The N52 was predominately found in the E90 i, i and i, and the E60 i and i models, as well as various others such as the i, X1, and Z4 to name a few.
The N52 was produced from up until when it was replaced by the turbocharged N20 engine. It is the successor to the M54 which was used in various E36, E39 and E46 models. Given the long production history, BMW was able to perfect many aspects of the engine over the production lifetime. The engine even won top 10 best engines in both and However, the N52 still has its fair share of common reliability problems.
We also wrote an N54 engine problems guide you can read to compare the two! These are the most common engine problems, outside of these problems the car is very reliable and problem free. However, I will mention one other common, non-engine related issue is the window regulators.
This results in the affected window not being to roll up or down. Replacement cost is approx. The VANOS solenoids are responsible for controlling how much oil flows to the cam gears, which in turn controls the opening and closing of the valves.
Failing VANOS solenoids will result in a loss of power, poor idling, bad fuel economy, trouble starting, and the occasional limp mode. These solenoids commonly fail every 70, miles or so.
We recommend replacing them at this interval as they are likely having a negative affect on performance, although you may not know it yet. The 2A82 and 2A87 codes are for the intake and exhaust solenoids.
The solenoids are exactly the same, so you just need to purchase 2 of part to replace these. It is most prevalent during cold weather or on short trips. The ticking noise is caused by the hydraulic valve adjusters, also known as lifters, not getting enough oil to function properly.
This is only prevalent in and earlier models.
N52 engine reliability?
The designs of the lifters and cylinder head was changed in December of which fixed this issue. Most of the time bleeding the lifters is a temporary fix that may work a few times in a row until a more permanent solution is needed. The permanent solution is to replace the lifters and the cylinder head with the newly designed post parts.Its crankcase is made entirely of magnesium and aluminum, a first in the world of engine construction. BMW used Alusil aluminum cylinder sleeves, which offer high heat conductivity, and cast them into a lightweight magnesium block creating one of the lightest production engines of its size class in the world at kg lb.
Producing 63 kW It was awarded as one of Ward's 10 Best Engines of the Year in and Technologically it is even more advanced than the new N54B30 bi-turbo, which is based on an older M54B30 design and lacks several improvements that BMW has made for this engine. The N52 is BMW's 12th generation production straight-6 engine. The N52B25 comes in two versions, both displacing 2. The N52B30 comes in three versions, all displacing 3. All BMWs are available with this engine in at least one version.
Category : BMW engines.
BMW N52 straight-six - lightweight and modern engine
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BMW N52 straight-6 Engine
The system also includes full diagnostic and code clearing capability. Any future ESS software updates can be received by email and loaded directly to the car. The stock ECU software will be saved and can easily be restored in the future. This can cause catastrophic failure when combined with boost!
We will not support any issues whatsoever on a N52 equipped with aftermarket headers. System Components: - Vortech V3Si internally lubricated supercharger unit. Speaker Upgrades. Amplifier Upgrades. Subwoofer Upgrades. Big Brake Kits. Brake Fluids. OEM Replacement Parts. Full Exhaust Systems. Exhaust Sound Controls.
Axleback Exhausts. Engine Performance. Performance Software. Intake Systems. Air Filters. Air Scoops. Rear Diffusers. Side Skirts. Exterior Cosmetics. Forced Induction.Engine guide - Inside the N52 straight-six. A look inside this high-tech, lightweight straight-six. Words: Elizabeth de Latour. The N52 came in two flavours: the N52B25 used a bore of 82mm and stroke of The N52 used an engine block which used magnesium and aluminium for the crankcase; magnesium is extremely light, but it is at greater risk of corrosion from water and it can creep under load at high temperatures.
For this reason, pure magnesium or magnesium as a conventional alloy is not suited for dealing with the sorts of loads and forces that central engine components have to deal with. Because of this, BMW employed a magnesium alloy for the crankcase shell, while an aluminium inner block was used to counteract the disadvantages of the magnesium.Neta brookline
While capacity never changed, outputs varied drastically across the range for both engines, with changes in power coming from different resonant intake manifolds and different software maps. Peak power was developed at rpm while peak torque of lb ft was available between rpm.
The most powerful 2. The least powerful 3. At the other end of the scale sat the hp variant, with peak power being developed at rpm, while peak torque of lb ft was produced at rpm.
For American readers, the less powerful 25i and 28i variants of the engine, along with the hp version of the Z4 3. The three-stage manifold features electronic valves that redirect airflow to the cylinders that require it most at any given moment.
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BMW N52 Tuning
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I forgot my password. Sign in with your social identity. Show results from selected filters below:. Check All. Uncheck All.It is another 2. It appeared in as an alternative to popular at that time M54B25 engine. Apart from previous version of M series where every new motor reflected evolution of the previous one, new engine turned out to be absolutely new product.
