[ghost_m2c]

I think that this issue usually gets blown out of proportion because it only affects a small precentage of cars. Should I not worry about the crankhub issue or should I buy a keyed/solid crankhub to replace it? (Plan on a jb4 tune and maybe a few bolt-ons)

[DanG]

With stock power the crank hub is no problem. With a tune you increase the probability of a failure. Also remember that a tune voids your engine warranty.

[swampfox94]

It's not a huge issue with the m3/4 with 10% more power and same parts so I'm not too stressed

[chris719]

I'd make sure I am covered in terms of cash for repair or replacement if I am tuning an S55 and voiding my warranty. The cheapest mitigation that might have an effect, like the bolt capture, is all I would even consider unless you are going for big power. I'd also much rather have a flash tune than a JB4.

[n8dgr84]

I've settled on a VTT crank bolt capture with Stg 1 tune.
Send it/yolo.
Just don't moneyshift a manual trans...

[flybigjet]

VTT crank bolt capture w/ Carbahn's Stage 1 flash tune.

Ponied up for their matching warranty. I had a software issue (glitchy flash). Steve Dinan himself called me to get it sorted and he sent me to my local dealer for troubleshooting/removal of the DME, shipment of the DME to CA, re-flash & shipment of the DME back to the dealer in CO and reinstallation of the DME-- all on Carbahn's dime. It literally didn't cost me a penny.

At the end of the BMW warranty, I'll have the crank hub fix installed as I intend to keep the car for pretty much the rest of my life.

Ymmv.

R.

[Poochie]

If you have GEICO as your insurance carrier, may I suggest you add their Mechanical Breakdown rider coverage..

They'll pay for your crank hub repair, even if you're fully tuned..

I've used them the first time last summer and had very positive repair experience, despite leaving a Dinantronics Stage 4 plugged into my ECU, just to test the theory..

https://www.bimmerpost.com/forums/sh...php?p=23193072

.

[swampfox94]

Originally Posted by Poochie

If you have GEICO as your insurance carrier, may I suggest you add their Mechanical Breakdown rider coverage..

They'll pay for your crank hub repair, even if you're fully tuned..

I've used them the first time last summer and had very positive repair experience, despite leaving a Dinantronics Stage 4 plugged into my ECU, just to test the theory..

https://www.bimmerpost.com/forums/sh...php?p=23193072

.

I've seen they allow you to have to for up to 100k and 7 years but will they increase price as your car gets older?

[VisualEcho]

Originally Posted by DanG

With stock power the crank hub is no problem.

You should know better than this. The failure is a possibility even with stock power, although less of a probability than with increased power.

[DanG]

Originally Posted by VisualEcho

You should know better than this. The failure is a possibility even with stock power, although less of a probability than with increased power.

Possible yes but very unlikely.

[VisualEcho]

Originally Posted by DanG

Possible yes but very unlikely.

Only BMW knows how common it is on unmodified cars, but I suspect it's more common than we think. Few owners join message boards.

[robertm]

Only you can decide what makes sense for you. Even if the worst doesn't happen, do you really want to be thinking and worrying about it every time you drive the car in a manner which benefits from the addition of the tune?

[aerokubectl]

blown out of proportion. Do you know how many S55s they sell across the world? I asked my dealer and they’ve never had a single customer come in with a failure but have read about this on the internet...

With those odds, you make a decision

[Poochie]

Originally Posted by swampfox94

I've seen they allow you to have to for up to 100k and 7 years but will they increase price as your car gets older?

Not really, it might fluctuate a few dollars here and there, over the years but nothing drastic.

Like I was paying $25 when I had now gotten the car and now, after roughly four years, it's still like only $45, for every six months..

Which is a bargain for what you get, when compare it against the cost of BMW Platinum extended warranty coverage, which typically ranges over $3,000+, for comparable coverage and more importantly, a lot more red tape in what is covered..

[spuntyb]

Make sure you have some money set aside if you tune. Ask me how I know:
New engine/Gintani hub after spun crank hub https://f80.bimmerpost.com/forums/sh....php?t=1752927

Also, don't listen to anyone who says you should only be concerned with a higher stage tune. 500whp. Stage 2. Whatever. You can spin a stock hub. You can spin a stage 1. You can spin stage 2, and so on. Plenty of people have turned their Ms into FBO race cars with the stock hub and never had a problem otoh. It's your car, so do what makes the most sense for you.

If you don't plan to tune, I wouldn't touch the crank hub. Not enough of an issue. If it happens under warranty, BMW will replace it and repair or replace the engine if it's damaged in the process.

[spuntyb]

Originally Posted by VisualEcho

Only BMW knows how common it is on unmodified cars, but I suspect it's more common than we think. Few owners join message boards.

This

[chris719]

Originally Posted by spetsnazos

blown out of proportion. Do you know how many S55s they sell across the world? I asked my dealer and they’ve never had a single customer come in with a failure but have read about this on the internet...

With those odds, you make a decision

The plural of anecdote is not data, though. I heavily researched S65 and S85 failures when I was looking at buying an E92 M3. Magically, every SA asked denies they've seen them when users would post about what their dealer said, but it was fairly widespread and drew a class action suit.

You may well be right, but just because a dealer says something doesn't mean it's true or representative.

[aerokubectl]

Originally Posted by chris719

The plural of anecdote is not data, though. I heavily researched S65 and S85 failures when I was looking at buying an E92 M3. Magically, every SA asked denies they've seen them when users would post about what their dealer said, but it was fairly widespread and drew a class action suit.

You may well be right, but just because a dealer says something doesn't mean it's true or representative.

yeah no 100% but just like the data i present from dealers is mostly anecdotal bs, so are forums.

[Bl4ckD0g]

Yup I take the stuff from the internet with a large pinch of salt. Apparently my daily drivers V8-SC timing chain guides will all come off, or on my previous the turbo's blown, or the pickup truck I had all had the bottom end go boom, and then there was the Porsche with the bore lining coming off, and the same to my v8 BMW...Damn I feel left out, or extremely unlucky that I never had these things. Issues get blown out of proportion so quickly.

[T1313]

996 IMS Bearing, E46 M3 rod bearings, S65 rod bearings, timing chain guides on the V8s, the S55 crank hub and a zillion others that the Internet has brought to everyone's mind...
All real things indeed... Winning the lottery is too and dudes DO get to marry supermodels I suppose!
It's a tough call on what to do but one thing that seems consistent is that lots of shops that sell these fixes are certain that you should pay them perform the fixes and the guys that already spent the money are true believers (for good or ill) and in this group where people spend $5k on a pipe and a muffler and $3500 on plastic wrap, it's an easy sell!

[COChris]

Originally Posted by T1313

996 IMS Bearing, E46 M3 rod bearings, S65 rod bearings, timing chain guides on the V8s, the S55 crank hub and a zillion others that the Internet has brought to everyone's mind...
All real things indeed... Winning the lottery is too and dudes DO get to marry supermodels I suppose!
It's a tough call on what to do but one thing that seems consistent is that lots of shops that sell these fixes are certain that you should pay them perform the fixes and the guys that already spent the money are true believers (for good or ill) and in this group where people spend $5k on a pipe and a muffler and $3500 on plastic wrap, it's an easy sell!

Also never own an F355 because maintenance. In a more serious tone, I'll remind us all that the S55 in the M2 is detuned.

[hellrotm]

Do people tune their engine...just because? Do they honestly feel it isn't fast enough driving around town? Even on track the M2C never felt like it lacked power, was plenty quick enough. Enjoy the car stock and with warranty.