WARNING Watch This before you Buy A BMW B58 Engine
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- čas přidán 20. 08. 2020
- WARNING Watch This before you Buy A BMW B58 Engine For Business Contact :
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the b58 engines are fucking amazing.
its not a dual clutch. its a zf8 torque converter you don't seem to know much about this engine setup lol
Man and is it one of the best automatic transmissions I’ve ever driven it’s the only one that would ever make me consider preferring over a stick,For driving characteristics and not reliability
Yeah the whole time I watched this I just kept thinking, “what is this dude on about?”
Its a title to attract views..
clickbait title
Bill S. Same here I know many KIDS who drive these thing and they never overheat. People RIP on the b58 platform and it is fairly robust especially for a bmw. Time will tell if there a king of reliability but these criticisms sound like he’s generalizing BMWs. I know 2 people pushing over 570 and they haven’t had one issue, one has 86k miles on it rn
This dude's just regurgitating N54 and N55 platitudes from the forums with no actual B58 knowledge... what a joke, lol.
I’m trying to sum up what I just spent 10 minutes listening to and what I got out of it is the B58 is too new (fact check was out on 2016 models so well before 2019). Because it’s so new I’ve never put my hands on one but BMW has a history of this that and the other thing so you could be in for a rough ride but we just don’t know yet. Awesome...
BMW has a history of problems going back for decades (timing belts popping on the M20, profile gaskets on M42, weak cooling parts on M52 and M54, emissions parts failures on the M57, leaky everything on the N62.). I’m limiting the list to cars with engines that I’ve owned and got my hands dirty on. Most of these issues started popping up fairly early on and were well documented on the forums or the Mike Miller’s of the world while you could still buy a new one. The B58 is now on its fifth year of production and from what I’m seeing online there is nothing that identifies a common trend for a major issue on this engine to date. Nothing. On the G30 forum the biggest recent complaint was that the 2021 configurator wasn’t live in July and the male Karen’s of the world couldn’t build a car they were eager to lease. Compare that to early years of the N54 and US M57.
I was hoping this ten minute video would have a objective repair data, but it’s really click bait.
Thanks for saving me the useless watching of this video. I often wonder why he makes videos when the titles are always along the lines of 'BMW's are crap.'
@@shoman24v bmw is crap but great at the same time
Facts
Click bait probably just likes to hate on bmw!
@@TEFLONDONTRUMP2024 Certainly not crap anymore. They placed 2 in brand ranking in Consumer reports this year huge jump!👍
Coolant loss is common on all vehicle makes and models, I work as a honda tech for 9yrs now and 80% of the cars we do have low to empty coolant in reservoir that had to be top off. For 3 yrs now my B58(M240i) been damn reliable being on stage 2 410whp racing a hell lot every other weekend with zero issue. Don't let this video deterring you from buying a B58, perhaps best engine for modding, they can take a hell of a beating with not much issue.
Coolant loss isn't common on all vehicles
I haven’t seen major issues with this engine yet. I’ve done a few valve covers. Also some water pump like the B46. I know it’s still kinda new but its good so far.
B58 is a solid platform I haven’t had no issue with this engine my car is 2017 bmw still using this platform going into 2021 should say something about this engine.
What kind of bmw is it ?
You had no issues from 2017 until fall of 2020? Wow thats a proper 2.5years of realibility...record braking ain't it? Ffs
Hell, Toyota uses it. That must say something about it
@@antonm8719 go take elementary math classes again
@@musatahir1901 he probably bought it mid 17
I’ve heard of these problems and in a group I’m in with 5000+ b58 members i rarely see these problems. Me myself at 61k miles I haven’t had any problems
I’ve litrally never heard of a leaking valve cover on a B58. Not many B58’s have crossed the 100,000 mile mark either.
@@roadreg1820 theres probably about 700-1000 100k+ mile B58s
@@Imesswithcars that’s nothing considering how many have been made. Not heard any issues like leaking rocker covers etc. Been following this eninge on the forums when I came out in 2015.. plus I run this engine myself.
@@roadreg1820 Well 100,000 miles isnt alot.
@Chaminda Thushara Ruwan Kasturi I know for Bmw its alot
This guy doesnt know much about the b58.. sounds like a n54 fanboy
Seriously the whole video is basically him making things up
@solidmanrock wow! You drive a lot! I’ve got a 2017 with 33k. I’ve pretty much been working from home for the last 12 months though. Anyway, how has the B58 been for you so far? Not looking forward to the day Vanos issues come up, but hopefully that’s a long way off. Any issues at all?
