[jackstrath]

Originally Posted by PURE340i

Sorry I'm not BMWNA to pull up this "documentation" you're after. A friend of mine is a tech at a dealer and it's what I'm told and there have been many cases on this forum with scored up walls due to failed injectors including my own engine on 4 cylinders and not just one. The first one noted occurred in 2016 and it was not flashed..... JB4 only + meth and luckily the dealer covered it. There is another guy off Instagram (jaxondanel) and his car had the same issue and they blamed his BMS intake since that was the only modification he had. I'm not going to dig deep into which users and people have suffered with this issue.... I'm living proof with 4 scored up walls with 4 failed injectors.

Ignore the pests, care to add the dealers findings/results, your car spec age tune if any bolt ons ect ect ? Also if you got it fixed ect

Would be helpful

[///Madgreek1]

Originally Posted by PURE340i

Sorry I'm not BMWNA to pull up this "documentation" you're after. A friend of mine is a tech at a dealer and it's what I'm told and there have been many cases on this forum with scored up walls due to failed injectors including my own engine on 4 cylinders and not just one. The first one noted occurred in 2016 and it was not flashed..... JB4 only + meth and luckily the dealer covered it. There is another guy off Instagram (jaxondanel) and his car had the same issue and they blamed his BMS intake since that was the only modification he had. I'm not going to dig deep into which users and people have suffered with this issue.... I'm living proof with 4 scored up walls with 4 failed injectors.

So did the dealer end up replacing your engine? Mileage when the failure occured?
I'm surprised to hear a dealer replaced an engine with meth injection, I would think that would similarly "void" the warranty and give them an excuse not to pay.

[Rockyca]

Might be helpful for some...

Check out this teardown of the b58tu.

Around 9:40 you can see the internal bores of a virtually new engine and there appears to be some very slight “scoring” lines. I think this issue may be overblown. I also think some of the bright lights on the borescopes may be highlighting some natural wear marks making them appear much worse than they actually are.

If compression, leak down, and oil consumption levels are all within check I don’t think there is much to worry about. Typically proper scored cylinders like those in a lot of 90s-2000s Porsche’s exhibit excessive oil consumption and I haven’t really heard of any oil consumption issues on this board. It is possible that all of our b58 engines look exactly the same but they haven’t been scoped because they run great and there is no need.

Think of how many bmw’s have this engine. If it was a widespread issue, you think we would have heard about it by now?

[PURE340i]

Originally Posted by Rockyca

Might be helpful for some...

Check out this teardown of the b58tu.

Around 9:40 you can see the internal bores of a virtually new engine and there appears to be some very slight “scoring” lines. I think this issue may be overblown. I also think some of the bright lights on the borescopes may be highlighting some natural wear marks making them appear much worse than they actually are.

If compression, leak down, and oil consumption levels are all within check I don’t think there is much to worry about. Typically proper scored cylinders like those in a lot of 90s-2000s Porsche’s exhibit excessive oil consumption and I haven’t really heard of any oil consumption issues on this board. It is possible that all of our b58 engines look exactly the same but they haven’t been scoped because they run great and there is no need.

Think of how many bmw’s have this engine. If it was a widespread issue, you think we would have heard about it by now?

When you have scored up walls and remove your oil filter you will see pieces of metal in there and the oil is glazed with metal. That is one good indication. You're right it does not happen to everyone, but there has been several cases on this forum.

[Wires]

There are tons of "scoring threads" on this forum, mentioned on tuned and stock engines. Am I going to dig it up, nope, but feel free to use the search button.

The reality is it is highly likely that all of our engines have scoring issues, but nobody scopes the cylinder unless there is a failure.

[Wires]

Originally Posted by ///Madgreek1

So did the dealer end up replacing your engine? Mileage when the failure occured?
I'm surprised to hear a dealer replaced an engine with meth injection, I would think that would similarly "void" the warranty and give them an excuse not to pay.

It is highly dependent on the dealer. Some are mod friendly, some are not. Yours was not, and your VIN got flagged.

[BMWILUVU]

Originally Posted by ///Madgreek1

Good evening,

I am writing to try to get info, and outcomes from anyone who.may have experienced the same issue I am having. Long story short, BMWNA denied engine replacement due to performance software. I am looking for any documented cases I can provide as evidence, especially if it resulted in engine replacement by BMW.

2016 340i rwd at 42k
Dinan intake, VRSF downpipe, remus exhaust, bm3 stage 2

Cylinder misfire, scoring on cylinder walls (#6)

Thanks for any help!

