Crank Hub Issue Master Thread: What You Need To Know!

[LINF83]

Insane performance crank hub one piece fix

[Mr.Sakhir Orange]

Hello!

I am new to the forum. I have bought 2016 F80 M3 Competiton about 2 months ago, it is used car, imported from US, with 18.000 miles on it. I bought it from an import company based here in Slovenia. Why am I writing this under this thread?

When I collected the car, the guy told me he allready got the M4 GTS tune on it and drove it like that for about 1000 miles, and there was no problems. I picked up the car and drove it home. While driving, after about 10km I got a message from Idrive, saying drivetrain malfunction. Called the guy back immediatly, and returned to him, he pluged OBD in and checked for faults... There was only one fault, saying ˝Torque overload˝or something like that... I googled the code and found on bimmerpost that its a failsafe that software does in case of high torque, means that car goes into limp mode, and stays there until you turn it off/on again. After we turned the car on again, everything was fine and we reset fault codes, and it never showed up again. But after that situation I made a decision to go to my tunner, and got the car back on stock software.

So after I drove the car for about 3.000 miles, my curiousnes couldnt let me sleep, I wanted to try out the tune from Pure turbos (stage 2). The next day I went to my tunned, who is Pure turbos dealer, and got a tune from him. ( I allready had empty downpipes, and straight pipe Meisterschaft exhaust installed when I bought the car). When I went for the first drive.. Jesus.. that thing was screaming power. Supposedly it has 550hp and 780nm of torque (hasnt been tested), also the shifts were even more aggresive, and when you upshift at high speeds, the cars rear end really moves, and you can fill it on the steering wheel.

So I drove it until now, and sometime in between, I stumbled uppon this thread. I gave it a read, it took me about 4hrs to get through all 30 pages of it. There are loads of theories, and none can be denied. I red all of them, and the only logical conclusion that I came up to is that, if you are going to own this car for a long period of time, and if you are going to invest loads of money into the mods, then you should buy the MAXIMUM PSI keyed crank hub, and just sleep in peace.

So in last 2.5 month of owning this car I have spend about 10k eur, into the mods allready. If you are interested in list of mods, I would be glad to write it down for you. Last night I ordered the Max PSI crank hub kit from SSR Performance, and will change it before I start driving the car this season.

Wow, I feel like Im in the AA meeting, and I should confess..
My name is Denis, and here begins my S55 Crank hub story.

[Fishbuddy]

Will the S58 have crank hub issues similar to S55?

[Bmwlmr99]

79,600 miles....stage 2 VF tune, full bolt on CSF intercooler since 28,000miles... no issues , no crank hub mod!!!!!!!!!!!!!!!!!!!!

[papasmurf_m3]

Originally Posted by MR_X

Didn’t see this in the thread and not sure if it has been discussed. So glancing over this thread and looking and some stuff, I gathered that the crank hub design is shared with other cars in the BMW line up. One thing I noticed from those other cars that shared the design is that the crank bolt has higher torque values and more rotation degree requirements than the S55. I’m sure someone brought this up before but wonder if they have torque their crank hub to a higher value.

Very nice detective work! I'm surprised nobody has responded to your comment yet?

This sounds reasonable. Adding more torque will certainly make it stronger. Who knows, could BMW have not set the torque high enough on the S55? Why would they put less torque on a more powerful engine.

What was the torque differences and the how many extra degrees of rotation we talking? This seems worth looking into.

[MR_X]

Originally Posted by papasmurf_m3

Very nice detective work! I'm surprised nobody has responded to your comment yet?

This sounds reasonable. Adding more torque will certainly make it stronger. Who knows, could BMW have not set the torque high enough on the S55? Why would they put less torque on a more powerful engine.

What was the torque differences and the how many extra degrees of rotation we talking? This seems worth looking into.

I compared the wrong engine. I was comparing it with the N54. Is the N55 that shares the same part numbers on every component of the hub itself (hub, bolt, washer and sprocket). The N54 has a very similar design and higher torque values and it does share the sprocket for the timing chain. The crank hub bolt itself is torqued the same between the N55 and S55.