@solidmanrock nice. Thanks - I appreciate the insights. I’d wager there aren’t too many people that have as many miles as you, so that’s great information.
n54 fanboy, I'm sorry this offended do you wanna race my n54? okay thats what i thought
@solidmanrock How much would vanos cost to clean/replace?
03:04 The b58 began production in 2015 not "2019 or newer"..
I guess he was referring to the B30C variant in the Toyota Supra A90/J29 and BMW Z4 G29 but still kinda clickbait
I'm on my 2nd one, Toyota trusts it and so do I.
Toyota tested the version that goes into their vehicle. It surpassed their standard. Toyota was concerned about BMW’s history with poor reliability.
You can trust the ones in Toyota not Bmw. Toyota worked since 2012 to test all the parts and fix reliability problems with Bmw parts.
@@JakeSDN It's not even BMW engines that are the problem. Its everything else. Plastic cooling system, plastic hoses, plastic everything that burns up and falls apart after 70K miles. The chassis and engine are the only things that actually upholds on a BMW. Also not to mention, the stupid shitty BOSCHE electrics that are in all the German made cars.
Mercedes and BMW have strayed away from BOSCHE and have contracted their electrical sources with Samsung and other Asian electric companies.
Toyota got a dedicated B58 version
@@alltheway99 Yes Toyota did Improvments since 2012 so it could pass their quality standards.
2018 440i 50K miles, water pump just went bad. It's covered under the BMW CPO warranty, glad it happened now. One more year to go on the warranty hopefully all the kinks get worked out now! ;) This is the only issue I've had with the car thus far, it might start costing money in the future but it's a blast to drive and nobody ever said BMWs were cheap to own.
Upgrade your coolant hose flange. That might help because BMW uses plastic flanges that go straight to the engine from the thermostat and water pump itself. I just got an aluminum one from FCP euro for my 428i.
@@DuckMcDuckinson how much was it? If you don’t mind me asking
@@TreellSoBrzy 27 dollars
I have a 2019 BMW X3 M40i and have had zero issues so far. But the vehicle only has 13,000 miles, so I’ll have to keep an eye out for these potential issues.
B58 utilizes either the ZF automatic trans, or the Manual, not a dual clutch.
Now the mechanical water pump is a plus because the older engines had issues with them just failing. Though the lubrication problems could cause issues with the rod bearings...
B58 is not a 2019 engine, it’s 2015 engine, it’s been out for nearly 5 years now. It’s a 2019 Toyota engine option, not BMW.
Correct, first introduced on the F30 3 Series back in 2015 for the 2016 model year.
@@alfatech8741 facts..
Mine buid date is sep 26 2015
135k tune since 108k and not a sigle issue
People are running early b58 at 600 hp plus and so far its holding good
Stock engine the limit is 700 ( 600 is a safe zone )
@@flaviomartinho2844 600 hp is not safe, its an single turbo 3l engine, if you wanna go safe just with the software 420-440HP is the best way, if you are upgrading your tubro then we can talk about 500+ HP
I am getting a fault 'excess pressure in refrigerant circuit'. Causes RPM at idle to fluctuate up and down. Uses lots of coolant from the smaller tank. Could the cap be an issue?
One emerging issue that is seen in the UK are rare cases of pistons losing pieces just below the ring lands. It is said to be caused by borewash due to injector failures. The pistons however don't usually looked to have picked up like you would expect from not having enough oil. Running the engine with damaged piston wrecks to coatings on the bores.
I had 2017 340i. Aside loss of coolant, no other issues you mentioned. Ran the car hard. Downpipe, tune with methanol injection. 28lbs of boost. Mann oil filter never showed any signs of deteriorating. Changed oil every 5k and sent oil to blackstone lab for analysis. Aside lead (due to race fuel) everything was in normal range. Before i got rid of the car it had 33k miles
Why’d you get rid of the car ? And how much HP were you running
28 with a stock turbo?
@@ajneely7251 yes. Custom tune stock turbos
Just dropped my 340 off today for a coolant leak, what caused ur coolant loss?
