It has the same police siren sound starting around 1250rpm then disapearing at very high pitch at around 2500/3000rpm then coming back when releasing throtle or when shifting gears at low revs. Order yours today! Also, if the sound isn’t necessarily new, cars with turbos will whistle when they accelerate as the turbo spools up. Figure 1 is a typical turbo compressor map. What happens if the turbo goes? Wanting to join the rest of our members? But i also don't want to waste money if it is a normal problem. I've had a few turbo diesels in the past and never had this.. it's not the usual high pitch whistle when the turbo kicks in.. it sounds more like when you blow over the top of … I have changed the Turbo and the whistle is still there when the engine is reved up. hope is not the turbo that causing all this. I'm going to check the hoses when i have lunch i think. one thing that would help prevent premature turbo failure is to let it idle when you finish your journey and not turn off the engine straight away, as this will give the turbo time to slow down, most people i know dont bother doing this but it could result in premature turbo failure. Tweet Pin It. my tdi does the same. Mine has a whistle on a cold morning at low revs, then it goes away when driving. Dont drive it if this happens. He said that it is a turbo problem. if so this will be cause of whistling. It has done for the 24k I've done in it. My turbo also whistle a lot. Does the turbine break up destroying the engine and exhaust? You can hear it best when at low revs with the windows down and then accelerate and lift off. Newer cars don't seem to whistle that often, but some do. Hello everyone, I have a really annoying issue with my car and was wondering if anyone could give me some advice. Turbo noise seems to be a contender. (You must log in or sign up to reply here.). Our community has been around for many years and pride ourselves on offering unbiased, critical discussion among people of all different backgrounds. still reckon nothing to worry about, but is you are concerned take it to a tuners and ge them to listen to it, they are used to noisy turbos performance motors etc. Just noticed your said it happens when you aint on the throttle. Or does it just seize? I wouldnt worry about the whistling. My turbo has been making a whistle noise when sat at idle and revs to 1.5k. My car has 96k on it and whistles alot. actually, it was the tuners who heard this noise first, and told me to get t checked. Written By Dan. it's pretty standard besides from the ECU remap. Low mileage, quite young. You should hear a pitch increase … The whistle haven't changed at … By continuing to use this site, you are agreeing to our use of cookies. I'm getting a whistling sound at low revs, around 1200 - 1800, doesn't matter if i'm on the throttle or not, or accelerating hard or not. Modern turbocharged cars are often designed to have a turbo lag that is virtually non-existent, especially the diesel engines. I have a 2005 Opel Astra Turbo Coupe. very high boost problem at low revs. I didn't know the turbo kicked in at such low rpm. Turbo whine - or more accurately whistle - is not related to engine speed per se but to fuelling/load. If the turbo goes you usually get alot of smoke and almost no power. I've been told by friends it is the turbo, but i'm not sure. May get around 250bhp [:P] Any ideas who can do this around south lincolnshire, or peterborough area? Exclusive uk-mkivs stickers now available from Syco Graphix. I'd prefer to pay hundreds of pounds to get it fixed, than thousands if it blows. as turbo is able to spool freely so wind up and wind down more pronounced. But now im noting a problem with a sort of juddering/hesitation at low revs and a faint turbo whistle. The turbo will be fine he says until you start seeing lots of smoke or more sounds. IMO i think it is an awsome sound! Basically, I had my car remapped a few months ago - car much better, more responsive, tourquer, faster etc. About the Author. Whistle at those revs isn't abnormal. my brother's '12 tdi does the same. Mine seems to make this noise when revving at very low revs 1000-1200rpm then less so after that - way before you would be expecting any kind of whistle from the turbo. it's just the turbo spooling up. Should i do anything now to prevent it going? I am completely new to this- what is a bkd? Wonder if anyone else has or had this.. http://www.jabbasport.com/index.php are local to you, Hello... sorry to bring this up again but my golf gti mkv got similar whistling and siren sound. Still unsure if it's fixed or not, since I still have a similar whistle that goes away when boost gets over about 5 psi. From what I have looked at online and about turbos, in general, it seems to be faulty. Anyway, i was wondering, if your cars are whistling, does it sound like a police siren when you are changing gears? GFB Discussion Paper The Truth About Compressor Surge. BTW it has only just started happening. My mate is a VW licenced tech (top Mechanic), and he managed to cure it by changing thr turbo under warranty. New - mkV TDI MATCH, RCD510   GONE - Genuine R32 Front + Rear Bumpers | Full miltek resonated R32 style exhaust with large bore decat downpipe. The turbo whistle usually goes