Is this a certified pre-owned? Why can't you say the previous owner caused this? In my opinion, cylinder scoring is bad air intake or an oil problem. No scoring problems on my tracked car.

[///Madgreek1]

Originally Posted by BMWILUVU

Is this a certified pre-owned? Why can't you say the previous owner caused this? In my opinion, cylinder scoring is bad air intake or an oil problem. No scoring problems on my tracked car.

Certified pre-owned but not by BMW dealership (Honda dealer, so not REALLY certified lol)

I believe they can see when the DME was flashed (not sure though), negating any arguement that it was the previous owner.

[440MIA]

Take a look at the screenshots I attached. I'm not sure if these changes in the B58TU have anything to do with this.

[JD11937]

Wonder if that crappy 0-20 oil has anything to do with it.

[Rockyca]

Or if using something thicker than 0w20 has something to do with it??

[vinzcast21]

check my previous post

[G.Newt]

Originally Posted by Rockyca

Might be helpful for some...

Check out this teardown of the b58tu.

Around 9:40 you can see the internal bores of a virtually new engine and there appears to be some very slight “scoring” lines. I think this issue may be overblown. I also think some of the bright lights on the borescopes may be highlighting some natural wear marks making them appear much worse than they actually are.

If compression, leak down, and oil consumption levels are all within check I don’t think there is much to worry about. Typically proper scored cylinders like those in a lot of 90s-2000s Porsche’s exhibit excessive oil consumption and I haven’t really heard of any oil consumption issues on this board. It is possible that all of our b58 engines look exactly the same but they haven’t been scoped because they run great and there is no need.

Think of how many bmw’s have this engine. If it was a widespread issue, you think we would have heard about it by now?

This. No loss of compression, no oil loss, no leaks discovered from leakdown test, no replace motor.
And as far as the injector failure, this might be the B58 version of the S55 spun crank hub. Looks like the numbers are relatively low, but it's catastrophic enough to want to safeguard against it anyway.

[JD11937]

Originally Posted by G.Newt

This. No loss of compression, no oil loss, no leaks discovered from leakdown test, no replace motor.
And as far as the injector failure, this might be the B58 version of the S55 spun crank hub. Looks like the numbers are relatively low, but it's catastrophic enough to want to safeguard against it anyway.

How do we safeguard against it though? I don't know of any upgrades available yet.

[///Madgreek1]

Dont know if this points to anything or is significant, but when I was searching for replacement injectors on dealer websites the page shows:

P/n: 13-53-8-625-396

Replaces p/n: 13-53-7-639-990

Does this mean the early b58 injectors needed a revision and it was just never stated publically? Why else would there be a replacement p/n?

[///Madgreek1]

[Rockyca]

cost is pretty high for P/M. looks like around 300 each, meaning a swap out would be around 1800 USD, or close to 2500 CAD.

[jackstrath]

Interestingly mine has 13538625396 fitted, did yours have 13-53-7-639-990?

That alone would be good to document, also id like to know what kinda fuel you had been running, and if always serviced ect and if any injector treatments used?

[G.Newt]

Originally Posted by ///Madgreek1

Dont know if this points to anything or is significant, but when I was searching for replacement injectors on dealer websites the page shows:

P/n: 13-53-8-625-396

Replaces p/n: 13-53-7-639-990

Does this mean the early b58 injectors needed a revision and it was just never stated publically? Why else would there be a replacement p/n?

Always cross-reference against realoem: https://www.realoem.com/bmw/enUS/sho...diagId=13_1754

There's only 1 injector listed: the xxx396 ones. What did change was the high-pressure rail. Hmmmmm.

[Rockyca]

Originally Posted by vinzcast21

check my previous post

What oil were you running when your car had its issues?

[Nugget]

Originally Posted by ///Madgreek1

Dont know if this points to anything or is significant, but when I was searching for replacement injectors on dealer websites the page shows:

P/n: 13-53-8-625-396

Replaces p/n: 13-53-7-639-990

Does this mean the early b58 injectors needed a revision and it was just never stated publically? Why else would there be a replacement p/n?

That is interesting, I wonder when they swapped.
My car is Feb 2017 production and has 13-53-8-625-396

[Rockyca]

might be a totally different chassis also... my 04/16 production has the pn 13-53-8-625-396 listed in realoem with no previous revision.


edit:

https://www.realoem.com/bmw/enUS/par...90&series=F30N