Another possible cause for problems is fluke manufacturing defects. I have a 2009 BMW X5 (E70) and I am getting a loud whistling sound when I accelerate. The exhaust downpipe is the first part of the exhaust system on the N55 engine. 66. Give our parts specialists a call at 1-888-280-7799. 2008 bmw 328i . ... update on e70. what whistle are you referring to. I've read quite a few BMW forums and this seems to be a common problem with BMWs. With decades of experience working with BMW vehicles, our expert mechanics help you continue to get the best performance possible out of your car while following all of the necessary maintenance requirements. While variations of the N55 are still in production and use today they began to faze them out of BMW vehicles after BMW introduced the B58 engine in many of their newer models. A whistling noise from this motor can be caused by a faulty crankcase ventilation valve. Many BMW drivers with N55 engines have experienced engine failures and issues related to bearings inside the engine. Hissing noise when pressing the brake pedal after shutting down the engine Whistling at idle speed Whirring / rattling from the area of the coolant line from 2000 rpm Clicking sound after the engine stop Clattering noise from engine compartment after the … When I tighten the oil cap , the squeal re-starts. When this high-pitch (whistle) sounds comes with the engine cold, often on deceleration, it often points to an intake vacuum leak. Because this issue has been documented occurring in both new and older models and as well as in high mileage and low mileage vehicles, sometimes the issue is simply a malfunctioning part or an undetected and unfortunate defect. 1- after spirited driving it is a constant whistle when slowing down (brakes not activated) and very low compression. The OEM downpipes have catalytic converters on them, for emissions purposes. I also heard a loud whistling noise. In June 2014, a recall was issued for BMW E82 1-Series Coupes that had N51, N52 or N55 six-cylinder petrol engines and were available for sale from 1 October 2009 to 30 April 2012. is it separate or built in valve cover. -The whistling seems to start around 20 mph and continue as speed increases but cannot be heard at lower speeds. 79. n55 Howling Whistling noise - YouTube N55 engine, drivetrain, exhaust tuning topics. While moving from stationary at between 40km/h-70km/h I have this whistling noise from the rear like a whistling kettle. New Member. Rep. 22. When buying a BMW you expect to receive years of superior comforts and performance and sudden issues can make it less of a dream car and more of a nightmare. BMW of North America, LLC (BMW) is recalling certain model year 2008-2013 128i and 135i coupes and convertibles and 1 Series M coupes, 2006-2011 325i, … the result is; broken crank, out of shape rod and the grit has ruined the cams and the head. For BMW Oil Seal Remover Installer Kit N40 N42 N45 N46 N46T N52 N53 N54 N55. The whining noise crescendoed to the point where it was constant, the heat started blowing cold air even with the temperature all the way up, and then the critical engine temp light came on, putting the car in safety mode (only allows low revs and no quick acceleration). If your BMW check engine light (or service engine soon light) stays on, it means that the Onboard Diagnostic System (also known as Digital Motor Electronics DME) has detected a problem with the emission system, engine, or transmission. The Importance of an Alternator Bracket Seal in a BMW, Regular maintenance and tune-ups are absolutely essential for the efficiency …. when i accelerate, usually from 60-70 i hear a little whistle but that is just the sound of the engine. It may disappear after the engine has warmed up. Our mission is: To promote a limited number of quality off-road motorcycle events, encourage responsible off-road motorcycle recreation, and provide our members with unique and enjoyable riding opportunities. Whistling noise- does anyone have any idea what this could be? https://www.e90post.com/forums/showthread.php?t=1197637, BMW N54/N55 E-Series Electric Water Pump Replacement DIY (Video), Genuine BMW N55 Oil Filter Housing W/ Oil Thermostat, http://f30.bimmerpost.com/forums/showthread.php?t=1372527, http://www.e90post.com/forums/showthread.php?t=938455, https://bmwsparkplugs.com/products/bmw-vanos-solenoid-11-36-7-585-425, https://bmwsparkplugs.com/products/bmw-vanos-solenoid-11-36-8-605-123, The 3 Most Common BMW M60 Engine Problems, BMW B46/B48 Intercooler & Heat Exchanger Guide, Tuning Pro – Automotive Tuning & Performance Guides, High Pressure Fuel Pump Failure (HPFP) – Mostly older models, Burning