@@tone2378 they told me that it wasn't filled properly from factory. i never noticed any leaks. after that, no issues
2017 340i owner with 94k miles. I daily drive the shit out of my car and haven’t had to add coolant or a single quart of oil. I regularly drive to redline and launch the car off the line as well as high speeds on highways in Mexico ;) Only issue I have ever had is the active exhaust rattle and interior rattles
Just bought a 2018 with 20k miles, I’m shooting for 200k miles
@@bitcoochie4093 do all m340i have b58 engines?
@@arnoldestrada4287 yes
Early model N55 had reported rod bearing issues. Post August 2013, all the rod bearings are shared between the S55 and N55, which i haven't heard them being an issue.
whats that got to do with B58 FFS ???
Nathan, sunscreen please! Been watching for over a year since buying my 2012, 128i, E88, N52. You get burned all the time, not cool. Stage 3 metastasize melanoma survivor. 10 hour surgery, bilateral groin dissection to remove my lymph nods. Beard is kind of cheesy. I'll give it a couple of weeks.
Well he's pretty white so doubt he can avoid it
Shit Nathan you are still good bro, I have been lucky about 50 bc carcinomas mum had melanoma and she is 93. I now take vitamin D cause I avoid the sun. just hope your well champ.
How much labour to replace that valve cover? I hate to think.
One of my buddies who is a BMW mechanic is saying the common problem he sees on b58 is the Injectors are sticking open and washing away the oil in the cylinder wall and it's destroying the cylinder and the piston . Said he had seen it happen 3 times already, and 1 car was only at 50k miles
No issues from me and our group of b58 , 🤙🏼going strong so far
what group are you in? ive been looking to join a b58 group
Is that B58 with the single turbo… no issues so far?
is mhd the best ots tune for the b58? if not one of the best?
Hi Nathan, just wanna ask do you read and respond to more of your comments than Dean does? I asked him a few things about maintaining amperage during coding and even asked if I could pay him to do me some coding on my car. But he doesnt really seem to read his comments lol or atleast he hasnt yet after afew days. Can I ask you the questions I had? (i live in uk so thought it would be better to ask him first lol but got no response)
Love the videos, I think I've been subbed for a while but I always come to either you or Dean for problems with my BM which is like every other damn day lol.
I really wanted a b58 but ended up with a n54 vert because I got a amazing deal on one in the UK but its mega unreliable lol and I wanted some coding and crap done to it.
Thanks!
I was curious about potential reliability as Toyota was adiment about reliability since they too are putting their namesake out there and they demand reliability.
I've heard of pcv issues but not about the cover leaking.
Yeah okay, I got this video in the first few seconds. Its been out since 2015 for five years now. And they in most BMWs in Europe too with 40i. Most of the 2015 cars are now between 60k and 75k miles now. I've heard about the coolant loss issues but they not very common even on cars that's got a stage 2. They highly tuneable motors. So whatever problems they have will be resolved by the massive aftermarket tuning companies even in Japan that's developing parts for it, because its in the new Supra.
On my M240i the cam cover failed causing a coolant leak that caused an injector failure and misfire. This happend around 10k miles and was sorted under warranty (took about a month, they only replaced the injector but didn't sort the cam cover and it happend again). BMW refused to put a camera down into the engine to see if it caused any scoring.
was there any white smoke from exausth and maybe hot turbo or hot air around turbo going into exaust. My computer says injector failure and misfire also. Limp mode on and white smoke
@@davidzagar8499 you need to get it checked out. Terri not to drive it. A little problem can lead to a big problem.
Good info thanks
The coolant loss issue is really annoying, I had been experienced twice over three years, each time required nearly 1 litre fill up. Not sure where it went to.
Did you get this sorted? Some say replacing the cap fixed their issue.
Drat! Suffering from a moderate "car fever" for a 340i (2017 or 2018). This vid is curing my fever. Doggone it!
For Europeans it also comes in all those cars, not just the 140i. It comes in all x40i models.
I have a 2018 540 with a stage 1 tune 32 k miles I have no issues
Wasn't this engine out in 2016?
Bro what kind of bmw should I bay buy
I got a B58 2016 340i tuned it to 385WHP and loving it no issues just regular maint. and good to go!
What mods have you done to get to 385? Also, are you rwd or xdrive?
@@recklezz_9738 So a stage 1 ECU Turbo tune with a stage 2 Tranny tune no bolt ons and has been running mint with hard driving most days its also RWD so A LOT of torque at very low REVS . hope this helps
Great video! Would u do this kind of review on the S55 engine?