unnoticed but can become very obvious when the exhaust is leaking . Content on uk-mkivs.net is generated by its users. Jump to Latest Follow 1 - 14 of 14 Posts. i have the siren noise, yes - usually on light throttle. If there is a problem and you spot it early you can have your turbo reconditioned and not risk engine or exhaust damage. Usually a bellows or CAC leak will affect boost at least a little. O. omaro ... And new turbo started to whistle now. I have a mercedes E320 CDI, when the car is stationary and I rev the engine there is a whistle coming from the turbo area. Just want to be safe, and not pay thousands later. Jump to Latest Follow 1 - 2 of 2 Posts. There was an a3 1.9 tdi I went to look at once with a 100k on clock, now that had a really loud whistle, audible with the windows up and even at low revs, hpi check showed actual mileage was closer to 180k! I had a similar noise that went from being a high pitched whistle to a gushing blowing whistle. If you can get someone else to turn the key while you look under the car a leak will be very obvious with a cold engine , its something to rule out is all . compressor-surge-1. Turbo whistle is the sound of the compressor inside the turbocharger speeding up (also known as ‘spooling up’, which is why it kicks in at the boost threshold (when the turbo starts to kick in) as you accelerate up the rev range. I have a CRD Limited with 900 miles on the clock. It is not coming from the speakers, and it follows the throttle response perfectly. I didn't know the turbo kicked in at such low rpm. http://www.youtube.c...u/0/sYa7m69VzcI. if it is a siren then sounds like wastegate sticking open, A 2.0 tdi won't have a waste gate, must be a VNT turbo surely. when driven hard the noise evolves from a whistle to a real squeal anywhere beyond 2600rpm as if a belt or pulley is loose. 99 It's really strange as the car is only 3.5years old. The whistling is ok, normally happens when you have done more miles, but i guess because i had the ecu remapped, then this whistle has come earlier. Anyone have a similar experience? Previously the engine used to perform very well, particularly on mountain roads, thanks to it's really impressive boost at low revs. This happens before the turbo even boost's. have some black smoke coming out from the exhaust when i floor it too. and will be able to tell you if ok or not. For a normally working turbo, you should be able to hear the air intake gulp/gush as the turbo spools before it kicks - the spool starts at low revs and increases until you get boost at 'x' number of revs. This is not recommended for shared computers. This is a seat Leon 2.0 TDI reference sport 140. My guess is to adjust the vnt actuator, maybe buy new n75 and vac lines. We are working every day to make sure our community is one of the best. do you have an aftermarket exhaust. I have had it a year and the car is a 65 plate on 29,500 miles and only started to notice it over 2 months ago. The truck has a 4" straight pipe exhaust and an aftermarket turbo so it already has a hell of a whistle. I did some mods like stage1, DV, k&n dropin filter, full 3" catless down pipe. I'm getting a whistling sound at low revs, around 1200 - 1800, doesn't matter if i'm on the throttle or not, or accelerating hard or not. They also lower the LAG prone to the wastegate type turbochargers. The whistle or air noise happens between 1,900 RPMs and 2,200 RPMs like clock work when it's cold. In modern cars, turbo placement and improved sound deadening should generally render the turbo silent or very quiet. iv'e uploaded the video on you tube. I've seen on other threads that it could be the turbo going, but i just want people's opinion. can anyone give me any helpto resolve the problem. people who travelled with me thought it was a siren! Almost as if an emergency vehicle is approaching in the far distance. It makes the noise in synchrony with the engine revving (i.e. i have quite a noticeable whistle and p-chssssst sound with mine which is remapped if thats any comfort, Mine whistles are low speed/rpm, it also has a nice pisssssst too.... youve gotta love a turbo!! Turbos normally do make some noise, so it may be normal. mine used to be the same. I've seen on other threads that it could be the turbo going, but i just want people's opinion. ... Ok it wont be turbo'd. especially decat. Is this a turbocharged model as a turbo charger can make a whistling sound at certain rev's with the engine under slight load and if it is tubo'ed and you have not noticed it before then maybe you should have it checked. Please re-enable javascript to access full functionality. From what i seen of the forums, the older cars with turbos seem to whistle more often. When should you be concerned? losa ... or otherwise, mine on the 2.4 makes a similar noise, which is slightly worse when cold and at low revs, but no grinding noises or significant oil consumption, and it still makes decent power, so I'm not worrying about it. Its a PITA but doesn't effect performance as long as its not pluming thick white smoke out the exhaust. When on the revs and off again? Some car owners even opt for an exhaust turbo whistle that attaches to the end of your exhaust tips. Car Turbo Whistle - Universal Aluminum Car Turbo