[BLVCKF30]

Sounds like the infamous spun rod bearing, I caught it today I haven’t drove it since. Can a simple rod bearing replacement save the engine or is the engine toast?

Video of sound here
https://youtu.be/FEkd_ew-eOU

Taking it to an indie euro mechanic but I’d love input from owners who’ve had this issue.
There are no check engine lights and the car actually runs great. For precaution I just haven’t turned it on since I heard that.

The car is currently out of warranty and I owe over $7000 on it still.

Since I’ve owned it at 43,000 miles I’ve changed oil at 4000 - 5000 miles and do all the maintenance myself. It’s my commuter, currently has 83k

What i think caused it:
I replaced my spark plugs for better performance for NKG one step colder plugs after running the car hard my car shut off and went to neutral.
Since then I replace the OEM spark plugs and car went back to running fine a week past now now I heard this noise on a cold morning.


Update **
Took it to BMW of Niello, after paying $210 for a diagnosis they found metal shavings In the oil, recommended getting a new engine, cost is $26,120. Worth more than a new car at this rate.

Reached out to BMWNA.

[F32Huncho]

Originally Posted by BLVCKF30

Sounds like the infamous spun rod bearing, I caught it today I haven’t drove it since. Can a simple rod bearing replacement save the engine or is the engine toast?

Video of sound here
https://youtu.be/FEkd_ew-eOU

Taking it to an indie euro mechanic but I’d love input from owners who’ve had this issue.
There are no check engine lights and the car actually runs great. For precaution I just haven’t turned it on since I heard that.

The car is currently out of warranty and I owe over $7000 on it still.

Since I’ve owned it at 43,000 miles I’ve changed oil at 4000 - 5000 miles and do all the maintenance myself. It’s my commuter, currently has 83k

What i think caused it:
I replaced my spark plugs for better performance for NKG one step colder plugs after running the car hard my car shut off and went to neutral.
Since then I replace the OEM spark plugs and car went back to running fine a week past now now I heard this noise on a cold morning.

I experienced the EXACT same thing, I posted it here ------>

https://f30.bimmerpost.com/forums/sh...8#post27036258

Long story short, the dealership was not able to determine what the cause is without tearing the engine down. They did however drain the oil and found metal specs in the oil, so they recommended I replace the engine.

I would start by checking the oil filter for metal shavings and go from there.

[Pussiwillow]

I wonder if you were in a situation that created a "super knock" situation and caused a spun bearing
Non the less I'm sorry to see this, :/

[BLVCKF30]

Originally Posted by F32Huncho

I experienced the EXACT same thing, I posted it here ------>

https://f30.bimmerpost.com/forums/sh...8#post27036258

Long story short, the dealership was not able to determine what the cause is without tearing the engine down. They did however drain the oil and found metal specs in the oil, so they recommended I replace the engine.

I would start by checking the oil filter for metal shavings and go from there.

Yep found some metal shavings in the oil filter. /:

[F32Huncho]

Originally Posted by BLVCKF30

Yep found some metal shavings in the oil filter. /:

Welp, there you have it. That is never a good thing. I would be interested to know whats causing the issue, I have read that the rod bearings were problematic in the early 13' model N55s.

[Polo08816]

Originally Posted by BLVCKF30

Sounds like the infamous spun rod bearing, I caught it today I haven’t drove it since. Can a simple rod bearing replacement save the engine or is the engine toast?

Video of sound here
https://youtu.be/FEkd_ew-eOU

Taking it to an indie euro mechanic but I’d love input from owners who’ve had this issue.
There are no check engine lights and the car actually runs great. For precaution I just haven’t turned it on since I heard that.

The car is currently out of warranty and I owe over $7000 on it still.

Since I’ve owned it at 43,000 miles I’ve changed oil at 4000 - 5000 miles and do all the maintenance myself. It’s my commuter, currently has 83k

What i think caused it:
I replaced my spark plugs for better performance for NKG one step colder plugs after running the car hard my car shut off and went to neutral.
Since then I replace the OEM spark plugs and car went back to running fine a week past now now I heard this noise on a cold morning.

Is your car stock? My powertrain is stock and I have 135,000 miles on it with a lot of that being track miles. No issues so far.

[Boostedphil698]

Originally Posted by BLVCKF30

Sounds like the infamous spun rod bearing, I caught it today I haven’t drove it since. Can a simple rod bearing replacement save the engine or is the engine toast?

Video of sound here
https://youtu.be/FEkd_ew-eOU

Taking it to an indie euro mechanic but I’d love input from owners who’ve had this issue.
There are no check engine lights and the car actually runs great. For precaution I just haven’t turned it on since I heard that.

The car is currently out of warranty and I owe over $7000 on it still.

Since I’ve owned it at 43,000 miles I’ve changed oil at 4000 - 5000 miles and do all the maintenance myself. It’s my commuter, currently has 83k

What i think caused it:
I replaced my spark plugs for better performance for NKG one step colder plugs after running the car hard my car shut off and went to neutral.
Since then I replace the OEM spark plugs and car went back to running fine a week past now now I heard this noise on a cold morning.

I'm also interested to know if your powertrain is stock and what year the car is.

[chinniciF32]

I bought my car at 41k and now I have 87k on it, so i'm curious how this plays out. My car isn't stock though and no problems so far besides from the classic ofhg, vcg, and probably coming soon waterpump+thermostat.

[Polo08816]

Originally Posted by chinniciF32

I bought my car at 41k and now I have 87k on it, so i'm curious how this plays out. My car isn't stock though and no problems so far besides from the classic ofhg, vcg, and probably coming soon waterpump+thermostat.

That's my next preventative maintenance DIY. Although the M Sport cars may have 2 water pumps - one primary and one auxiliary. I'm waiting to install the ER TIC to get a better view of some of the cooling system plumbing.

[BLVCKF30]

2013 335 stock tune, vrsf charge pipe, vrsf intercooler And afe momentum cai.
Everything else is stock.

Originally Posted by Polo08816

Is your car stock? My powertrain is stock and I have 135,000 miles on it with a lot of that being track miles. No issues so far.

[Polo08816]

Originally Posted by BLVCKF30

2013 335 stock tune, vrsf charge pipe, vrsf intercooler And afe momentum cai.
Everything else is stock.

Did you purchase it used? Is it possible the previous owner did not have a stock powertrain?

[chinniciF32]

thats a good point, if the car was second hand maybe the first owner did a dme flash (MHD, BM3 or custom) or a TCU flash (XHP). If it is maybe you could scan the car through the obdII and look for shadow codes. I'm just surprised and worried to see this happen on a more or less stock car.

[thejeremyman9]

Originally Posted by Polo08816

Did you purchase it used? Is it possible the previous owner did not have a stock powertrain?

I am wondering the same thing, especially if it came with the hardware installed.