the correct, at best you would need to swap it out again…at worst serious damage. It’s the OP’s call but I wouldn’t trust to purchase such a critical component off ebay
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      07-23-2014, 12:04 PM   #12
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I like to do the job right with the right parts too, since I am the one doing the job and don't want to do it twice. But I also don't have money to burn and see no need to pay 50 percent more than is necessary for parts. So I research the part I need and then buy it at a good price.
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      07-23-2014, 12:04 PM   #13
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Quote:
Originally Posted by m3ray View Post
If you want to take the chance it’s fine. An ebay listing just copies the OEM information and posts in the ad. If you have ever been involved with a clutch swap on a BMW you know it is very labor intensive. I rather do the job properly with the right parts the first time. If not the correct, at best you would need to swap it out again…at worst serious damage. It’s the OP’s call but I wouldn’t trust to purchase such a critical component off ebay
Don't get me wrong, I am in agreement with you in regards justifying what you are buying off of EBAY and insuring you are buying something suitable for the car. But to say only OEM can build a capable flywheel is where I see a difference. Further investigation is indeed needed by the OP.
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      07-23-2014, 12:45 PM   #14
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Many people with 335's have used the Luk flywheel with success. There is absolutely no reason that you cannot trust the OEM manufacture of a part. Simply because it doesn't come from BMW means little. They are the inventors of the dual mass flywheel and they make all the dual mass flywheels for BMW. Why wouldn't you trust them? I would

Does it make sens that LUK would run two different manufacturing lines? One for BMW and one for private sale?
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      07-23-2014, 01:06 PM   #15
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Quote:
Originally Posted by BigBoosting View Post
Many people with 335's have used the Luk flywheel with success. There is absolutely no reason that you cannot trust the OEM manufacture of a part. Simply because it doesn't come from BMW means little. They are the inventors of the dual mass flywheel and they make all the dual mass flywheels for BMW. Why wouldn't you trust them? I would

Does it make sens that LUK would run two different manufacturing lines? One for BMW and one for private sale?
It is possible that BMW only accepts less tolerance, and when LUK manufacture them the ones that don't meet the tighter BMW specs are sold as LUK OEM like replacements.

Not saying that's the case, but food for thought.
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