N52 engine is based on revolutionary Aluminum-magnesium cylinder block which is lighter in comparison with the previous version. It is also equipped by new light connecting rods, pistons and modified crankshaft. At the same time new Valvetronic lifting system was also added in order to regulate the level of inlet valves. It made it possible to increase power as well as reduce fuel consumption.BMW 325i N52B25 2006 Test Drive
Variable-length intake manifold DISA is used on the inlet. At the same time injectors are installed in cylinder block head. This engine was used in BMW models with 23i and 25i indexes. Alternative to N52B25 engine was introduced after 2 years of its production.
It was later replaced by N53B25 motor as well as its lighter N53B30 version. Nevertheless, N52 2. Its production was stopped only in N52B25U1 — is a basic engine with decreased level of HP with the help of intake manifold.
The specifications are as follows: power — HP at 5, rpm, Nm of torque at 3, rpm. It was used for BMW models with 23i index. N52B25 — was equipped with another intake manifold providing it with the following specs: power — HP at 6, rpm, Nm of torque at 2, rpm.
N52B25O1 — is the most popular version of engines from the series with the following specifications: power — HP at 6, rpm, Nm of torque at 2, rpm.
It was used for BMW models with 25i index. The most common problem in N52B25 is high level of motor oil consumption. This is due to thin oil rings which are carbonized rather fast. At the same time valve stem seals goes out of order rather often.
The only solution to this problem is replacement of damaged components. New N52NB25 version did not have such problems. It was firstly introduced in and has black cap.The N52 replaces the M54 and had a lighter engine block, an electric water pump and variable flow oil pump. Valvetronic was also added.
The camshaft is also of a hollow design, to save weight. We detail the best approach to N52 tuning and show the optimum mods that work. BMW N52 provide a fun base for your project and with carefully picked sports mods like a remap, turbo upgrades and camshafts you will enhance your driving enjoyment. There were 2 versions, the N52B25, and N52B The differences between these engines are the N52B25 has a smaller bore and stroke, so pistons, crank etc are different, but they share the same block and head.
The greatest mods on an engine are in our opinion the ones that give the best power gain for you spend. Altering your N52 camshaft will make a dramatic difference to the engine bhp. Choosing a higher performance camshaft profile raises the bhp accordingly. Race cams, increase the higher rpm power band but as a result the car will not idle smoothly and low end power nearly always suffers. Some N52 engines N52B25,N52B30 respond better to more or less aggressive camshaft durations check your engine on a rolling road.Nametests app
ECU flashing allows a tuner to to establish the full potential of all the upgrades you've fitted to your N Plenum carries the air during the suck phase from the air cleaner and allow it to be pulled into the engine cylinders. We often see intake manifold are crying out for a performance upgrade, although some makers provide fairly well optimized intake manifold. But adding forced induction is the only way to make significant power gains on both the N52B25 and N52B30, as the engines are quite well setup from the factory, leaving little room for improvement without resorting to major upgrades and work.
The more air to get into an engine, the more fuel it can burn and uprating the induction with a turbocharger upgrade makes massive power gains. When an engine has a turbocharger parts are more reliable and you will discover turbocharged engines will have many forged and stronger components. However you'll find engines have weakspots or components that are more prone to fail. So discover these restrictions and upgrade to more solid crank and pistons to handle the power.
We've seen people spending a loads on turbo charger upgrades on the N52 only to have the car catastrophically fail just after it's been enthusiastically driven.The BMW N52 is a naturally aspirated straight-six petrol engine which was produced from However, in markets such as the United States, Canada, Australia and Malaysia, the N53 was deemed unsuitable due to the high levels of sulfur in the fuel. Compared with its M54 predecessor, the N52 features Valvetronic variable valve lift a lighter block due to the use of a magnesium alloy  and an electric water pump replacing the belt-driven water pump   and a variable output oil pump.
Higher output versions of the N52 use a three-stage variable length intake manifold also called "DISA". The N52 engine block is made from a combination of magnesium and aluminium. Therefore, BMW used a magnesium alloy for the crankcase shell, with an aluminum 'inner block' to overcome the limitations of magnesium alloys.Mame dat repository
The 3. Variations in power output are often due to different intake manifolds and variations of engine management software. InBMW recalledsix-cylinder models i, idue to reports of the heater for the crankcase ventilation valve short-circuiting and causing a fire.
From Wikipedia, the free encyclopedia. Archived from the original on 10 February Retrieved 28 October Retrieved 21 October Archived from the original on 22 October Archived from the original on 9 February Retrieved 22 October Archived from the original on 29 May Retrieved 27 October Retrieved 7 May Retrieved 30 May Retrieved 17 August Archived from the original on 16 August New York Times.
Retrieved 13 August Namespaces Article Talk. Views Read Edit View history. Help Community portal Recent changes Upload file. Download as PDF Printable version. Wikimedia Commons. Production of previous model continues in parallel.
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