Bad S55 week: spun hub, intercooler leak

[scoale]

Decided to trade my '16 DCT w/ 53k on the clock for an '18 manual and, when doing a routine coolant check notice intercooler reservoir is very low. Take it in and sure enough needs to be replaced. Fortunately, extended warranty covered and trade-in to BMW dealership proceeded as planned. Car was stock

Two days later my new to me '18 manual I bought from same BMW dealership gives me the dreaded "drivetrain malfunction ok to drive w/ reduced power". I stopped car and turned off engine. It cranked several times when restarting and I got same message and finished 5 minute drive home. Dropping it at dealer Monday and thankfully still have a year of warranty left.

Hoping its not spun crankhub but the way it restarted has me worried. Don't have a code reader to see if I'm getting camshaft codes, etc.. Stock power 12/1 UPDATE: confirmed spun hub

Keeping fingers crossed its something minor

[bsmf8x]

18 cars have had the crank hub issue more than the 15-17 lol. Especially low mileage ones, you got warranty though so you'll be fine.

[spuntyb]

If you have a warranty I wouldn't sweat it. Of course you'll be getting another stock hub with the same issues, but you should be fine

[exmowner]

Originally Posted by bsmf8x

18 cars have had the crank hub issue more than the 15-17 lol. Especially low mileage ones, you got warranty though so you'll be fine.

Is there some data I’m unaware of that proves “18 cars had the crank hub issue more then 15-17?” ?

There have been no hardware or part changes in the crank hub design for any model year.

[Fat Goose]

Originally Posted by exmowner

Is there some data I’m unaware of that proves “18 cars had the crank hub issue more then 15-17?” ?

There have been no hardware or part changes in the crank hub design for any model year.

This

[BlackF82]

No data at all, its you and your luck.

The only logical explanation is if you tune your car, your chance is higher of spinning. All other comments made are just people speculating or giving there opinions based on reading a few posts online.

With warranty, be worry free my man.

[six75LT]

probably just bad spark plugs. my brother picked up a cpo m3 last week and as we were leaving the dealership the CEL turns on and so does the drivetrain malfunction. they swapped them out and the 700 mile trip back home was smooth as butter. not sure why these cars have so many issues with the plugs/coils. have had to service my 2020 3 times for plugs/coils this year, the first time being a week after i got the car... with like 300 miles on it.

[CanAutM3]

The intercoolant leaking into the cylinders could have fouled your sparkplugs. The better practice after suffering an intercooler leak is to replace the engine oil and the sparkplugs.

[1stockf80]

Originally Posted by scoale

Decided to trade my '16 DCT w/ 53k on the clock for an '18 manual and, when doing a routine coolant check notice intercooler reservoir is very low. Take it in and sure enough needs to be replaced. Fortunately, extended warranty covered and trade-in to BMW dealership proceeded as planned. Car was stock

Two days later my new to me '18 manual I bought from same BMW dealership gives me the dreaded "drivetrain malfunction ok to drive w/ reduced power". I stopped car and turned off engine. It cranked several times when restarting and I got same message and finished 5 minute drive home. Dropping it at dealer Monday and thankfully still have a year of warranty left.

Hoping its not spun crankhub but the way it restarted has me worried. Don't have a code reader to see if I'm getting camshaft codes, etc.. Stock power

Keeping fingers crossed its something minor

This is why I’m terrified to buy a used f80. A lot of cars have been tuned and heavily modded. I know dealers are supposed to flag these cars and not cpo them but a lot of them are slipping through the cracks for a lot of reasons. I have personally seen this happen a handful of times. Good luck and I hope it’s just a misfire or something small

[scoale]

Originally Posted by six75LT

probably just bad spark plugs. my brother picked up a cpo m3 last week and as we were leaving the dealership the CEL turns on and so does the drivetrain malfunction. they swapped them out and the 700 mile trip back home was smooth as butter. not sure why these cars have so many issues with the plugs/coils. have had to service my 2020 3 times for plugs/coils this year, the first time being a week after i got the car... with like 300 miles on it.

Sorry, should have mentioned that car has 23k miles and spark plugs were changed at 22k.

[scoale]

Originally Posted by CanAutM3

The intercoolant leaking into the cylinders could have fouled your sparkplugs. The better practice after suffering an intercooler leak is to replace the engine oil and the sparkplugs.

