[StannisBaratheon]

Originally Posted by ///Madgreek1

2016 340i 41k mi

Dinan intake, vrsf downpipe, remus catback exhaust, bm3 stage 2

Car went into limp mode on sunday, multi cylinder misfire. Flashed back to stock and took to dealership. After diagnosis, bmw states scoring on cylinder 6 walls. Engine replacement required. BMW denies warranty due to dme tampering.

Obviously I'm not about to fork over the $32k they quoted for engine replacement. What are my other options? Sleeves and forged pistons? Can I turn this into an opportunity to upgrade some stuff? I'm already waiting on a vtt gc turbo upgrade and have a supra pump ready to install. Thoughts?

That’s terrible, sorry to hear about that. Did they send you any pictures of the scoring? There have been a few cases of cylinder wall scoring but no solid answers on what caused it... Some speculate that it’s injector failure which washes down the cylinder walls. My guess is that the extra boost/fuel got the piston (and maybe wrist pin) too hot and the thermal expansion caused the small end of the rod to bind up making the skirts hit the wall. Good luck and let us know what you end up doing.

[G.Newt]

Originally Posted by ///Madgreek1

2016 340i 41k mi

Dinan intake, vrsf downpipe, remus catback exhaust, bm3 stage 2

Car went into limp mode on sunday, multi cylinder misfire. Flashed back to stock and took to dealership. After diagnosis, bmw states scoring on cylinder 6 walls. Engine replacement required. BMW denies warranty due to dme tampering.

Obviously I'm not about to fork over the $32k they quoted for engine replacement. What are my other options? Sleeves and forged pistons? Can I turn this into an opportunity to upgrade some stuff? I'm already waiting on a vtt gc turbo upgrade and have a supra pump ready to install. Thoughts?

You can buy used motors for ~$4,800 or so online, which is not a bad price. Even with labor and new fluids, that's considerably cheaper than $32k from BMW lol.

[///Madgreek1]

Originally Posted by G.Newt

You can buy used motors for ~$4,800 or so online, which is not a bad price. Even with labor and new fluids, that's considerably cheaper than $32k from BMW lol.

Ya, I'm trying to find the lowest mileage replacement I can. Curious.if the euro b58b30a fits my car the same as us spec. Theres some decent looking 5-7km engines in Germany and the uk. Any coding required on a motor swap? I would think my dme wouldn't notice that it was a change mechanically, just new sensors being read...

[les anderson]

Originally Posted by ///Madgreek1

38k

Absolutely brutal. Best of luck

Any other symptoms before codes got thrown in hindsight? We're you bone stock before 38k?

[///Madgreek1]

Originally Posted by les anderson

Absolutely brutal. Best of luck

Any other symptoms before codes got thrown in hindsight? We're you bone stock before 38k?

Bought the car w/ 37k in October and quickly got the bug...started w/ intake and downpipe, then bm3, then exhaust, carbon everywhere... you know how it goes lol. The car ran like new all the way up until she didnt. The only code I ever pulled was a mass airflow code when I hadn't attached the intake boot completely and was sucking in un-metered air. A quick fix and a clear of the codes and no other issues along the way. I had been counting the days until my VTT GC turbo arrives so I could get that installed and get a custom Cary Jordan tune. I PLANNED on my trip to the dealership being to get a M Performance Diff, not to get told my warranty was void and I need a new motor... such is life though I suppose

[vinzcast21]

Originally Posted by StannisBaratheon

Took my 2016 340i with 50k miles in for low coolant and a rattling noise on cold start that goes away when the engine is warmed up. Rattle turned out to be the waste gate but not severe enough to warrant turbo replacement. BMW states the noise is normal... I’m not happy with that answer, has anyone else experienced this with the B58? I know this was a common problem on the N54.

can you post the sound please? i also have rattles but I suspect its just the exhaust flap

[StannisBaratheon]

Originally Posted by vinzcast21

can you post the sound please? i also have rattles but I suspect its just the exhaust flap

It’s a metallic tapping/rattling on cold start. It happens after the car has sat over night but the sound is hard to pick up in a video. They were saying the waste gate isn’t sealing completely when it’s cold. It sounds like other people have had this issue and the dealer says that it’s normal... The sound usually goes away when it’s warmed up but not always.

[les anderson]

Originally Posted by ///Madgreek1

Bought the car w/ 37k in October and quickly got the bug...started w/ intake and downpipe, then bm3, then exhaust, carbon everywhere... you know how it goes lol. The car ran like new all the way up until she didnt. The only code I ever pulled was a mass airflow code when I hadn't attached the intake boot completely and was sucking in un-metered air. A quick fix and a clear of the codes and no other issues along the way. I had been counting the days until my VTT GC turbo arrives so I could get that installed and get a custom Cary Jordan tune. I PLANNED on my trip to the dealership being to get a M Performance Diff, not to get told my warranty was void and I need a new motor... such is life though I suppose

Thanks. If you are up for it I have a few more questions! As been stated, this is somewhat a rare occurrence and there is not a ton of data so some information would be helpful.