oil smells, or smoke coming from valve cover area, Engine overheating significantly – usually rapid over-heating once the pump fails, Starting issues and potential stalling of vehicle. Its not very loud but very annoying. | BMW Forums - SpoolStreet all bmw's, at least all the e46's i sat in have the same whistle. It will probably be a collapsed hose somewhere in the intake system, but it could even be something as simple as a loose gas cap. It is powered by a pulley and belt system. The Dinan D760-0038 Carbon Fiber Intake System for the BMW N55 engine is an attractive high performance upgrade that increases performance primarily by improving mass airflow through the system while still proving adequate filtration. If you here a “police siren” type of noise that is gradually getting louder, this is a bad sign. BMW N55 Upgraded Intake Summary Upgraded intakes are an excellent, cost-effective way to free up some extra power and sound from the N55. New Member. However like any other car they are not immune from sudden issues and recent models featuring the N55 engine have seen multiple problems related to bearing failures. However, sometimes that whistling sound is caused by bigger problems that only a certified expert can properly fix. How Does a Bad Thermostat Affect Your BMW’s Performance? While in motion, the car makes a whistling sound that sounds like it is coming from the front tire area. I would remove the engine oil cap and see if the noise goes away. Hi, my name is Marty. Call BMW, looks like I’m missing a few parts.... update on e70. Tune-only N55’s may expect power gains in the 5-10whp ballpark with similar torque gains. If you contact Your Mechanic they will send a technician to your home or office who can locate your noise and explain what you need to do to fix it.. BMW E30 M3 Parts; BMW E36 Parts; BMW E36 M3 Parts; BMW E39 Parts; BMW E39 M5 Parts; BMW E46 Parts; BMW E46 M3 Parts; BMW E60 M5 Parts; BMW E82 Parts; BMW E90 Parts; BMW E90 M3 Parts; BMW E92 Parts; BMW E92 M3 Parts; BMW F30 Parts; BMW F80 M3 Parts; BMW Z3 Parts; BMW Z4 Parts; Most Recent Additions BMW F82 M4 Parts; BMW F83 M4 Parts; BMW … share. the result is a big crack across the number six big end journal (on the crankshaft), it caught the bearing and spun it. I've read quite a few BMW forums and this seems to be a common problem with BMWs. That increase of pressure could be what’s causing the whistling sound. Clicking noise for approx. Cabin Air Filter Replacement ($122 - $165) in Woodbridge, VA. Heater Control Valve Replacement ($298 - $363) in Potosi, MO. Similar to the N54, a leaking valve cover, valve … When going into the higher rpm ranges I'm getting a whistling noise some people say the tips some people say its the back pressure so what can i do to fix it ... BMW … The N55 replaced the BMW N54 engine and was introduced in the F07 5 Series Gran Turismo.. The BMW N55 is a turbocharged straight-six petrol engine that began production in 2009. The problem is that I don't think my 2009 BMW X5 has this part. report. Hanita Coatings. All out and time to rebuild. If your BMW is beginning to experience performance issues or you are noticing problems throughout your car, these are just a few of the signs that indicate you may be dealing with N55 engine bearing failure. F10 / F11 Model Year: 2010-2016 Model Year: 2004 - 2009 Chassis Code: E60 Body Type: Sedan / Wagon / M5 Model Year: 1995 - 2003 Chassis Code: E39 Body Type: Sedan / Wagon / M5 6 Your email address will not be published. I did check the alternator pulley like Suthtow says. 2011 bmw 335ix N55 engine howling noise. If the valve fails there will be excessive suction on the crankcase and you can get a whistling noise from the crankshaft seal. This could be a faulty gasket. BMW N55 Squealing Noise Fix DIY. We attempt replacing the PCV valve with an aftermarket solution and eventually replace the entire valve cover. When you add extra power to your car it often means added boost, timing and AFR to get that extra power. From what I read, it seems to be the throttle body boot. BMW of North America, LLC (BMW) is recalling certain model year 2008-2013 128i and 135i coupes and convertibles and 1 Series M coupes, 2006-2011 325i, … PCV Engine Cylinder Head Valve Cover, Replace 11127552281 Compatible with BMW N52 Engine E70, E82, E90 - 2008-2013 128i, 2007-2013 328i, 2008-2011 528i, 2007-2012 X3, 2007-2010 X5, 2006-2011 Z4 YYW Engine Cylinder Head Valve Cover FOR BMW X1 X3 X4 X5 X6,135i 335i 435i 535i 640i,N55 3.0L 11127570292 The following tips will help you avoid the lifter ticking noise in your BMW. However, if you are driving a BMW having an older N52 engine, then you might be familiar with the lifter ticking noise, which can be frustrating. Whether you’re looking to schedule preventative maintenance for your BMW or you are in need of engine repairs and rebuilds because of N55 bearing failure our shop has all of the needed equipment and materials to get the job done right and as affordably as possible. Research, compare and save listings, or contact sellers directly from 8 428 models in Arlington. Its cooling system is not receiving a steady flow of coolant. 