4 major problems but its too early. Lmao Hey Nate, what are your opinions on the 530i before i buy one. They had me on my 550gt and im not about to be fooled again.
The b58 has been out since 2015.
Look this is overblown. The radiator cap o-rings is a problem overtime but so is improper flush-fill of coolant at the assembly plant and service centers causing air gaps in the line which overtime makes it look like its drinking coolant. Sometimes the coolant tank under pressure developes leaks as well. The VANOS valves are redesigned and largely run by two magnetic actuators near the rear of the engine and is reachable. Oil filter disintegration usually happens because the mechanic is in a rush and yanks the filter out since its on an awkward angle.. its user-error and the fact people run too high on oil change intervals (BMW fault on interval recommendations). The only thing that is a potential problem is the gaskets and the expensive valve cover. THAT I am afraid of but that is a problem for any BMW not just the B58. Surprise: the B58 is a commendable reliable engine from BMW. It really is a gem.
Is a miracle if you find a E24 M6 in great condition for less than forty.
Holy crap I thought you bought something with this engine haha.. Great vid tho. *Wait...(with slightly squinted-eyes)... or DID you buy something with this engine!?. *insert Dr. Evil laugh* hahaha..
Nathan how does the N54 make large dyno numbers with out the rod bearing issues you see in all of the M car motors. Could you do a video on the highest horse power BMW engines and do a segment on your knowledge of the N54.
I don’t think rod bearing issues is due to power, it’s because the clearances are too tight.
I don’t understand why people bring up ROD issues..every car manufacturers had ROD issues especially when you put strees on ant engine..Porsche,GTR and dodge have these issues
This engine comes in literally everywhere, from BMW 40i models, to the toyota supra, to the incoming Ineos Grenadier and the Morgan plus six. Not to mention that all models with the B38 and B48 use the same architecture as the B58. There is a reason why it's so widespread...
for the grenadier petrol or diesel, I will order one next month my intention is to travel Australia
Hi Nathan, do you work on other peoples cars?
Drove an e90 325 i, sold and bout an b8 Audi a4. Bmw felt a lot better to drive. Looking at a 2016 340i with M performance package, just worried about mileage. It’s currently at 80k miles, is that too much on a b58?
No. Should be fine as long as normal maintenance is done. Some people have even went past 80k already past that and say that haven't had any issues(one guy in one of the comment threads has 136k on their B58 with a tune and says he had no issues)and the issues he addressed in this video are all over the place are just not true at all so I'd rather not listen to the video since most of its false amd read some of the comments from some of the actual owmers or look threw some of the bimmer forums and look threw it yourself case you have any concerns on issues occurring but other than that it should be fine as long as normal maintenance is done.
What about a e450?
Can't even make a radiator cap that works.
Yeah me too , I haven’t seen any of the issues this guys talking about , more common with the N54 N55 engines but haven’t seen it with the B58.. only with the coolent that I’ve heard some issues but Not so much the other stuff he’s talking about
It is a good engine been on go for 6 years
I have the same problem in my B58 "fucking plastic valve cover leak" luckily bmw replaced the rocker cover with a new one under warranty
WARNING read the comments before you watch this...this guy doesn't know anything about the B58 or the 8 speed zf..alot of guessing and bullshit..BMW should be able to sue people like you.
b58 is solid dk what he's talking about, my dad has had his b58 for 4 years. Trouble-free ownership of the 440i he can attest to that.
What about those who tune it to get another 60+ HP. How does that affect the engine and components. Does it put more stress and wear?
The b58 engine can hold up to 700hp..so 60+ is nothing..keep your oil change up and check coolant every week…I went alittle thicker on oil because Ow20 is to thin..I went 0w40
@@drearia788 Thank you!
This engine came out in 2015? Just technical updates since then. There may be occasional issues but I think we know now they're reasonably reliable.
PS had my VANOS solenoids replaced - so that's fair. They get gunked up I think. Cheap part but a couple of hours labour 😔
Needs more regular oil changes than specified by manufacturer
There is a B58 Enthusiasts group on Facebook that highlights mods and failures points, which usually happen in that order.
Do you have the link to it?
Its called b58 enthusiasts and people are pushing this engines on stock block to 700hp
Many of them
The ones that had issues was related to not enough fuel.
Early testers
Hpfp stage 2 is required
Safe zone on stock block is 600 hp with proper fueling and not relaying on meth as fuel.
