[tractionoff]

Originally Posted by DrivenAgain

Yes. Most won't come here and talk bad news. Forums are for sharing good stuff so you won't see it much. Most don't know the perfect storm that makes them let go either. Custom tunes where u can tune out that initial hit and ramp in TQ are your best bet for the motor. JB4 is your best bet for if it goes boom, you're "covered"

I know this post is a year old, but I was on here still curious to find out if anyone had the same problem I did. I had a brand new 2021 F90 M5 LCI. Fully bone stock, not even an exhaust.. bought it brand new off the lot, and a year and a half later at around 30K miles, my motor blew.

[boost3dx]

Originally Posted by tractionoff

I know this post is a year old, but I was on here still curious to find out if anyone had the same problem I did. I had a brand new 2021 F90 M5 LCI. Fully bone stock, not even an exhaust.. bought it brand new off the lot, and a year and a half later at around 30K miles, my motor blew.

more details? what happened? what were you doing?

i had an E92 M3 blow a motor at 6K miles on the track.

[tractionoff]

Originally Posted by boost3dx

more details? what happened? what were you doing?

i had an E92 M3 blow a motor at 6K miles on the track.

I had oil, my oil changes were up to date. I wasn't even beating on the car that day. Shifted into 2nd gear at about 4k and it just blew.. I'm guessing I bottomed out at some point and it cracked my oil pan which caused it to blow? Like I said I'm really not sure, that's the only thing I can think of. There was 2 holes in the motor.

[AHall]

Originally Posted by tractionoff

I had oil, my oil changes were up to date. I wasn't even beating on the car that day. Shifted into 2nd gear at about 4k and it just blew.. I'm guessing I bottomed out at some point and it cracked my oil pan which caused it to blow? Like I said I'm really not sure, that's the only thing I can think of. There was 2 holes in the motor.

Very odd. 2021 that is a year and a half old, with 30K miles, driven in manual, shifted at moderate RPM and two holes in the motor. Could somehow be an assembly error. Maybe something not tightened properly that eventually came loose.

Do you have pictures? What did the dealership say? What happened to the car?

[pbonsalb]

91 octane or 93?

[SatinblkF90]

That’s freaking scary to read. Even I heard the LCI are supposed to have a few of the internals a little improved over pre lci and that still happened on an almost new low mileage car like that…

Assembly error, bad luck seems highly likely.

[SatinblkF90]

Originally Posted by ss_m5

I have 24k miles on a stage 2 BM3 tune. I've done many 1/4 mile runs in some of the hottest weather. Not a single problem. Car actually feels like it's getting faster. I'm proof you can run a stage 2 BM3 tune safely for a long time. You treat the car with respect it will treat you with respect. And no one is paying me to say this nor did I get anything for free. There's a lot of BS on these forums don't believe everything you read.

Why did you switch from a custom dme tune to bm3 OTS tune? Seems like you were running strong numbers on dme with low 6s 60-130 on e30, no way OTS is that quick.

[tractionoff]

Originally Posted by AHall

Very odd. 2021 that is a year and a half old, with 30K miles, driven in manual, shifted at moderate RPM and two holes in the motor. Could somehow be an assembly error. Maybe something not tightened properly that eventually came loose.

Do you have pictures? What did the dealership say? What happened to the car?

Unfortunately I don't have pics. They totaled the car out, and it went up on auction for surprisingly really high. Starting bid was $90K. I didn't want to deal with the headache, so I was fine w them totaling it out. Even with everything covered, by the time I would have gotten the car back, with the way things are today, I was better off totaling it out and getting something new. Picked up an F83 M4, really excited for the build.

[MNoob]

Originally Posted by tractionoff

Unfortunately I don't have pics. They totaled the car out, and it went up on auction for surprisingly really high. Starting bid was $90K. I didn't want to deal with the headache, so I was fine w them totaling it out. Even with everything covered, by the time I would have gotten the car back, with the way things are today, I was better off totaling it out and getting something new. Picked up an F83 M4, really excited for the build.

F8X rods are bullet proof. The piece that came through my block barely had a scratch

If you're thinking about a build, you'll also want to address the crank hub.

[tractionoff]

Originally Posted by MNoob

F8X rods are bullet proof. The piece that came through my block barely had a scratch

If you're thinking about a build, you'll also want to address the crank hub.

I was actually thinking of only going bootmod stage 1 for now. During the winter right before the spring hits I will go stage 2 n downpipe. Would you recommend doing the crankhub even only on stage 1? I hear a lot of mixed reviews on the crank..