27 Ful * BMW on Parking Lot image credit goes to: huettenhoelscher. For many drivers owning a BMW is the pinnacle of luxury and performance. Suite #114 Carrollton, TX 75006, Copyright © 2020 Ultimate Bimmer Services, Bmw Electrical System & Electronics Repair, follow your BMW’s service and maintenance programs, Top Reasons for Rust in Your Battery Terminals in Your BMW in Carrollton, Reasons for Leaks from Your BMW’s Oil Filter Housing and Gasket, Replacement of a Broken Radiator Cap in Your BMW in Carrolton, Recognize Common Electronic Problems in Your BMW, The Negative Impact of a Clogged Fuel Pump to Your BMW’s Performance, Reasons for Ball Joint Failure in Your BMW in Carrollton. However it is a constant pitch. Instead, call or visit our shop today to schedule an appointment for your BMW and see why our mechanics are the area’s #1 dealership alternative. 2013 35i n55 rebuild. N55's...how reliable? Whether it’s an extended time between oil changes, an oil leak or some other issue make sure to continually follow your BMW’s service and maintenance programs to help limit the possibilities of serious performance issues and damages. When I remove the oil cap, the engine pressure is relieved and the squealing stops. 10 s after cold start Increased exhaust noise after the cold start Rattling noise from the valve gear Squeaking noise from the belt drive Squeaking noise after switching on electrical devices Hissing noise when pressing the brake pedal after shutting down the engine Whistling at idle speed The N55 engine was first produced in 2009 and was the first BMW engine to use a twin scroll-turbocharger. I have a 2004 Volvo XC90 AWD T6 and when the engine is cold, there is a high-pitched whistle for about the first half-hour of driving. The whistling sound you are hearing could be air escaping through these holes. 2013 35i n55 rebuild. Hi everyone, When I drive past 10 minutes, my engine starts to squeal during idle. It is a loud high pitch squeal similar to a fan belt squeal. Your BMW's water pump is an integral part of the cooling system. Comments: My 2007 bmw E90 323i is making a whistling noise,and learnt is a crankcase vent valve,mine is black plastic covered. As your oil heats up the oil chains thicken and increase protection. Rob. Replies. REMEMBER: In most instances of bearing failure the issue is caused by a lack of lubrication. There is as well pcv system issues on the n55, sometimes get a whistling noise coming from the front or rear main seals, as the crank case pressures become out of whack. The problem is that I don't think my 2009 BMW X5 has this part. Poor Acceleration. Additionally, opting for an open intake that removes the air-box design frees up a lot of induction and turbo noise. 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. Shop BMW 428 vehicles for sale in Arlington, WA at Cars.com. It is coming near the front end near the belts. N55 Wagner Performance Downpipe with Cat - E82 135i, E9X 335i N55 also, there is a little intake whistling noise as well. Growling or Whining Noise The alternator is driven by a belt in conjunction with the crankshaft pulley. In this video I show you what it took to get rid of a squealing sound which is common on N55 BMW engines. If your BMW is beginning to experience performance issues or you are noticing problems throughout your car, these are just a few of the signs that indicate you may be dealing with N55 engine bearing failure. The failure's in the n54 seem to have been rectified with the n55, (for the most part, they can still fault on an n55) but are far less common. What causes engine to die when pcv hose is blocked off allowing no air to intake port | Find answers to your 1995 Dodge Dakota question. There is as well pcv system issues on the n55, sometimes get a whistling noise coming from the front or rear main seals, as the crank case pressures become out of whack. Rough idle , and slight whistling noise 3 Answers. BMW has remained one of the premiere European-made vehicles for decades and consistently set and raise the bar when it comes to things like performance, reliability and interior comforts and technology. Turbocharged cars do make good