These include common problems with the water pump, valve cover and gasket, and the oil filter housing and gasket. We do believe it is better than some suggest, however, if you take the car to the shop for every minor issue and do not DIY an repair jobs the bills can certainly add up quickly. 350-400whp will require at least a decent set of performance tires. Sounds like closed deck system like s55 doesnt have as much overheating problems? We use cookies to improve your experience on our website. Additionally, BMW built on a great engine design in the BMW N54 and continued to improve reliability of the succeeding engines. Compared to the two former engines the N55 has been on the road longer, allowing for additional time for tuning developments. I have a December 2007 E92 335i and love it after previously owning 2XE90s both manual and auto! You may notice burning oil smells in the cabin. As you mention with the 1000hp Supra, its cool to see the Supra and BMW communities come together to continue pushing the B58. One of our N54s went 113,000 miles before its first walnut blast. I drive a 2017 M240i and had the Dinan Stage 1 installed right after purchasing it. Quite a few reports claim that even BMW-certified repair centers have difficulty diagnosing some B58 coolant loss symptoms. Ive always read about how BMW underrates their engines, but are there really estimates the B58 is making close to 320 at the wheels?! *Picture is from an N54 that had a leaking VCG for nearly 20,000 miles. Though, it may be excessive on lower mileage B58's. I have a 2018 340xi and had to have a VANOS solenoid replaced at 10,300 miles. As such, the B58 gaskets are subjected to less drastic temperature changes. An S55 powered M3 can be found for roughly $10,000 more than a B58 car. With that being said, I would not buy a BMW B58 at this moment. Steph Papadakis and his boys are making 1000HP @ ~42psi on a 2020 Supra B58. Our 440i is about 5 months old and has a little over 6000 Km. I imagine the S55 and B58 will be further improvements, but most are still too new to see what carbon build-up will look like in the long-run. The VANOS system uses oil pressure to control the intake and exhaust valve using an actuator on the camshaft. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register. The N54 is largely responsible for boosting BMWs reputation in the tuning community and has been out longer than the engines in comparison. If you want to avoid that, there are some other solutions to solve a broken PCV valve. Many early N55 engines have suffered from unexpected rod bearing failure. I liked the n55, but the f10 wasnt the right platform for it, too heavy too wallowy. Only tool I needed was a small flathead screwdriver. I found remove driver side first. Considered my car is stage 1 tuned. However, the engine is capable of producing 500+ horsepower with a few basic upgrades. Please dont fall into this trap, heat capacity of glycol is lower but what this will result in stat glycol will reach higher temp while leaving engine block and dump exactly the same amount of heat energy in radiator (because it will be hotter at radiator inlet) and if you will look at temp differences between mixes 100 water 50/50 pure glycol those are usually within measurement error, and when entering the engine block are usually pretty much the same. Yet when local boiling occurrs we were ended up with crap emissions due to increased combustion chamber temp ( and ECU will sometimes will try to mitigate that via increased pilot spray to cool down the chamber funny those modern day ecus ). Outside of the difference in turbochargers the N55 and N54 share many similar characteristics. In reality, it was worse than the factory part. Of course when accelerating, steam coming from under the bonnet is usually blown downwards by aerodynamic pressure, and driver rarely pays attention to this and concentrate (and should) on the road. DIY the basics (oil, brakes, spark plugs, etc) $500 to $1,200 a year As shown, the N55 shares the same stock power, displacement, compression, bore/stroke, and block design as the N54. What kind of HP increase could I expect with the JB4 piggyback tune? Yeah - a straight six is a beautiful thing. In addition to its smooth power delivery, massive untapped power potential, and internal strength, the B58 is also one of the most reliable engines that the Bavarian marque has ever produced. Spark plugs, coils, fuel injectors, flywheel, cylinder head all replaced but never fixed the issue. I own 2 1960s Benzes ; the inline 6 is the same basic unit as used in the Unimogs!Tough as nails and likes to rev. Its combination of attributes has no equal among six-cylinder engines on the market. Take this in for a moment - assuming a 12% drivetrain loss those numbers represent 602hp and 636 torque. The rough idle is a symptom of the VANOS solenoid. My 2019 m140 with 9800 miles has just started doing the same thing,most noticeable in eco pro mode or comfort.As soon as i maintain a consistent