Intercoolant leak was on old car. I checked new car as soon as I got home and it had cooled down and level was fine.

[scoale]

Originally Posted by 1stockf80

This is why I’m terrified to buy a used f80. A lot of cars have been tuned and heavily modded. I know dealers are supposed to flag these cars and not cpo them but a lot of them are slipping through the cracks for a lot of reasons. I have personally seen this happen a handful of times. Good luck and I hope it’s just a misfire or something small

I hear you but it is just luck of the draw. My '16 F80 never had a problem other than intercooler leak which I knew could crop up at some point. If I were going to own an S55 out of warranty I would simply upgrade intercooler and crank hub and not give it another thought. Rest of car is pretty solid in my experience. In fact, I bought my new M2c knowing all about potential intercooler and crankhub issues. If i keep either/both of my S55 out of warranty I will follow my own guidance . All of these cars have one or two things and, if you're educated, you can address them upfront.

Still hoping its not hub....

[CanAutM3]

Originally Posted by scoale

Intercoolant leak was on old car. I checked new car as soon as I got home and it had cooled down and level was fine.

Sorry, misread that.

[///M4ster Yoda]

Originally Posted by six75LT

probably just bad spark plugs. my brother picked up a cpo m3 last week and as we were leaving the dealership the CEL turns on and so does the drivetrain malfunction. they swapped them out and the 700 mile trip back home was smooth as butter. not sure why these cars have so many issues with the plugs/coils. have had to service my 2020 3 times for plugs/coils this year, the first time being a week after i got the car... with like 300 miles on it.

Really? I'm currently driving a 2020 F82 14,000 miles with zero issues

[six75LT]

Originally Posted by scoale

Sorry, should have mentioned that car has 23k miles and spark plugs were changed at 22k.

i believe they swapped his out like a week or two before he picked it up

Originally Posted by ///M4ster Yoda

Really? I'm currently driving a 2020 F82 14,000 miles with zero issues

yup, i think im just cursed

[bsmf8x]

Originally Posted by BlackF82

No data at all, its you and your luck.

The only logical explanation is if you tune your car, your chance is higher of spinning. All other comments made are just people speculating or giving there opinions based on reading a few posts online.

With warranty, be worry free my man.

Originally Posted by Fat Goose

This

Originally Posted by exmowner

Is there some data I'm unaware of that proves "18 cars had the crank hub issue more then 15-17?" ?

There have been no hardware or part changes in the crank hub design for any model year.

It's all anecdotal as I know 10+ F8x owners and it just happens that the 2018 M3's had worse luck, and the shop owner who does most of the crank hub fixes in NY told me numerous times that he sees 2018's with very low miles spinning hubs very often, more than any other model year. Also, there's a couple threads of people with under 10k miles on their 2018's spinning them.

But you're right there's no data and it's all speculation, I should've mentioned that. Doesn't really mean much, might just be that people started going to him in the year 2018 lol as before if you were tuned on a brand new 2015-2016 m3/4 your chances with the dealership were much higher 3-5 years ago. (getting anything fixed under warranty if you're tuned).

Really is luck, but stock cars are definitely better off than the guy running ethanol.

[zamboni]

I only had 13K miles on mine should I be worry on the hub?

[scoale]

Going stir crazy waiting for Monday so decided to pop the hood and take a look at the oil filter. No metal or shavings. Double-checked coolant and looks good.

[///M4ster Yoda]

Originally Posted by six75LT

i believe they swapped his out like a week or two before he picked it up

yup, i think im just cursed

Damn. That sucks man. Bad luck.

[f80er]

Originally Posted by 1stockf80

This is why I’m terrified to buy a used f80. A lot of cars have been tuned and heavily modded. I know dealers are supposed to flag these cars and not cpo them but a lot of them are slipping through the cracks for a lot of reasons. I have personally seen this happen a handful of times. Good luck and I hope it’s just a misfire or something small

Come on man. This forum is a tiny subset of F80 owners so your fear is mostly unfounded.

[N1rve]

Originally Posted by zamboni

I only had 13K miles on mine should I be worry on the hub?

No.

[Gunzy]

Extended crank time somewhat points to the hub. If your under warranty have them put in a pinned version and you'll be stress free for the rest of ownership.