I had the 4.2 I6 in both my 1975 Landcruiser (FJ40) and my 1978 Jeep CJ-7. In the case of a leaking B58 water pump, you'll have to replace the water pump assembly (this is an urgent issue if you notice your B58 overheating). Took my 2019 X4 M40i because the passenger side of the dual climate zone wasnt cooling with the A/C on. Due to the fact that piston rings do not seal the gap between the combustion chamber and crankcase, air and other compressed gas seep through the piston rings and into the crankcase. Really appreciate the info. The car seems to have lost some pep. Never put excessive loads on the engine when its still cold. The B58 engine was named to Ward's World's 10 Best Engines 4 times, in 2016 (installed in the . BMW learned many lessons from the N54 and N55 and used this knowledge to engineer the B58; an engine with stronger internals, a more robust cooling system, and an improved fueling system for increased reliability. [youtube=https://www.youtube.com/watch?v=WzgzSnYDvz4&w=660&h=372]. Thanks for the great read. I think there might be a fault with my traction control coming on whilst im driving,but the traction control light is not coming on on the dash..Ive also noticed the rear wheels are covered in brake dust,more than usual. The most common problems are water pump failure, cracked charge pipe, valve cover gasket leak, and oil filter gasket leak. This increases performance by. Automotive Performance, Tuning, & Modification. In 2010, the 335i received the updated N55 engine followed by the B58 in 2016, however, the model was rebranded to the 340i. Disclaimer: This site contains affiliate links. As mentioned, they are located at the back of the engine making access a bit difficult. If you are interested in learning more about the BMW B58 engine as a whole, check out our BMW B58 FAQ guide. Are both available in RWD with manual transmission? There are two water pumps, and the main water pump is mechanically-driven. And thats the N54 which is regarded as one of the less reliable BMW engines. I speculate this might be something like uneven fuel delivery from one or more injectors. Were very interested to see what the safe upper limits of the B58 end up being. Did BMW live up to that reputation? Crankcase re-design (crankshaft and walls), Updated cylinder head with integrated manifold, Engine hesitation and bogging, especially at lower RPM's. Weve always run 50/50 coolant/water mixes (as with many others since thats the recommended ratio). B58s threads and videos are popping up everywhere of blown pistons on the B58 at 650+/- Hp My point is if the B58 is limited to same horsepower as a N55 then I benefit from a better handling car , Honorable mention for Built N55s from the M2s. 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. Same with the N54 and E9x chassis. As such, the engine was updated and is quite different from the previous 3 engines discussed. Just purchased a 2021 M340. As you say when under load, like a slight uphill, at a constant speed you have this light surging surging. There are countless videos of B58 BMW owners with this exact symptom resulting from a damaged PCV. After any major B58 cooling system repairs, it is vital to pressure test the system to ensure that the repairs were done correctly. On paper, the B58 should match, if not exceed, the N54 for strength and durability. Second, last night I purchased a 2017 340 with 30k. Have a good holiday weekend if youre in the US. 2015 335i 4 series coupe has been a great auto. B58 coolant loss appears a common problem, but it seems minor in most cases. Bmw engines and cars have turned to money pits ,unreliable things that should/must be avoided. The closed deck block is huge, but the N54 never really had issues with the open deck design. The newer engine's closed deck block design is a significant improvement over the open deck block used on the N55. The car I bought is off a 3 year lease and appears to be in pristine condition, so Im hoping this engine is super reliable going forward. Hopefully, it's not as bad as the below image. This was a great article. Ive always read about how BMW underrates their engines, but are there really estimates the B58 is making close to 320 at the wheels?! Meth will help slow down carbon build-up a little bit, but it will still require intake valve cleaning. The ZF 6SP auto gearbox is also perfect to get the power to the rear wheels! Glad I wasnt imagining this weird phenomenon . We'll talk about these limits in-depth later and highlight why torque is the more important number. Many of these issues were resolved or mitigated through recalls and extended warranties. However, it wasnt as drastic of an improvement as some say. The B58 has had minor oil leaks, and some report coolant loss, but the internals of this engine have held up over time while providing ample performance. Otherwise, expect brakes, tires, oil changes, etc to be more expensive than your average sedan. Further, compared to the N54s forged internals, the N55 features slightly weaker internal components, though the cast parts are still high quality and only become a concern well above 500whp. Regardless, the B58 is working up to be a reliable engine in its young career. The new B58 engine uses a water-to-air intercooler integrated into the intake plenum, thus reducing the charged air volume between the compressor and the intake. Some of it comes down to how well you maintain your N54, while some comes down to luck of the draw. The B58 is definitely an awesome engine and were impressed with how quickly things are moving forward with the platform. Forums will be full of "issues"! *Valve cover gasket should be replaced any time the valve cover is removed. For a better experience, please enable JavaScript in your browser before proceeding. Last replaced plugs and coils at 190K. 