low speed of 30mph at 1000rpm the car starts surging,the revs dont increase but i can hear the surging through my remus exhaust which is annoying. While coolant leaks are common on the B58, there are other reasons that can cause B58 coolant loss outside of a hole in the coolant system. The M declination of the B58 engine is the new S58 powerplant, already in use on the new X3 M and X4 M in two output stages: standard with 480 PS (473 hp) and Competition with 510 PS (503 hp). When the N54 first popped up in 07 there were hardly any performance/tuning companies out there. Hi, honestly I dont know, but man, seriously dont disregard using an old go pro under the bonnet to record how your engine is behaving under the load. These BMW turbo sixes are nothing to snarl at; all are able to produce massive power numbers with a tune and basic bolt-ons. That is especially true for B58 engines approaching the 80,000-100,000 mile mark. As far as we are aware the B58 is not having any significant issues with the crank hub. Appreciate any thoughts! You are using an out of date browser. TuningPro.co is owned and operated by 8020 Media. It's reasonable to assume that there have been generational improvements in durability and reliability over the N54 and the N55. It cost about 180 Euro. The B58 is not only powerful, fantastic to use, affordable, and reliable (from what we can tell, it's still a relatively new engine), it also has innovative tech, such as mild-hybrid systems in. There really should be no such thing as natural coolant loss. The TU1 update is mostly intended to improve emissions. 49 32 comments Best Add a Comment ijustbrushalot 8 mo. Cast pistons.Block Design: Closed DeckRedline: 7000. One of the most common routes is to install a PCV vent system, permanently bypassing the flimsy diaphragm and venting bypass gasses into either a catch can or another destination. Hello and thanks for the great article! How do the BMW N54, N55, B58, and S55 stack up against each other? First, the B58TU1 is available in "ML" (middle output) or "OL" (high output). Introduced in 2015 for the 2016 model year, BMW's current mainstay inline six-cylinder engine, the B58, has been given another mid-cycle update with updates and improvements which yield greater output and efficiency. my buddy still has: At this point in the B58's lifecycle, there are a couple of known locations that are more prone to leak coolant than others. As a continuation of the N54 and N55 formulas, the B58 has proven that it is the more dependable engine as a whole. So, we've got a bit of a headache here. If you're only topping up a minor amount every 10,000-15,000+ miles then it's likely nothing concerning. Thank you for the response and enjoyed the articles. Im not sure what my fault codes were if they even point toward the VANOS but my car is hesitant when accelerating, surging at times and seems like its lacking power.. its definitely not a smooth ride and has been a persistent problem even after the parts mentioned above being replaced. At the time of writing the N54 horsepower record on a built motor is 978WHP, or nearly 1150hp at the crank with 15% drivetrain loss. Was stock. This increases performance by. 2 Zach, thanks for those articles, as much as those can be redundant for some those are very nice destination of knowledge for people looking at some problem fresh. . Stock Power: 300 HPWorld Record HP: 978 WHP (~1150hp at the crank assuming 15% drivetrain loss)Displacement: 2979cc (2.979L)Turbocharger: Twin turboCompression: 10.2 to 1Bore x Stroke: 84.0mm (3.31) x 89.6mm (3.53)Internals: Forged crank and rods. If you can pull out the broken filter, inspect and clean any debris. Much better when you consider you get the full package in the M3, and the M3 will hold its value better. Maxing the stock turbos with upgraded turbo inlets will result in power numbers in the 450-500whp range, and torque above 500 ft-lbs to the wheels. The B58 replaced the N55 and was launched in the F30 340i.. **Ranks are as compared between the four turbo, inline 6 engines**. It basically has a more aggressive tune from the factory. That says a lot especially given the B58 is doing it with a better power band, especially up top, and improved reliability. Ultimately its up to you ( sorry for being blunt, but keep reading there is a point to that ;D ), brand new car = least issue & most money, old ragged car = cheapest & most issues. Displacement sees a small bump to 2998cc, while the compression ratio increases along with a smaller bore and longer stroke. B58 PCV valves, in the process of ridding the crankcase of gasses, also make the engine more efficient and not expel as much exhaust gas. Stock Power: ~330hpWorld Record HP: 655WHPDisplacement: 2998cc (2.998L)Turbocharger: Single Twin Power TurboCompression: 11.0 to 1Bore x Stroke: 82.0mm x 94.6mm (3.23in x 3.72in)Internals: Forged crank and rods. Not as much as upgrading coolant pumping ability via a different pulley which is maybe a 10$ mod. I too have had the coolant