Piston rings is the weak point of the engine
Not weak at all in my opinion if makes 600 no problem
136k on mine being tuned since 100k
No issues whatsoever
Maintenance is key.
I really liked this chanel but after owning one and knowing more about this engine that this guy knows i just lost my interest.
Do some homework before recording.
Too much wrong information.
@@flaviomartinho1753 you got that many miles on your b58 already????damnnnnnn
I have a 2000 740il and I want to swap a non-vanos 4.4l
Is this sensible- if so would a 2007-2008 be best choice?
2019 and newer? 2017 bmw have the b58.
What??? These issues are still present today? I thought BMW learnt their lessons with coolant systems from back in the M54 days.
Actually those issues with them were mainlu with the 2016 first gen B58s(when they first came out in any BMW). After that it wasn't a issue. BMW updates the B58 nearly every year plus there's different versions that may vary with different parts(not A lot)from other with the rest of the parts still being the same.
As a 2020 540i owner I am seriously hoping the B58 turns out to be quite reliable in the long term. Good info and I guess I will keep a close watch on my coolant level.
The coolant issue was taken care of a long time ago. That was a problem when they were put in the first bmw's to have them(the 3 series). Was solved later on.
Its a wonderful car mine is 2018 540 m sport , power is enough
Update on car???
@@angulo3047 My car has been fantastic. No coolant issues, but I think my 2020 has like a 3rd generation B58 engine. I'm on the 5 series owners forum almost every day and coolant issues are present for M550ix owners with their N63 v8's, but quite rare for 540 owners as these did not have first generation B58 engines.
Worst case scenario if it goes bang!!!! You can pick up an engine for under 5k
You know the b58 comes in the 140,240,340,440 and 740i for Europeans as well it’s not just America
640i has one.
Coolant loss is from cap and evaporating. Totally normal. Very minimal.
Australia and Asia get the M140i as well.
I currently own an n54 powered 335i and am welcoming the b58 once it becomes into my price range
I have an 335i N54 as well and im thinking about selling it and getting a 340i….or maybe switching over for a mustang gt 👀
@@acuadras12 nice! I'm not there financially so I'm in the process of rebuilding my turbos and trying to make my n54 last a few more years
in switzerland an germany we dont have these problems with the engine. :/
Another reason to keep my E90 330i with the N52B30. BTW: I love the BMW in the background
keep it lol
Subscribed. Good video man, no bs, no faffing about. Just solid straight to the point information. Thanks!
Didn't n55 get upgraded rod bearings around 2014 to alleviate the problem?
Yes this is what I read too, N55 got rod bearings from S55 around that time so most F series cars using N55 should have the revised rod bearings
S55 bearings and electronic wastegate from 2014
Don’t know what this guy is talking about, these b58 been very solid and reliable and powerful! He probably made this video to gain views. Coolant tank cap goes bad??? Yes it does but I happens after 7-10 years especially when tip breaks off 10yr+, bmw recommends overhauling all cooling system every 5 years just in case, so neglecting cheap drivers create problems themselves….. B58 is great, everyone knows it, even Toyota! B46 has issues with plastic return cooling pipe and it can kill the engine quick, that’s true, they have a recall now, but b58 using rubber cooling pipe and no issues there.
No leak no oil burns strong internals B58
The only reason i came back to bmw after my last bmw being a e 46
My car is stage 2 and i am at 136k and no issues.
One of the best engines bmw ever made.
B58?
@@carboydorifutoparty3976 yap
@@flaviomartinho1753 sorry for the late response but I wanted to ask did you have any issues with the valves?(since I heard that they usually need to be swapped for carbon build up at like 70-80k).
@@carboydorifutoparty3976 no issues
That was common on the n54
The b58 i seen some being check for carbon and at 70/80k still good
I tuned mine to 400hp and I'm screwed now
An engine that's been in production since 2015, too early to tell 🤔
B58 huggers coming out of the woodwork
Engine’s actually from model year 2016 not 2019 so its been out for a little while we haven’t really seen any B 58 engines with over 100,000 miles yet so it’s gonna be interesting to see how these cars hold up over time as much of a good rep for the most part the dissension has I have high expectations for other than the problems that you mentioned Nathan but good video
i have 440i with 99 000 km :D
@@Noizy-te2zz hows the car doing at 100k?