[papasmurf_m3]

Originally Posted by MR_X

I compared the wrong engine. I was comparing it with the N54. Is the N55 that shares the same part numbers on every component of the hub itself (hub, bolt, washer and sprocket). The N54 has a very similar design and higher torque values and it does share the sprocket for the timing chain. The crank hub bolt itself is torqued the same between the N55 and S55.

Ohh ok. Thanks for the clarification

Welp I guess it back to coughing up 4 grand before I can add E85 and bigger turbos.

[F80GTS]

Originally Posted by fishfinder333

Will the S58 have crank hub issues similar to S55?

No that problem has been fixed on the s58 motor.

[NE_M3]

Originally Posted by F80GTS

No that problem has been fixed on the s58 motor.

Did they go back to a 1 piece crank hub?

[bioman]

No failures on the MaxPSI keyed crank hub?

[Walmart Parking Lot]

Originally Posted by bioman

No failures on the MaxPSI keyed crank hub?

Wondering the same thing

[JamesF80m3]

Originally Posted by bioman

No failures on the MaxPSI keyed crank hub?

I was told by a shop there was reports of max psi hub failures. Would rather not say no names as I dont want to get in the middle of a company and shop.

[HyeM3]

Originally Posted by HarrisoneliF82

I was told by a shop there was reports of max psi hub failures. Would rather not say no names as I dont want to get in the middle of a company and shop.

In the BM3 Facebook group there's a guy that posted today about a SCH while running a Max PSI hub. He wasn't able to confirm yet because it just happened but everybody says all the signs are pointing to a SCH

[JamesF80m3]

Originally Posted by HyeM3

In the BM3 Facebook group there's a guy that posted today about a SCH while running a Max PSI hub. He wasn't able to confirm yet because it just happened but everybody says all the signs are pointing to a SCH

Link to the post?

[Walmart Parking Lot]

Originally Posted by HarrisoneliF82

I was told by a shop there was reports of max psi hub failures. Would rather not say no names as I dont want to get in the middle of a company and shop.

Originally Posted by HyeM3

In the BM3 Facebook group there's a guy that posted today about a SCH while running a Max PSI hub. He wasn't able to confirm yet because it just happened but everybody says all the signs are pointing to a SCH

So maybe Gintani would be the best option?

[JamesF80m3]

Originally Posted by grgg33

So maybe Gintani would be the best option?

I'm running insane performance for the past 4 months and have had no issues. Catless downpipes and Stage 2 BM3 flash

[HyeM3]

Originally Posted by HarrisoneliF82

Link to the post?

The groups private so the link won't work, but here's a screenshot

[rborane]

Originally Posted by HyeM3

The groups private so the link won't work, but here's a screenshot

What did halim say?

[HyeM3]

Originally Posted by rborane

What did halim say?

OP said in an earlier comment that he replaced the VANOS after getting the codes but within 30 min of replacement the codes came back. Then Halim said to check the timing of the VANOS because it might not be timed properly. There's no replies to his comment though

[jpy1980]

Originally Posted by HyeM3

OP said in an earlier comment that he replaced the VANOS after getting the codes but within 30 min of replacement the codes came back. Then Halim said to check the timing of the VANOS because it might not be timed properly. There's no replies to his comment though

Any update on this?

[HyeM3]

Originally Posted by jpy1980

Any update on this?

No he hasn't posted any updates unfortunately, just left us all hanging haha

[JayKno]

Originally Posted by HyeM3

No he hasn't posted any updates unfortunately, just left us all hanging haha

I talked to him, it sounds like he had a bad install. Ran the maxpsi for over a year, then spun it after upping the power.

He said they retimed it 3 times but it keeps going back. They never determined exactly what happened. That doesn't add up to me since if they retimed it, wouldn't they need to check the crank hub during the retiming?

Anyways, he traded the car in .