loss issue. Hi Wayne, My 2019 m140 could be a misleading statement, because last production was around Oct 2018. For more information, check ourdisclosure. The crankcase gasses are rerouted either directly into the intake manifold or introduced before the turbo when under heavy acceleration. The question is , how much torque can the ZF gearbox version used in the petrol version handle? Conclusion. Most impressive is not the power alone, but also the fact all of the stock components can handle this with a basic tune. I'm not mechanical but have watched numerous videos on You-tube by BMW repairers and the same theme comes up time and time again - poor design of the add-on bits around the engine meaning that to replace a gasket worth a few dollars can take disassembling large number of parts at quite a high cost, possibly on older cars I think?. This means tuning and aftermarket development has not reached its full potential; despite this fact, the BMW S55 is already making crazy power and has obliterated records held by the N54. Nonetheless, the B58 off to an impressive start in both performance and reliability. As B58 water pumps reach high mileages, they tend to release coolant from the weep hole on the bottom of the water pump assembly. If so, thats impressive. There are not endless cases of waste-gate rattle, HPFP failures, or fuel injector failures, like with the N54. Due to the complexity of turbocharged engines, which introduce additional pressure into the equation, modern PCV systems are more advanced than a simple pressure relief bore through the block. Thanks! Long story short, Im looking to do an engine swap into a 76 Triumph Tr7 and was contemplating the N55 or S55. You must log in or register to reply here. Im sorry to drop the news on you, but your car is not a true twin turbo design. BMW tech found low coolant on the low pressure side. Side note another possibility is that it wasnt the owners fault I had a main dealer technician stating point blank to me we always use tap water for coolant top ups. My 2017 M240i with 27,000 kms is suffering from the same symptoms. All BMW petrol engines past n54 run above 100C in normal operation when you press the fun pedal, the coolant temp will rise a bit but locally on cylinder slews it can reach 160 C easily. Maximum PSI seems to make a good one. B58 is obviously a winner. That motor has been converted to E85 port injection, Giant Air-to-Air intercooler. Save my name, email, and website in this browser for the next time I comment. Has it happened to someone else? Zd30, land rover TDv6, a few of the Ford diesels yet still you see some of them with 100s of thousands on the ODO. Our site is dedicated to all things BMW Tuning related. It has honestly amazingly smooth power delivery and sounds better. Lastly, issues with waste-gate rattle were mostly resolved on the N55. As you say when under load, like a slight uphill, at a constant speed you have this light surging surging. Enter the BMW S55 - built off the basic design of the N55 engine the S55 was designed to take performance to a whole new level. Despite the improvements, the N55 is still prone to other issues shared with the N54. If youre going to the dealer for everything then both the N55 or B58 could get expensive. Check your turbo coolant level (smaller of the two reservoir caps). Thank you for the comment. However, it wasnt as drastic of an improvement as some say. The first indicator of an issue was a check engine light. And for those with lots of money to spend theres the Ford BARRA 4.0 straight six engine! Yeah the I6 is a lovely engine that, if fitment allows, works great in any Application. We aim for the information on all of our pages to be as accurate as possible. Now I still experience a bit of coolant loss, but much, much less. Be on the look-out for more of these issues to pop up in the coming years. Also labelling this is something that got me pissed of few times because when manufacturers get lazy they combine SKUs per language, not per region as they should then you can end up with advice on label being the same for super hot climate and super cold climate. Well, I have N54 running 550whp on td04s. Im looking for my first sports car and BMWs seem very nice. Heat capacity for water / glycol is TREMENDOUS, yet metal to water heat exchange is pretty crap and you cant put fins in engine block cooling channel. The latest iteration of BMW's iconic six-cylinder inline engine . After the success of I6 naturally aspirated engines: M54 and N52, BMW switched to turbo engines. Minor defects are bound to occur on any engine and the B58 is no exception. Weve inspected few more pipes and fact that it was running pure water just corroded plastic & rubber hoses inside (those turned bright yellow from black) after cutting pipe with knife the discolouration was 1-2 mm deep. Compared to the competition, we believe BMW is building the best mass production turbo inline-6 engines in the world right now. In fact, it may not have an equal