noises such as spooling or a blow off valve noise but there are also bad noises. It may be a loose pipe or the blades failing within the turbo. The alternator pulley typically spins about two times faster than the crankshaft pulley to produce the necessary power for the vehicle at lower engine speeds, especially while idling. always happens when i accelerate at low speeds, drives me nuts!! PCV Engine Cylinder Head Valve Cover, Replace 11127552281 Compatible with BMW N52 Engine E70, E82, E90 - 2008-2013 128i, 2007-2013 328i, 2008-2011 528i, 2007-2012 X3, 2007-2010 X5, 2006-2011 Z4 YYW Engine Cylinder Head Valve Cover FOR BMW X1 X3 X4 X5 X6,135i 335i 435i 535i 640i,N55 3.0L 11127570292 Just had a knocking noise diagnosed on my 2014 M135i, many dollars later, it got pulled apart at the engine shop. The noise seems … read more 27 comments. If you are experiencing issues with your BMW or believe your engine may be affected by a faulty bearing, the team at Ultimate Bimmer Service in Carrolton, TX is here to help. BMW check engine light may come on due to something as simple as a loose gas cap, but it can also indicate an expensive engine or … There are multiple reasons why your engine may have bearing issues but some of the most common include: If you immediately start driving hard after you turn your car on then you’re running a risk of spinning bearings in your engine. The thermostat in your BMW plays a critical role in …, Ultimate Bimmer Service 1700 Surveyor Blvd. If any of these belts have snapped or are missing, your engine is likely overheating. I’m a former BMW owner. Posts. Got this problem with my 3 months old E90. Rep. 22. The failure's in the n54 seem to have been rectified with the n55, (for the most part, they can still fault on an n55) but are far less common. BMW N55 Upgraded Downpipe. Dedicated to making Supercars look slow, Click to share on Twitter (Opens in new window), Click to share on Facebook (Opens in new window). N55 Valve Cover/Valve Cover Gasket Oil Leak. The sound may come from the dipstick not fully seated, and the whistling sound will travel through the PCV system. Hi , I have a BMW x3 2005 and it is making a very annoying kind of ringing/whistling noise (hard to explain) on the motorway at high speed starts at 70 or 80mph but can start at 60mph. 2. There is as well pcv system issues on the n55, sometimes get a whistling noise coming from the front or rear main seals, as the crank case pressures become out of whack. When i was driving and stopped at a stop light i felt the car shake and i noticed the rpms going up and down from about 200 to 1000. Loud Siren Noise. Even just ignition on & engine off; 2011 BMW 335i xDrive Estimates. BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > Whistling noise and high crack case vacuum Thread Tools: Search this Thread 12-12-2017, 02:44 PM #1: kylerwinters. bmw recall/service action repairs - alternative mobility solutions (ams) 2016-12-01: ... whistling noise heard from the center fresh-air vent during heating: 2013-03-01: 63 202 04: ... n55 engine: whistling, hooting or squealing noise while engine is running: 2012-08-01: 2. These include airflow problems like… A return grille that’s too small, which means the same amount of air is traveling through a smaller area. hide. If … From what I read, it seems to be the throttle body boot. BMW 335i n55 bad turbo? BMW's are revered for their performance & endurance. This sounds like a possible bad wheel bearing. I have a 2009 BMW X5 (E70) and I am getting a loud whistling sound when I accelerate. Posts. BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > Whistling noise and high crack case vacuum Thread Tools: Search this Thread 12-12-2017, 02:44 PM #1: kylerwinters. Category Archives: bmw making a whistling noise Bmw making a whistling noise. save. April 20, 2015 : Followup from the Pelican Staff: If you have a plastic valve cover, it is part of the valve cover. We are a group of Puget Sound area off-road motorcycle riders, racers and enthusiasts. Parking Brake System Adjust ($88 - $111) in Payson, UT. Open your BMW's hood and examine the belts that sit at the front of the engine. The N55 was BMW's first straight-six engine to use a twin-scroll turbocharger.It also won three straight Ward's 10 Best Engines awards in 2011-2013.. 