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. BMW quoted the N54 at 300hp, however, independent testing suggested numbers at the crank closer to 330hp. B58 engine reliability BMW engineers were able to resolve the main issues with the engines that preceded the B58, including: Updating the fuel system Modernizing the cylinder head They fixed issues with the particulate filters A fresh design for the timing chain The B58 oil filter is prone to shearing at the bottom. The pistons are travelling slower at lower RPMs, which results in the high boost pressure sitting in the cylinder for a longer period of time. 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. Your comments are welcomed. Hi guys, Ive got a 2017 M140i and have the pulsing at constant load, usually around 1000rpm and trying to hold speed. 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. Bm3 offers some great tunes, and I think youll be happy with the move over to bootmod. The B58 also features a unique heat encapsulation system around the engine. That said, the N55 seems to be slightly better than the N54 with regards to carbon build-up. A tune and bolt-ons will take the B58 into the 400whp+ range; impressive for a 3.0L engine, but nothing crazy compared to BMWs other inline-6 turbo engines. Im not sure how many as I was never given any job sheets. After replacing it he enjoys the car again and issue is rectified. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register. So, do you suggest to fill coolant tank with 100% original bmw antifreeze coolant, 0% water??? This is a serious issue that most of the time will require complete engine block replacement but fortunately, it is a rare occurrence. One major killer of gaskets is the constant heating and cooling cycles they're subjected to. The new B58 engines are a third generation of turbocharged and direct injected L6 engines. 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. 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. Though, it may be excessive on lower mileage B58's. We are seeing a bit of a resurgence in the I6 recently, now mostly forced induction. The first indicator of an issue was a check engine light. The M20 engine is one of the oldest and most powerful engines with the best reliability. It does not cause decreased engine life or reliability but does affect driving and performance. So far the valves have been cleaned, DME & transmission software has been updated and most recently the 8 speed auto transmission was completely replaced by BMW Sydney but the problem persists. BMW B58 Engine:-The BMW B58 engine is one of the most famous engines for cars. My symptoms were a weird pulsation under part throttle and low speed surging. One problem that may be found are issues with the stock crank hub. So much so that I'd prefer it over the N55. I took my car to the dealership, they did pressure system check, but they didnt find any leaks. The B58 has more horsepower and torque then the N55. A handful of early production B58's experience issues with the crankshaft guide bearing. The N54 is an awesome power plant and i have replaced the rocker cover, gasket, oil pump gasket and one fuel injector. Leaking B58 oil filter housing gaskets can cause significant oil leaks and other related issues, so it really is better to stick with OEM BMW hardware. Although, VANOS work can be done without lifting the engine. Thank you for the comment. So I will let it leak and add coolant and see if over time a visible stain emerges at any location. The N55 is reliable enough, and a significant improvement over its predecessor, but the B58 is stronger and more reliable than its older brother. Great article BTW. My 2017 M240i with 27,000 kms is suffering from the same symptoms. So to me, your statement about 300k kilometres (188k miles) E34, which is 30 years old car sounds like a barely used car. Our garage currently includes a 2008 135i, 2007 335i, and 2008 535i. Plastic valve covers are also prone to cracking and leaking over time, though less common than the gasket. Sometimes, B58 coolant loss can be dependent on other things as well. 423whp/457wtq in SAE correction (439whp STD) for this B58 2018 340i Customer shared this dyno earlier today running the latest v1.6 Stage 2 93 octane (98RON for those in Europe) OTS map. If not exceed, the B58 has more horsepower and torque then the N55 any location deck design slow carbon! Not as bad as the below image 135i, 2007 335i, oil! 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