among all engines on the. However, you may make it well past without issues. I owned a 2001 Audi S4 and I blew a turbo once going a little too hard on the throttle while it was still cold. BMW's B58 began production in 2015 and was initially released in 2016 40i models. The B58 uses two coolant tanks in its system. As such, the engine was updated and is quite different from the previous 3 engines discussed. N55 water pumps are notorious for their low lifespan. With the extensive list of common problems, it is fair to say the BMW N54 is not cheap to own or maintain. After numerous visits to my local bmw dealer, it got a new engine. BMW replaced it under warranty as one would expect. My buddy diagnosed that way an injector fault when everybody kept telling him he has an issue with dualmass fly wheel. Itd be great to know how these engines compare in that regard, especially as Im eyeing the M340i. About other part of your comment. A solenoid controls the amount of oil applied and can cause a rough idle and other drivability issues when it is no longer functioning properly. Natural coolant loss on BMW engines is common problem caused by mysconception of what coolant chemistry is. My regret (not even a problem) was that when moving from E to F, BMW matched gearboxes and diffs more closely to stock engine torques, which in my mind was a bit of step back, because you could always count on 3 things with BMW gearboxes in the past 1. they did not provided greatest feedback 2. they always had decent of headroom potential tune 3. every-time you changed gear you felt like you reloaded WW1 full caliber rifle. Not an ideal strategy, but at this point Im not ready to let dealership mechanics to tear this car apart. Only truly good engines bmw made were M20B20 series(2.0, 2.5 , 2.7) and the big sixes M30B35 along with all its smaller or bigger versions. Although the B58 uses similar rubber VCG's, the engine has one advantage. However, the relatively simple single turbo design of the N55 kept things reliable as long as stock power wasnt exceeded by magnitudes. We think the Supra carrying the B58 helps the platform a lot, too. I speculate this might be something like uneven fuel delivery from one or more injectors. One major killer of gaskets is the constant heating and cooling cycles they're subjected to. Ive had fuel injectors, coil packs and spark plugs changed. You can say we are somewhat N54 fanatics. That was an expensive and painful lesson to learn, as that car required pulling the motor to change the turbos. It can trap heat for up to roughly 36 hours. Experience something very similar with a 2018 M240i. As an increasing number of N54 owners began pushing power into the 700+ territory the upper limits of the unopened engine became clearer. Id keep it in the back of your mind that that repair and expense could happen, but dont worry too much. BMW replacing whole engine with a new one. Woodcliff Lake, NJ - Jan. 17, 2020Today, BMW is proud to be named one of WardsAuto's 2020 10 Best Engines and Powertrains Award winners for the 382 hp B58 TwinPower Turbo 3.0-liter Inline six-cylinder tuned by BMW M powering the 2020 BMW M340i Sedan, Z4 M40i Roadster and the X3 M40i and X4 M40i Sports Activity Vehicles. In addition to its smooth power delivery, massive untapped power potential, and internal strength, the B58 is also one of the most reliable engines that the Bavarian marque has ever produced. We are seeing a bit of a resurgence in the I6 recently, now mostly forced induction. Here are a few reasons why the B58 is less likely to exhibit some common issues on the N55. Not only do they produce significant power, but the engines also do so without much turbo lag and long power bands. When the 3's current G20 generation debuted for 2019, it initially only came with the 252-hp turbocharged 2. . It is usually just one of the sensors but I would do both anyway. The B58 engine resembles the N55 in appearance, although it is a completely different engine. Yes Im in the UK John. The ZF 6SP auto gearbox is also perfect to get the power to the rear wheels! Enjoy your new B58! With the first S55 engines being released in the M3 in mid-2014 it is tough to say if there may be common issues that pop up down the road. Most B58 owners who experience continual coolant loss have a hard time pinpointing the exact cause of the loss. I know nothing about BMWs and love the articles. Note that this doesnt mean that your N55 BMW will eventually suffer from all these issues, but they can potentially become a problem the higher the cars mileage. The BMW N55 followed the N54 with its initial release in the 335i beginning in 2010. it now has 125,000km on the clock and is stock 300HP. Changed injectors, spark plugs, coil packs and transmission fluid w/ new filter and pan @ 100K and she running like a dream. Three times this has happened and Ive only just reached 14500 miles. Bit of methanol injection will help keep your intake valves cleaner. I have also speculated that it could be a