Sound Whistle Muffler Exhaust Pipe - Blow-off Valve Simulator, for All Vehicles Models - Size L 2.7 out of 5 stars 128 $6.99 $ 6 . You currently have javascript disabled. Do i already need to refurb or replace my turbo? It's a Golf MK5 2.0 TDI (140), chipped to 200bhp. The whistle started quite subtly only whilst the vehicle is moving, generating load and around half throttle just getting on boost. I've been told by friends it is the turbo, but i'm not sure. I also started to loose power on the motorway but was OK around town at low speeds. reason it is audible at stop n go traffic is because the engine sound is quite muted at low revs but the turbo spool is higher pitched and can be heard more easily. Peugeot 307 HDi xsi 136 - 307 HDi low rev stuttering. This site uses cookies. If the turbo is on it's way out, i'm gonna change it for a hybrid [] and a remap. If the noise is not normal, it could be an air leak, or a sign that the turbo is starting to fail. If you can drive a similar car for comparison or have a BMW tech drive your car, it would help you to confirm if you have an unusual noise or not. I've seen this term been used in other threads, and my car does sound like a police siren. Mechanics here says the turbo is dead, we have to change it; which i dont believe because its like this since the new turbo is installed. Most turbo's I've heard have had a slight whistle, but I'm no expert. I know this because I had/have one. It is a 2007, it has only 30k on the clock and has just had a major service with cam belt and water pump. If it's below 35 degrees and I'm doing 70 MPH (2k RPM), it will just whistle steady till the truck either completely warms up or I let off the throttle. Several functions may not work. uk-mkivs.net is an independent Volkswagen enthusiast website owned and operated by VerticalScope Inc. If it was a leak i would have thought i would get a constant whistle throughout the rev band? If I tap the gas pedal the high pitched sound goes away for a second, then comes back. Last edited by Grant L on Tue Sep 29, 2015 6:19 pm, edited 1 time in total. uk-mkivs.net is not in any way affiliated with Volkswagen AG. it's the sound of performance. dealers may not be up to it. Im not an expert on mk5's but there could possibly be a boost leak or a hose seal gone allowing air to escape caussing a whistle/hissing noise. The turbo lag is often reduced by a double turbo set-up. I usually hear it as I'm slowing down and sometimes at idle. It's just started to make this whistling, and i've heard bad stories about turbo's going. He tells me it's definately the turbo. do you mean a siren type noise or a whistle, if it is a siren then sounds like wastegate sticking open. it worried me at the start but after remap i think it is completely normal. to echo the post earlier, it is soooooo important to do the "turbo timer" routine and after any run that has had the engine working make sure the car is run at tick over for 30 secs - 1 min before switch off. I would imagine most of you guys are more familiar with the Vauxhall or Holden badge, but it's the same car with the same Z20LET Turbo Ecotec engine. I've just been to the VW garage and spoke to the mechanic there. Here is a test of the turbo exhaust whistle on my Ford Focus. Do i need someone to keep the revs up when checking the hoses, or will i know if i look under the bonnet? I wasn't sure if it was a diesel engine. ... i have a 04 5.4 new style and mine doesnt whistle. A small leak at the downpipe can cause a whistle under low boost, low RPM, low load conditions. To the turbo, compressor surge is a condition that occurs whenever turbo boost pressure is high and airflow is low. if whistle  nothing to worry about. The past few days I have noticed my '05 6.0 has had a very high pitched whistle. Top I had the main hose from the intercooler to inlet manifold blow open on my old Rover 620d half way through an overtake, going slightly uphill on the A96 once :shock: All the boost went straight to atmosphere with a lot of noise, and the torque dropped to levels reminiscant of a crumby old Renault 21 1.9 naturally aspirated diseasal … The VNT Turbo Vanes will close thereby giving a rapid boost and response time. As you've said check all the pipes and if you're worried have the thing taken off and serviced. When accelerating I can hear the whistle, even with the windows closed, it does sound like a police siren, but it has done that since I bought the car with 126.000 km on the clock, have now done 178.000. BUT, the week after this was done VW brought out a buletin telling dealers this was not necessary in 95% of cases, and that careful tinkering with the exhaust system and air inlet system should be remove the whistling noise. For your own peace of mind speak to a licenced tech at your local dealer. Strange for problems to develope just aftr the warranty finished. Feel free to sign up today Sign up now! Turned out to be a split turbo hose, £37 later and the problem was fixed. Ah well - at least you've found it. For Sale/Wanted - Other Make Cars & Parts. Dan is an automotive journalist and owner of over 10 cars ranging from supercars, tuned cars, classics and your good old beater cars. I've noticed a whistleing sound when the engine is at low revs..