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View Poll Results: Model Year & Configuration (F80 / F82, OEM hubs ONLY) | |||
2015 Stock Tune - No Failure | 65 | 15.85% | |
2015 Stock Tune - Failure Confirmed | 7 | 1.71% | |
2015 Tuned - No Failure | 109 | 26.59% | |
2015 Tuned - Failure | 8 | 1.95% | |
2016 Stock Tune - No Failure | 54 | 13.17% | |
2016 Stock Tune - Failure Confirmed | 3 | 0.73% | |
2016 Tuned - No Failure | 46 | 11.22% | |
2016 Tuned - Failure | 6 | 1.46% | |
2017 Stock Tune - No Failure | 49 | 11.95% | |
2017 Stock Tune - Failure Confirmed | 6 | 1.46% | |
2017 Tuned - No Failure | 45 | 10.98% | |
2017 Tuned - Failure | 12 | 2.93% | |
Voters: 410. You may not vote on this poll |
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03-20-2019, 08:28 PM | #89 | |
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03-20-2019, 08:54 PM | #90 | |
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The hub was designed this way because the engine has no removable front timing cover. It was cost vs production reason making assembly easier the way they designed it that's all. I've also verified this with a bmw engineer. |
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03-20-2019, 09:01 PM | #91 |
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Yeah that's certainly a fair point. But the idea of a fail-safe is to reduce damage, not circumvent it entirely.
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03-20-2019, 09:47 PM | #92 | |||
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The argument I made concerning the revisions is that this limit is too low and can occur in stock vehicles. I think this a point that we agree on, but in different words. Quote:
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No offense, but I call bullshit. I believe you spoke to a BMW engineer at the dealer, like many of us have. But I highly doubt you spoke to an engineer with the qualifications and clearance to discuss the design of the crank hub w.r.t. failure rates, engine building/design, and production engineering. In a company like BMW, these tasks will be spread across several working groups. Lastly, I know it is comfortable to simplify complex matters into one line responses that are easily palatable, but often times the causes to detrimental failures in complex systems are... more complex. Specifically, to suggest that the design of something like the crank hub is only subject to constraints on cost and production is just naive - sorry. |
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03-20-2019, 10:00 PM | #93 | |
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You clearly dont know what you're talking about in this particular area or my background. The dealer part was pretty funny, bahahaha. I feel no need to go into deeper detail about it. I think you're just looking to argue at this point, a type of person that just wants to try to prove his/her point when there isn't even a point to prove anymore so I will let you do that. I'm not sorry. |
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03-20-2019, 10:06 PM | #94 | |
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05-02-2021, 10:25 AM | #95 |
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I don't know the whole details, but someone in the DC/Maryland/Virginia Bimmerpost group who has just a crank bolt capture just spun his crank hub. Here's from the owner:
"I have upgraded turbos and everything else you can name. I have had the CBC since the day I bought the car. And the only thing I can think of is earlier today I launched the car on a green light. But nothing happens. Drove home. Then around. Then started the car and bam codes. Limped it home like 3 miles away." "And yes I have the Vargas GC. Making 630whp on pump" Attached are the codes that came from the car.
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05-02-2021, 11:32 AM | #96 | |
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05-02-2021, 11:55 AM | #97 | ||
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Thanks for clarifying. The owner is going to keep us updated, will know more in a couple weeks once it's in the shop etc.
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05-02-2021, 05:31 PM | #99 | |
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Going by first hand experience with a blown engine and the same trouble codes. Both intake and exhaust camshafts would be out of range with an SCH. |
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05-02-2021, 06:25 PM | #100 |
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+1 to what FriedPiston said. That and the lean AFR codes point to a tune that's riding on the edge.
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