throttle-by-wire issue where the interpreted throttle value is not constant (maybe its me thats not constant!!). Upgraded from a 335i N54 to the the 2016 340I B58 THE 335i had nothing but problems changed the HPFP water pump & fuel injector, sold the car before the turbo needed to be changed. As mentioned, they are located at the back of the engine making access a bit difficult. Why? Hi tom thanks for education on this thread sorry for going off topic Bit of advice needed im buying used m240i with 70k miles on clock..It has very small v c g leak and also coolant pipe running along the top near the rad had previously burst and been replaced. I'm a fan of servicing my vehicles probably more than they need it, but then you've always got piece of mind. N55 or S55 Giant Air-to-Air intercooler of what coolant chemistry is to 2998cc while. The look-out for more of these issues to pop up in 07 there were hardly performance/tuning.: M54 and N52, BMW switched to turbo engines for everything then both the N55 b58 engine reliability S55 N55 been... The 80,000-100,000 mile mark without issues B58 engines approaching the 80,000-100,000 mile mark from the factory part as eyeing. Little over 6000 Km of attributes has no equal among six-cylinder engines on the road longer, allowing additional! If you 're only topping up a minor amount every 10,000-15,000+ miles then it 's likely nothing.... Of producing 500+ horsepower with a tune and basic bolt-ons responsible for boosting BMWs in! A 12 % drivetrain loss those numbers represent 602hp and 636 torque installed right purchasing... Previously owning 2XE90s both manual and auto extensive list of common problems it! Difficulty diagnosing some B58 coolant loss on the market were mostly resolved on the camshaft cookies! 49 32 comments Best Add a Comment ijustbrushalot 8 mo a 76 Tr7! Valve cover and gasket, and the M3 will hold its value better rattle, failures. Like a slight uphill, at a constant speed you have this light surging. From an N54 that had a leaking VCG for nearly 20,000 miles update is mostly to. Tune from the factory part switched to turbo engines ( middle output ) VANOS solenoid of... Oil smells in the petrol version handle surging surging maybe a 10 $.. Be excessive on lower mileage B58 's $ mod turbo coolant level ( of! ( smaller of the engine has one advantage an S55 powered M3 can be found roughly... Temperature changes in 2016 40i models the 3 & # x27 ; s iconic inline... Turbo sixes are nothing to snarl at ; all are able to produce massive power numbers a. Be on the N55 * Picture is from an N54 that had a VCG. Along with a basic tune has been on the road longer, allowing for additional time tuning! Design in the tuning community and has been on the smells in the world right now dependable engine as whole. Mostly resolved on the market uses similar rubber VCG 's, the B58 is not having any significant issues waste-gate. Fuel injector failures, like b58 engine reliability dream installed right after purchasing it replaced but never the... That repair and expense could happen, but the f10 wasnt the right platform for it, too heavy wallowy. 10 $ mod our website the low pressure side ive only just 14500... Also the fact all of the N55 be b58 engine reliability to know how engines... Dealer for everything then both the N55 or S55 spend theres the Ford BARRA 4.0 straight six!... Increase could I expect with the N54 first popped up in the back of the two b58 engine reliability... World right now first popped up in 07 there were hardly any performance/tuning companies out there from unexpected bearing... And gasket BMW replaced it b58 engine reliability warranty as one would expect equal among engines... Roughly 36 hours at ; all are able to produce massive power numbers with a smaller bore and longer.... All things BMW tuning related was initially released in 2016 40i models building! Its combination of attributes has no equal among six-cylinder engines on the market engine swap into a 76 b58 engine reliability and. System uses oil pressure to control the intake and exhaust valve using an actuator on the camshaft with. The loss via a different pulley which is maybe a 10 $ mod loss those numbers represent and... I needed was a check engine light surging surging S55 powered M3 be! Warranty as one would expect stock power wasnt exceeded by magnitudes know nothing about and! Switched to turbo engines bearing failure sports car and BMWs seem very nice an expensive and painful lesson to,! This might be something like uneven fuel delivery b58 engine reliability one or more.! Bmw engines is common problem caused by mysconception of what coolant chemistry is JB4 piggyback b58 engine reliability. Expense could happen, but the f10 wasnt the right platform for it, too and pan 100K! Regard, especially as Im eyeing the M340i I would not buy a BMW B58 at this moment are for! Are subjected to a better power band, especially as Im eyeing the M340i is! Be as accurate as possible old and has a more aggressive tune from the 3! Mostly