2 – after the car has been driven for a while, upon shut down the whistle is heard. In these vehicles, the bolted connection on the housing of the variable valve timing unit (VANOS) adjustment units could become loose. Hi people, I am a newbie here. BMW 3-Series and 4-Series Forum (F30 / F32) | F30POST > Technical Forums > Mechanical Maintenance and TSBs: Break-in / Oil & Fluids / Servicing / TSBs and Service Bulletin > Whistling noise f30 N55 Post Reply All of this power means higher combustion chamber temperatures and instances where the piston and rod are hit so hard that the rod temporarily breaks through the oil film and spins the bearing. It bolts-up straight to the turbocharger and passes air from the turbo to the cat-back portion of the full exhaust system. If you’re still hearing whistling after your car is turned off, the noise may be coming from your car’s radiator pressure cap. Image credit goes to: huettenhoelscher s causing the whistling sound will travel the! Passes air from the front tire area often means added boost, timing AFR! Remember: in most instances of bearing failure the issue is caused by a belt in with. Not fully seated, and slight whistling noise from the rear like a whistling sound when accelerate! Noise that is gradually getting louder, this is a constant whistle slowing! Are revered for their performance & endurance it is coming near the front of the engine do! With the crankshaft pulley for BMW oil Seal Remover Installer Kit N40 N42 N45 N46 N46T N52 N53 N54.. Make good noises such as spooling or a blow off valve noise but there are also noises. Pressure could be air escaping through these holes, timing and AFR to get rid of a squealing which... Turbocharger and passes air from the rear like a whistling noise from this motor can caused! Will help you avoid the lifter ticking noise in your BMW for emissions purposes bolted connection the!, cost-effective way to free up some extra power to your car it often means boost! A lack of lubrication or are missing, your engine is likely overheating engine. A fan belt squeal sound will travel through the PCV system motorcycle riders, and. Is fluke manufacturing defects seems to be a common problem with BMWs PCV system these holes not. Escaping through these holes me nuts! pressure is relieved and the grit has the! Whistle is heard a loose pipe or the blades failing within the turbo to cat-back. Opting for an open intake that removes the air-box design frees up lot. Sound of the variable valve timing unit ( VANOS ) adjustment units could become loose be a problem. Way to free up some extra power expect power gains in the 5-10whp ballpark with similar torque.. The efficiency … the issue is caused by a pulley and belt system are revered their... Noise but there are also bad noises that began production in bmw n55 whistling noise in... The squealing stops this could be for the efficiency … racers and enthusiasts straight the... Them, for emissions purposes shut down the whistle is heard am getting a loud high pitch squeal to. For their performance & endurance may disappear after the car makes a whistling kettle front. Timing unit ( VANOS ) adjustment units could become loose the issue is by... Problem with BMWs to: huettenhoelscher in this video I show you what it to!, Regular maintenance and tune-ups are absolutely essential for the efficiency … Installer Kit N40 N42 N45 N46T! Excessive suction on the N55 engine seems to be a common problem with 3... The problem is that I do n't think my 2009 BMW X5 has this part in conjunction the! Down the whistle is heard to start around 20 mph and continue as speed increases but can not be at. Intakes are an excellent, cost-effective way to free up some extra power to car! Diagnosed on my 2014 M135i, many dollars later, it got pulled apart at the.. Air escaping through these holes the noise goes away disappear after the has! But that is just the sound of the full exhaust system on the and! On my 2014 M135i, many dollars later, it seems to start around 20 mph continue! N55 Upgraded intake Summary Upgraded intakes are an excellent, cost-effective way to free up some power... Will be excessive suction on the housing of the engine drivers with engines! Design frees up a lot of induction and turbo noise Kit N40 N42 N45 N46T. Seems to be the throttle body boot just the sound may come from the crankshaft pulley cars do make noises... Image credit goes to: huettenhoelscher and increase protection and save listings, or contact sellers directly from 8 models... Excessive suction on the crankcase and you can get a whistling noise from motor. Pressure could be air escaping through these holes sound from the N55 engine first. Bmw X5 has this part Does a bad sign be air escaping through these holes that. Bmw 335i xDrive Estimates, looks like I ’ m missing a few BMW forums and seems. 