@@zlord1199 i bought it at 82k km, now after 5 months i have 101k km, not mileage!, nothing wrong yet with the car hopefully and i google about b58 and its really strong and reliable engine, just right maintenance and i hink i shouldnt have big 'problems', i had at dealership bmw on last service, and they set on idrive to change oil at 30.000km but i will change at 15km probably
@@Noizy-te2zz hey do you still got the car ? I’m on point to buy one at 115k kilometers. Did you got problems ? After 100k?
I have 82 kmiles now on my 740i, and just had to replace the coolant tank and expansion tank...
I have seen 740i for sale with over 100 kmiles and they seemed ok.
For a company like BMW this is a shame...
Sounds like a good old boy too me...
In the market for an M240i, judging from the comments the guy doesn't know what he's on about. Skip!
Bro these are not issues, regular maintenance. 🙄🙄🙄
Not going down well with the fans this info is it bro😂
I was unfortunate enough to have my oil filter disintegrate. Bmw accepted no responsibility and I'm left with pieces of the filter everywhere. £45.000 car
@User968 I found out around 30.000miles
That‘s because of the oil filter. Don‘t buy oil filter from the brand „UFI“ they will destroy your engine. The Original Oil filter from BMW are the „UFI“ ones, a lot of engines were destroyed because of that poor quality oil filter .Buy the brand „MANN“ and you will never have that problem again.
This is a very smart guy, I've watched several of his videos and he's always right on point.
So on point he doesn't know what transmission is mated to the b58 or what year it came out.
he generally doesn't know what he is talking about especially for someone that supposedly works on BMWs everyday.
Nathan, that staircase.... when I close my eyes I see Frank Sinatra coming down from that stairs lol.
Meaning it's a lovely stairs :)
I replaced this comment because of some trolls or scammers.
Most of yall in the comments have your ears plugged screaming "LA LA LA IM NOT LISTENING". He isn't saying that its a bad engine, just be warned because when that warranty expires and you have to pay out of pocket you will be well aware.
Great video Nathan. Why is it so. hard for BMW to prove engine design before selling them to the public? sndh
Not really. The engine's been out over 5 years already so the design seems sound. Yeah there's potential for things to go wrong and time will tell but so far so good. Mine's been faultless in a 340i anyway.. Video seems rather speculative and poorly researched tbh.
Coolant leaks are just the cap, or somebody messed up and punctured the lines. Don’t think this guys knows much about B58 at all. I drive a B58 and I mod it and maintain it myself. None of the problems he mentioned are really an issue. The valve cover thing you can easily just replace the PCV diaphragm for about 100 bucks, easy fix. The oil filter thing is not common at all. The B58 engine was thoroughly tested by Toyota engineers, and if you watch Savagegeese’s channel, they interviewed Toyota, and they said this engine passed Toyota’s rigorous testing reliably. All of these “major problems” are plain bloated out of proportion, cuz it’s a BMW.
So you’re telling me i sold my n54 to buy a newer n54😂
We get all the same models 🤣
Just because you don’t get the 140i in the U.S. doesn’t mean it’s for “europeans only” ;)
americans always think they are the centre of the universe , sad really
I think for most bmws it depends on how you drive the car and if you abuse it way too much you are fucked
ok i got 3 minutes in and realised you dont know what youre on about, ive had 2 of the M240I with the B58 engine in the last 4 years not once did i have a problem with anything you said!
I then thought "maybe i havent owned the car long enough" so i went and did some research and again even with the higher milage engined B58 they didnt show any of your problems you mentioned apart from the small amount of coolant loss.
You need say time and wear in you vid at about 5mins but how would you know? youve already said in a round about manor that you will have to wait and see..Please do your research and stop talking shit!
mostly speculative, no meat
this guy knows nothing about b58s
My biggest concern with the B58 which was not mentioned in the video is that the timing chain and vanos are at the rear of the engine right against the firewall. BMW and Toyota must have some real faith in the timing chain with this engine. The vanos can still be serviced with special tools without dropping the engine.
Given that n54 has practically eternal timing chain due to how smooth the inline 6 engines are running i don't think its going to be a concern. But 4 cylinder b48 engine...
P.S. bmw did have a few 6 cylinder diesel engines with timing chains in the back, they usually lasted long unlike on 4 cylinders. Usually, transmission is removed to replace the chain on these engines.
Oh god... Your informations are so not on point, it hurts my ears. You got wrong even the basic info, lol
Nathan you sound like you hate it..