• Have you asked BMW for pictures of the cylinder walls?
• Have you asked them what actually caused the failure?
• Where you driving particularly hard when this happened?
• Have you spoken to PTF? What have they said?
• Had you recently run any logs?
• When it was clear the issue was significant, was BMWNA already involved?
• Have you considered appealing BMWNA's decision and asking for some sort of goodwill? Running a widely used tune for a few thousand miles seems convenient for them, and they are required by law to prove that the tune caused the failure from what I understand. Low odds, not much leverage but maybe worth a try???
• Are you in a cold climate?
• Do you know where the car lived prior to your purchase?

Again- best of luck to you and any info is appreciated!

[kilogram]

Originally Posted by les anderson

Thanks. If you are up for it I have a few more questions! As been stated, this is somewhat a rare occurrence and there is not a ton of data so some information would be helpful.

• Have you asked BMW for pictures of the cylinder walls?
• Have you asked them what actually caused the failure?
• Where you driving particularly hard when this happened?
• Have you spoken to PTF? What have they said?
• Had you recently run any logs?
• When it was clear the issue was significant, was BMWNA already involved?
• Have you considered appealing BMWNA's decision and asking for some sort of goodwill? Running a widely used tune for a few thousand miles seems convenient for them, and they are required by law to prove that the tune caused the failure from what I understand. Low odds, not much leverage but maybe worth a try???
• Are you in a cold climate?
• Do you know where the car lived prior to your purchase?

Again- best of luck to you and any info is appreciated!

It's worth noting to BMW that scored cylinder walls have been documented to happen on stock engines, usually coupled with a failed injector, which would indicate that the root cause is in their hardware, not in the software that was changed that is resulting in denial of warranty.

[vinzcast21]

Originally Posted by StannisBaratheon

It’s a metallic tapping/rattling on cold start. It happens after the car has sat over night but the sound is hard to pick up in a video. They were saying the waste gate isn’t sealing completely when it’s cold. It sounds like other people have had this issue and the dealer says that it’s normal... The sound usually goes away when it’s warmed up but kit always.

did you isolate the noise to where the wastegate is? it seems normal to me too

[StannisBaratheon]

Originally Posted by vinzcast21

did you isolate the noise to where the wastegate is? it seems normal to me too

Tech findings:

"Minor play in wastegate arm, suspect wastegate seat is not fully seating.... took video of noise with second tech and submitted to tsara for turbo replacement... Instructed to remove wastegate linkage to check for binding and play in wastegate arm. Found no binding when moving wastegate arm from one end stop to the other. Felt some play in wastegate arm. Submitted video to tsara case of play in wastegate arm. Instructed there is not enough play in wastegate arm to replace turbo. Instructed to check wastegate flap to see if its sitting flush. Removed spark plug and inspected wastegate flap with bore scope. Wastegate flap is sitting flush. Instructed per tsara noise is normal operating noise and not enough evidence for turbo wastegate failure."

I'm going to keep an eye on it, I'm not convinced this sound is normal. The turbo on my old passat had wastegate rattle and was replaced... I just saw your thread on the cylinder wall scoring in your B58 - How's that going? Any updates?

[///Madgreek1]

Originally Posted by les anderson

Thanks. If you are up for it I have a few more questions! As been stated, this is somewhat a rare occurrence and there is not a ton of data so some information would be helpful.

• Have you asked BMW for pictures of the cylinder walls?
• Have you asked them what actually caused the failure?
• Where you driving particularly hard when this happened?
• Have you spoken to PTF? What have they said?
• Had you recently run any logs?
• When it was clear the issue was significant, was BMWNA already involved?
• Have you considered appealing BMWNA's decision and asking for some sort of goodwill? Running a widely used tune for a few thousand miles seems convenient for them, and they are required by law to prove that the tune caused the failure from what I understand. Low odds, not much leverage but maybe worth a try???
• Are you in a cold climate?
• Do you know where the car lived prior to your purchase?

Again- best of luck to you and any info is appreciated!

I have asked bmw for the detailed report/ photos/ email chain w/bmwna etc. My sa is going to get me as much as she can later today.

I have not yet contacted BMWna or ptf directly.

I was driving normally when the failure occurred, about 45mph uphill.

I do not have any recent logs.

I know there are other documented cases of cylinder scoring during to injector/ plug failure. Hoping to appeal to BMWna based on the fact it was no probable result of the software.

The car has lived its life in Wa.

