The Problem Many BMW drivers with N55 engines have experienced engine failures and issues related to bearings inside the engine. When this occurs you’re often stuck looking at complete engine replacements and repairs totaling over $10,000 to fix the issue and repair all of the damages caused.
Is the N55 BMW engine reliable?
N55 Reliability Despite the many misconceptions that BMW’s as a whole are unreliable, the BMW N55 is actually a fairly reliable engine. The four most common problems with the N55 are, in no specific order, the valve cover and gasket, water pump, oil filter housing gasket, and VANOS solenoids.
How long will a N55 engine last?
The BMW N55 motor should have no problem lasting over 150,000 miles, and some owners report getting over 250,000 miles out of their engines.
How long do N55 Turbos last?
N55 Turbo Longevity at 20+ PSI In general, more boost will reduce the lifespan of the N55 stock turbo. However, it is possible for N55 turbos to last 50,000+ miles at 23psi, for example. On the other hand, the stock turbo may decide to let go much sooner even at 20psi.
Why is the N55 so good?
The N55 twin-scroll turbo offers slightly faster turbo spool and delivers peak torque 100 RPM’s sooner than the N54; a characteristic that is not noticeable as each turbo set up spools quickly and delivers impressive torque through-out the low end and midrange.
Does N55 burning oil?
N55s do burn oil but to my knowledge. However, its not nearly that much. Do not quote me on this, but I believe N55 burns about a quart per 10,000 miles.
How long do coils last N55?
We recommend the following N55 ignition coil intervals: Stock – 60,000-70,000 miles. Modded – 30,000-40,000 miles.
How much HP can a N55 handle?
The N55 can handle around 550whp and 550wtq on the stock engine block and internals.
Which is better N55 or B58?
As you can see, from very early on the B58 has big gains over the N55 which it holds right through the rev range. As you can see, the B58 has a very similar boost curve, but makes around 4PSI more than the N55 across virtually the whole rev range.
Is the N55 turbo reliable?
Both the N54 and N55 turbochargers are very reliable. The issue with the N55s is that they have weak internals. Make sure that the VANOS recall has been performed and don’t go overboard with tunes; N55 rod bolts are known stretch.
Is the N55 good for tuning?
Overall, BMW’s N55 is a tuner-friendly engine capable of making, on the stock turbo, plenty of power to satisfy a majority of enthusiasts, all while remaining reliable and driveable in all conditions.
What cars have N55 engines?
- 2009–2017 F10/F11/F07 535i.
- 2010–2013 E90/E91/E92/E93 335i.
- 2010–2013 E82/E88 135i.
- 2010–2017 F25 X3 xDrive35i.
- 2011–2013 E70 X5 xDrive 35i.
- 2011–2015 F30/F31 335i.
- 2011–2014 E71 X6 xDrive 35i.
- 2012–2015 E84 X1 xDrive35i.
What causes N55 rod bearing failure?
Rod bearing failures on the EWG N55s are rare. Like you said, when they fail in the EWG N55s, it’s usually because of high lateral sustained Gs during track driving. The fix is the S55 oil sump parts swap. With that said, with your mods, you are pushing the safeguard limits of the N55.
Why do BMW rod bearings fail?
Lack of proper clearance limits oil lubrication between the crank journal and the rod bearings. This causes premature wearing of the rod bearings. This rubbing also creates debris which can damage other engine parts. Because of this, we see BMW engines wearing through their bearings early.
What is the most reliable BMW engine?
- BMW B58 Engine.
- BMW M20 Engine.
- BMW M50 Engine.
- BMW S62 Engine.
- BMW N52 Engine.
- BMW M54 Engine.
How many turbos does a N55 have?
It has two separate turbos, each powered by 3 of the engines six cylinders. Both of the turbos on the N54 are of equal size and configuration. The BMW N55 TwinPower turbo is a single Turbo engine with two separate exhaust runners powering the hot side of the turbo.
Why is the N55 more reliable than N54?
The main difference is the exhaust. The new N55 engine has one exhaust pipe the feeds from all 6 cylinder (for less fuel consumption) while the N54 had 2 pipes, one feeding from cylinders 1, 2, and 3 and another pipe feeding from cylinders 4, 5, and 6.
Why is my BMW using so much oil?
Some Possible Causes of high oil consumption: Using bad quality oil for your car. Oil leaks. Faulty PCV valve. Valve stem seals.
Is it normal for my BMW to burn oil?
BMWs do burn oil more quickly than most other cars, but this is a normal part of the car’s function according to the German manufacturer. BMWs can burn up to one quart every 750 miles, and even more if it’s a high-performance model.
Do N55s get wastegate rattle?
absolutely N55s have waste gate rattle like the N54s did, EWG hasn’t changed that.”
How often should you change spark plugs N55?
In most modern BMWs, manufactured after 2010 with the N20 or N55 engines, it is required to change spark plugs every 60,000 miles. For BMWs with V8, V10, or N54 or N63 engines, 37000 miles are the threshold before getting new spark plugs.
How often should you Walnut blast N55?
Carbon buildup on the BMW N54 engine (as well as N55 engine) can become severe over time, almost completely closing off the intake tracts and valves. BMW recommends intake valve cleaning in the form of walnut blasting roughly every 30,000 to 50,000 miles.
How much does it cost to replace BMW coils?
The Best in Auto Repair The average cost for a BMW 328i ignition coil replacement is between $128 and $195. Labor costs are estimated between $57 and $72 while parts are priced between $70 and $123. This range does not include taxes and fees, and does not factor in your specific model year or unique location.
What is better N54 or N55?
The twin-scroll setup allows the engine to reach its top torque with 100 fewer rpm. According to Road Sumo, the twin-turbo N54 has better performance than the twin-scroll N55 as it can move more air when running. It is made of two turbochargers and a pneumatic actuator, unlike the N55, which has an electronic one.
How can I make my N55 faster?
- ECU Tuning. The engine control unit (ECU) is the brain of every modern engine.
- Cat-Back Exhaust.
- Downpipe.
- Intake.
- Intercooler.
- Charge Pipes.
- Oil Cooler.
- Oil Cooler Thermostat.