[MNoob]

Originally Posted by tractionoff

I was actually thinking of only going bootmod stage 1 for now. During the winter right before the spring hits I will go stage 2 n downpipe. Would you recommend doing the crankhub even only on stage 1? I hear a lot of mixed reviews on the crank..

If I went back in time, I would have. I'd also be mindful of my heavy foot at low rpm. Those engines can create loads of torque at low rpm that's addictive.

[tractionoff]

Originally Posted by MNoob

If I went back in time, I would have. I'd also be mindful of my heavy foot at low rpm. Those engines can create loads of torque at low rpm that's addictive.

Oh yea it is definitely addicting.. have you had crank hub issues in the past?? Running a tune??

[MNoob]

Originally Posted by tractionoff

Oh yea it is definitely addicting.. have you had crank hub issues in the past?? Running a tune??

It was full bolt on with custom E85 tune. I made a paperweight out of a piece of the block. Your mileage may vary.

[tractionoff]

Originally Posted by MNoob

It was full bolt on with custom E85 tune. I made a paperweight out of a piece of the block. Your mileage may vary.

Oh yea you def needed to do that crank hub then. I'm only at 6K miles so I'm gonna rock with stage one for now, then before the spring I'll do the crank hub and go fbo stage 2 (bootmod3)

[SatinblkF90]

Originally Posted by tractionoff

Unfortunately I don't have pics. They totaled the car out, and it went up on auction for surprisingly really high. Starting bid was $90K. I didn't want to deal with the headache, so I was fine w them totaling it out. Even with everything covered, by the time I would have gotten the car back, with the way things are today, I was better off totaling it out and getting something new. Picked up an F83 M4, really excited for the build.

I just need to ask, what octane fuel were you running? Also, did the dealership have any explanation why the m5 engine blew? Like unlucky case, bad assembly etc. ?

[tractionoff]

Originally Posted by SatinblkF90

I just need to ask, what octane fuel were you running? Also, did the dealership have any explanation why the m5 engine blew? Like unlucky case, bad assembly etc. ?

93 always. And they couldn't tell.. all they said was they saw 2 holes in the motor.

[Duta569]

Originally Posted by tractionoff

Unfortunately I don't have pics. They totaled the car out, and it went up on auction for surprisingly really high. Starting bid was $90K. I didn't want to deal with the headache, so I was fine w them totaling it out. Even with everything covered, by the time I would have gotten the car back, with the way things are today, I was better off totaling it out and getting something new. Picked up an F83 M4, really excited for the build.

Who totaled it out? The insurance company?or bmw?. I thought for an insurance company to Total a car out the repair had to be more than the value of the vehicle?

I had a vehicle before that was valued at $27,000 and the insurance paid $16,000 for the repair after an accident.

I assume it was BMW, they must have felt that an engine replacement under warranty wasn't worth it for them?

[bimmerbeast9]

blown motors and bootmode go together like peas and carrots.

go to the bank and finance a clue

[pbonsalb]

Originally Posted by bimmerbeast9

blown motors and bootmode go together like peas and carrots.

go to the bank and finance a clue

Any tune with the wrong octane or that is run without the intended mods can ruin a motor. Tunes the user can modify or select further increase the risks. Most bootmod tune owners are doing just fine.

[SatinblkF90]

Especially bootmod3 OTS tunes which are really conservative. A lot of people are fine for long time even on custom tunes which are far more aggressive tunes than bm3 OTS files.

Plus anyways, wasn’t this car bone stock that blew up?! This just makes it even more odd.

[AHall]

Originally Posted by SatinblkF90

Especially bootmod3 OTS tunes which are really conservative. A lot of people are fine for long time even on custom tunes which are far more aggressive tunes than bm3 OTS files.

Plus anyways, wasn’t this car bone stock that blew up?! This just makes it even more odd.

Yeah this does not make much sense. The poster said it was a 2021 bone stock car. Something like this must have been covered by warranty. I wonder why they would not have just given him a new car. The cause must have been an assembly error or just a freak occurrence. I imagine these car have significant quality control in the assembly process so lots of questions but few answers. I mean second gear at relatively low rpm results in a failure of this magnitude?

[SatinblkF90]

Originally Posted by AHall

Yeah this does not make much sense. The poster said it was a 2021 bone stock car. Something like this must have been covered by warranty. I wonder why they would not have just given him a new car. The cause must have been an assembly error or just a freak occurrence. I imagine these car have significant quality control in the assembly process so lots of questions but few answers. I mean second gear at relatively low rpm results in a failure of this magnitude?

He said he may have bottomed out at some point possibly causing the oil pan to crack. Sounds like some big bump must of occurred while driving at some point at least, maybe that’s it, hard to say…