[PURE340i]

Originally Posted by ///Madgreek1

2016 340i 41k mi

Dinan intake, vrsf downpipe, remus catback exhaust, bm3 stage 2

Car went into limp mode on sunday, multi cylinder misfire. Flashed back to stock and took to dealership. After diagnosis, bmw states scoring on cylinder 6 walls. Engine replacement required. BMW denies warranty due to dme tampering.

Obviously I'm not about to fork over the $32k they quoted for engine replacement. What are my other options? Sleeves and forged pistons? Can I turn this into an opportunity to upgrade some stuff? I'm already waiting on a vtt gc turbo upgrade and have a supra pump ready to install. Thoughts?

I'm 100% sure the injector failed and scored up the wall. This is becoming a common issue on the B58 and they're just using the flash as a key to get out of the ticket to replace the engine. Try hiring a lemon Attorney so they can prove if the "tune" ruined the walls or not. Tune's don't just ruin injectors lol this has been a issue with BMW since the N54 days... non stop failing injectors.

[jackstrath]

Originally Posted by StannisBaratheon

It’s a metallic tapping/rattling on cold start. It happens after the car has sat over night but the sound is hard to pick up in a video. They were saying the waste gate isn’t sealing completely when it’s cold. It sounds like other people have had this issue and the dealer says that it’s normal... The sound usually goes away when it’s warmed up but not always.

I have the same, it only lasts a few seconds and only if its really cold through the night. Again told its normal.

Originally Posted by kilogram

It's worth noting to BMW that scored cylinder walls have been documented to happen on stock engines, usually coupled with a failed injector, which would indicate that the root cause is in their hardware, not in the software that was changed that is resulting in denial of warranty.

Would BMW then not go on the defense saying that the software changed causing there hardware to fail as it was outwith its design range? (if it even is, with the increased injector duty?)

[///Madgreek1]

Originally Posted by jackstrath

Would BMW then not go on the defense saying that the software changed causing there hardware to fail as it was outwith its design range? (if it even is, with the increased injector duty?)

That's exactly what they will say, I just have to prove it is a hardware only issue and has happened exactly the same way in stock vehicles.

[les anderson]

Originally Posted by jackstrath

Would BMW then not go on the defense saying that the software changed causing there hardware to fail as it was outwith its design range? (if it even is, with the increased injector duty?)

Sure- but now THEY are incurring cost/time and there are more likely to be economic considerations made in favor of the OP. Attorney's cost both sides money/resources- so OP should think it through but personally I think that the fact the car is tuned is VERY convenient for BMW and that it is as likely as not that the tune had nothing to do with this.

If it is me, I am not going silently on this and would start to make that fact clear.

https://en.wikipedia.org/wiki/Magnus...s_Warranty_Act

[les anderson]

Originally Posted by PURE340i

I'm 100% sure the injector failed and scored up the wall. This is becoming a common issue on the B58 and they're just using the flash as a key to get out of the ticket to replace the engine. Try hiring a lemon Attorney so they can prove if the "tune" ruined the walls or not. Tune's don't just ruin injectors lol this has been a issue with BMW since the N54 days... non stop failing injectors.

Seems like around 40k miles is when it is happening too.

[kilogram]

Originally Posted by jackstrath

Would BMW then not go on the defense saying that the software changed causing there hardware to fail as it was outwith its design range? (if it even is, with the increased injector duty?)

I'm sure that would be their reply, but it doesn't address the fact that the same failures have occurred regardless of the software the DME is running. They *should* have to prove the the software directly caused the engine failure, but we don't really live in that world I guess.

[Sgm123]

This has got me concerned about mapping now. Was going to press the button when the warranty runs out in a few months. May have to think twice.

[Farm Boy]

Hi All

For info.
I’ve have a 440i with 13k on it.
It has been running “lumpy” at 1000 rpm with an apparent problem with no5 cylinder.
Garage cannot pinpoint the problem.
This week it is getting a new engine fitted.
It is a standard engine with no mods.

Regards.

[cfm56d7b]

Originally Posted by Farm Boy

Hi All

For info.
I’ve have a 440i with 13k on it.
It has been running “lumpy” at 1000 rpm with an apparent problem with no5 cylinder.
Garage cannot pinpoint the problem.
This week it is getting a new engine fitted.
It is a standard engine with no mods.

Regards.

Interesting dilemma. Thanks for sharing.

Is the garage a BMW dealer? What diagnostics did the garage perform?

No stored codes? Spark plugs OK? Compression test OK?

[Farm Boy]

Hi
Yes Bmw Uk garage.
Injector replaced and spark plug.
Apart from that, I or they seem to be unable to cast any light on it.
It has been in the garage for 5 weeks.
I should get it back this weekend they think.
Can’t imagine a new engine will be cheap.
Hasn’t put me off the car.

Ps
I’m no engine expert.