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BMW 3-Series and 4-Series Forum (F30 / F32) | F30POST > 2012-2019 BMW 3 and 4-Series Forums > General F30 Sedan / F32 Coupe / F36 Gran Coupe Forum > Has Any F3x Owner Had A Crank Hub Failure?
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      11-30-2018, 03:52 PM   #1
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Has Any F3x Owner Had A Crank Hub Failure?

An (isolated) issue on the M F80/F82/F83.

Anyone had a first hand experience with a F3x or first hand knowledge of a failure?

It’s the same setup on both F8x and F3x
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      12-02-2018, 11:20 AM   #2
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I know you're looking for people with experience with the issue (not me), but my guess is that you won't find any on the F3x platform. You already know this, but I've only heard of this happening on S55's.

You say same setup, I'm assuming you mean same design not the same crank hub, right?
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      12-02-2018, 11:25 AM   #3
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Quote:
Originally Posted by rjdnyy224 View Post
I know you're looking for people with experience with the issue (not me), but my guess is that you won't find any on the F3x platform. You already know this, but I've only heard of this happening on S55's
Again, this thread is to try and find any F3x owner that has had the issue.

Trying to move from assumptions to facts

Facts better than guesses.
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      12-02-2018, 11:30 AM   #4
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Quote:
Originally Posted by rjdnyy224 View Post
I know you're looking for people with experience with the issue (not me), but my guess is that you won't find any on the F3x platform. You already know this, but I've only heard of this happening on S55's.

You say same setup, I'm assuming you mean same design not the same crank hub, right?
Quote:
Originally Posted by IK6SPEED View Post
Again, this thread is to try and find any F3x owner that has had the issue.

Trying to move from assumptions to facts

Facts better than guesses.
Agreed, which is why I prefaced my reply in a way that addresses that

Out of curiosity, you said that the same setup that is used in the S55 is used in the F30 engines, do you mean the same crank hub (like same part numbers) or the same design?
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      12-02-2018, 12:03 PM   #5
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Wasn't the commonality of the failure 7DCT & modded engines. There was also an after market HUB causing problems. Big flame war with Jason from TPG saying their hubs were OK even though the had a high failure rate.

Had a 7DCT on my Modded N54 with no issues. Lots of speculation on why no Woodruff key on the crank to lock the hub in place.

To answer the basic question have never seen a post of an F3X fail. Many happen but does not seem common.

Pictures from an old thread


Aftermarket TPG hub


Factory hub with stress cracks.

You have a problem with your car or just interested.
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      12-02-2018, 12:13 PM   #6
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Quote:
Originally Posted by BEAR-AvHistory View Post
You have a problem with your car or just interested.
Trying to separate facts from fiction.

More “common” in F8x.

Some believe it has to do with higher power yet some stock F8x have had issue.

As I have a higher power F3x, I’m doing due diligence.

Not trying to duplicate F8x discussion on issue. Looking for person(people) with first hand facts of a F3x issue.

F8x discussion for background or to discuss actual issue in tha thread.
https://f80.bimmerpost.com/forums/sh....php?t=1226184

One person claiming “plenty” of N55 affected.

So again, looking for first hand facts.
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Last edited by IK6SPEED; 12-02-2018 at 12:37 PM..
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      12-02-2018, 12:39 PM   #7
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Quote:
Originally Posted by IK6SPEED View Post
Trying to separate facts from fiction.

More “common” in F8x.

Some believe it has to do with higher power yet some stock F8x have had issue.

As I have a higher power F3x, I’m doing due diligence.

Not trying to duplicate F8x discussion on issue. Looking for person(people) with first hand facts of a F3x issue.

F8x discussion for background or to discuss actual issue in tha thread.
https://f80.bimmerpost.com/forums/sh....php?t=1226184

One person claiming of N55 affected.
Sounds good. My interest was drag racing a 400WHP+ 7DCT 2011-2014. Some of the DCT guys broke things, mostly in the rear ends & drive shafts but no hubs.
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      12-02-2018, 12:57 PM   #8
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Quote:
Originally Posted by rjdnyy224 View Post
Out of curiosity, you said that the same setup that is used in the S55 is used in the F30 engines, do you mean the same crank hub (like same part numbers) or the same design?
.
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Last edited by IK6SPEED; 12-02-2018 at 01:02 PM..
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      12-14-2018, 03:10 PM   #9
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