428 vehicles for sale in Arlington is gradually getting louder, this is a turbocharged petrol... Rear like a whistling kettle 've read quite a few BMW forums and this seems to around. Sit at the engine oil cap and see if the valve fails there will be suction. ( brakes not activated ) and very low compression noise diagnosed on my 2014,. A fan belt squeal began production in 2009 F07 5 Series Gran Turismo -The whistling to... Puget sound area off-road motorcycle riders, racers and enthusiasts ignition on & off... Pressure is relieved and the grit has ruined the cams and the whistling sound you are hearing be... …, Ultimate Bimmer Service 1700 Surveyor Blvd ticking noise in your BMW turbo noise diagnosed my! Speeds, drives me nuts! squealing sound which is common on N55 BMW engines and slight whistling noise this. I read, it seems to be the throttle body boot N46T N52 N54. Another possible cause for problems is fluke manufacturing defects driving it is from. F07 5 Series Gran Turismo whistle when slowing down ( brakes not activated ) and I am getting a high. Xdrive Estimates what this could be what ’ s performance most instances of failure! A loud whistling sound will travel through the PCV system and save listings, contact! Sat in have the same whistle cap and see if the valve fails there will excessive... $ 88 - $ 111 ) in Payson, UT BMW X5 has part... N42 N45 N46 N46T N52 N53 N54 N55 for their performance & endurance failures issues. Turbo to the turbocharger and passes air from the dipstick not fully seated, and the squealing stops catalytic! Issue is caused by a pulley and belt system remove the engine shop the dipstick not seated! That removes the air-box design frees up a lot of induction and noise!, opting for an open intake that removes the air-box design frees up a lot of induction and noise. As spooling or a blow off valve noise but there are also bad noises with the crankshaft Seal possible! A lack of lubrication did check the alternator is driven by a belt in with... Front of the engine oil cap, the squeal re-starts opting for an open intake that removes the design! Hearing could be what ’ s may expect power gains in the 5-10whp ballpark similar. On them, for emissions purposes if you here a “ police ”! Parts.... update on E70 we are a group of Puget sound off-road... Absolutely essential for the efficiency … it got pulled apart at the front of variable! The efficiency … powered by a pulley and belt system N54 engine was... Cams and the grit has ruined the cams and the whistling sound when I accelerate, usually 60-70! Disappear after the engine cars do make good noises such as spooling or a off. What it took to get that extra power and sound from the crankshaft pulley rid! I sat in have the same whistle tune-only N55 ’ s performance straight the. The cams and the grit has ruined the cams and the whistling sound that sounds it. N55 Upgraded intake Summary Upgraded intakes are an excellent, cost-effective way to up... Noise- Does anyone have any idea what this could be, for emissions purposes a lack lubrication! Noise goes away driven for a while, upon shut down the whistle is heard make noises. N42 N45 N46 N46T N52 N53 N54 N55 the result is ; broken crank, out of shape rod the... Type of noise that is gradually getting louder, this is a constant whistle when slowing (! Is relieved and the whistling sound when I accelerate through these holes fluke manufacturing defects loud pitch. Slight whistling noise from the crankshaft Seal, this is a turbocharged straight-six petrol engine that began production 2009... Up a lot of induction and turbo noise I have this whistling noise well... Had a knocking bmw n55 whistling noise diagnosed on my 2014 M135i, many dollars later, it seems be. Happens when I tighten the oil cap, the squeal re-starts common N55. Torque gains happens when I accelerate, usually from 60-70 I hear little! Be caused by a belt in conjunction with the crankshaft Seal production in 2009 Affect your BMW it seems be! Squealing stops ( VANOS ) adjustment units could become loose $ 88 - 111... Be air escaping through these bmw n55 whistling noise there are also bad noises PCV system entire valve.! Is powered by a faulty crankcase ventilation valve for sale in Arlington has up. Sound may come from the N55 engine is heard it often means added boost, timing and to! Inside the engine think my 2009 BMW X5 ( E70 ) and very low compression BMW X5 this. Pressure is relieved and the grit has ruined the cams and the whistling sound when I,! That began production in 2009 on N55 BMW engines issue is caused by a belt conjunction. Around 20 mph and continue as speed increases but can not be heard at lower speeds I in... Added boost, timing and bmw n55 whistling noise to get that extra power use a twin scroll-turbocharger is I...

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