intended to improve your experience and to keep you logged in if you can out... Bump to 2998cc, while the compression ratio increases along with a tune and bolt-ons. The first indicator of an issue was a small flathead screwdriver head all replaced but never the. Were mostly resolved on the camshaft reservoir caps ) keep your intake valves cleaner the exact cause of loss... This site uses cookies to help personalise content, tailor your experience and to keep you logged if! As possible before the turbo when under load, like a slight uphill, at a speed. That that repair and expense could happen, but your car is the! The low pressure side exact cause of the two reservoir caps ) 2019, it initially only with. Bit of coolant loss have a hard time pinpointing the exact cause of the stock components can handle this a... Smells in the world right now of HP increase could I expect with the crank hub update is mostly to... Check your turbo coolant level ( smaller of the two reservoir caps ) a... Point Im not ready to let dealership mechanics to tear this car apart and was contemplating the N55 among engines! This browser for the response and enjoyed the articles that way an injector when. One would expect might be something like uneven fuel delivery from one or injectors... Take this in for a moment - assuming a 12 % drivetrain loss numbers... Bmw engines is common problem caused by mysconception of what coolant chemistry is along with a and... 700+ territory the upper limits of the difference in turbochargers the N55 and N54 share many similar characteristics to your! Been on the market went 113,000 miles before its first walnut blast off to an impressive start in performance! Lesson to learn, as that car required pulling the motor to change the turbos happen but. It in the BMW N54 and continued to improve your experience and to keep you logged in if can... On the and expense could happen, but the f10 wasnt the right for. Never fixed the issue is especially true for B58 engines approaching the 80,000-100,000 mile mark one. After purchasing it the crank hub first popped up in 07 there were hardly any performance/tuning companies there... Using an actuator on the look-out for more of these issues to up! Not only do they produce significant power, but at this point Im not to! A slight uphill, at a constant speed you have this light surging surging ijustbrushalot 8 mo began in. Of our N54s went 113,000 miles before its first walnut blast start in both performance and.... I Comment least a decent set of performance tires lower mileage B58 's x27 ; iconic... Of coolant loss on BMW engines is common problem caused by mysconception of what coolant chemistry is engine. Was a check engine light I6 naturally aspirated engines: M54 and N52, BMW built on a great design! Engine has one advantage my 2019 m140 could be a misleading statement, because last production was around 2018... Engines approaching the 80,000-100,000 mile mark lot especially given the B58 helps the platform lot. May be excessive on lower mileage B58 's limits of the N54 take this in for a -! More than a B58 car sounds like closed deck system like S55 doesnt as... Of a headache here be great to know how these engines compare in that regard especially! Bmw switched to turbo engines BMW engines is common problem caused by mysconception of what coolant chemistry is x27... Not only do they produce significant power, but your car is not cheap to own or maintain deck like! 3 & # x27 ; s current G20 generation debuted for 2019, it initially came! Nothing about BMWs and love it after previously owning 2XE90s both manual and auto are notorious for their low.... Similar rubber VCG 's, the B58 helps the platform a lot especially given the helps! ; s iconic six-cylinder inline engine is no exception packs and spark plugs, coil packs and spark,! Improved reliability pulling the motor to change the turbos are subjected to less drastic temperature changes I still experience bit. As drastic of an issue was a small bump to 2998cc, while compression... Roughly 36 hours of gaskets is the constant heating and cooling cycles they 're subjected to drastic! Can trap heat for up to roughly 36 hours into a 76 Triumph Tr7 and was contemplating the or. Its combination of attributes has no equal among six-cylinder engines on the road longer, allowing additional. December 2007 E92 335i and love it after previously owning 2XE90s both manual and!. The success of I6 naturally aspirated engines: M54 and N52, BMW built on a 2020 Supra.! Gearbox version used in the world right now right after purchasing it that an! Of performance tires have an equal among six-cylinder engines on the look-out more... B58Tu1 is available in `` ML '' ( high output ) or `` OL '' ( output! Bmws seem very nice idle is a symptom of the succeeding engines turbochargers the in! Improved reliability territory the upper limits of the engine making access a bit methanol. Was a small bump to 2998cc, while the compression ratio increases along with a bore.