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Discussion Starter · #1 ·
We have had our XC-90 for two weeks and absolutely love it. There is, however, one problem we have uncovered that needs to be fixed to make the car perfect. On the T-6 models, the only engine noise we have heard is an annoying "whistle" or "squeal" that is produced when you let up on the accelerator. I took the car to our local dealer and their service people said it is the "exhaust from the turbocharger"...air being released from the turbocharger due to the deceleration. They tested some other T-6s and found that they all sound the same and agree that the sound is unusual. I have driven an S-80 T-6 for the past 2 1/2 years and have never heard that type of noise, so it is possible to produce that engine without the "whistle" but, for some reason, it did not happen on the XC-90.<p>My reason for posting this issue is that I hope someone from Volvo engineering in Sweden and/or Volvo dealers will read this and contact the right people at Vovlo to get them to develop a fix (our dealer said they would try as well). The XC-90 is a truly, truly outstanding vehicle--best I've ever driven--and not worthy of this one imperfection!
 

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Re: T-6 turbo exhaust "whistle" problem (ncss)

Yes, this has been an issue for SOME people who own T6s (all T6s do it, though). Eventhough at Volvo they do not classify it as a problem, word is that they are working on a sound-insulating part that would fit and resolve this. <p>The only other Volvo that has ever produced such sound were the 940 Turbos.<p>Yannis
 

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Discussion Starter · #3 ·
Re: T-6 turbo exhaust "whistle" problem (GrecianVolvo)

Yannis,<p>Thanks for the informative post and I hope your sources are correct. Since you seem to be reasonably well plugged in, could you please put something on this board if/when Volvo announces a formal solution to the "whistle"?<p>Regards,<p>ncss
 

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Re: T-6 turbo exhaust "whistle" problem (ncss)

<BLOCKQUOTE>quote:<HR>could you please put something on this board if/when Volvo announces a formal solution to the "whistle"?<p>Regards,<p>ncss<HR></BLOCKQUOTE><p>Naturally!<p><br>Yannis
 

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Re: T-6 turbo exhaust "whistle" problem (ncss)

If anyone else is having the whistling sound on their T6 it’s very important that you complain to your Volvo Dealer. I’ve learned Volvo doesn’t plan on providing a fix for this problem unless they see more customers with this issue. <p>So please contact your dealers service manager and Volvo customer service (1-800-458-1552) so that we can get this defect fixed. Volvo is forwarding all complaints to there engineering department in Sweden.<p>-Matt<br>
 

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Re: T-6 turbo exhaust "whistle" problem (matt2212)

Counterpoint... its not a problem at all, the "turbo noise" is very cool! Many years ago I modified my Eclipse Turbo to increase the sound, by cutting away the air filter can and removing the silencer within it. Result was more intake "turbo noise" and louder blow off sound as well. Only air noise, not mechanical. Very cool, if you're into that sort of thing.<p>Now then, is there a similar path to increasing this noise on Volvo?
 

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Re: T-6 turbo exhaust "whistle" problem (rkuehn)

Rkuehn… I don’t know many people who would pay $45,000 to have the pleasure of listening to this sound:<p><A HREF="http://www.geocities.com/xc901212/xc90.html" TARGET="_blank">http://www.geocities.com/xc901212/xc90.html</a><p>everytime you lift your foot off the accelerator. Maybe Volvo can make it an option on your vehicle. But I don’t want it on mine.<br>
 

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Re: T-6 turbo exhaust "whistle" problem (matt2212)

Yes, I can see how people who buy a mid 40,000 dollar car would not like the whistling noise. I listened to your sound file, and the car(minus the annoying whistle) sounds great, very mean. By the way, this turbo whistle is not the kind most people look for. Sounds more like the engine is gasping for air.
 

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Re: T-6 turbo exhaust "whistle" problem (volvos70turbo)

OK I listened to the file, that noise is really wrong. Sounds to me like it is indeed the blow-off value when you let off the accelerator. (The "good" noise I expected was more a rush of air, your noise is obnoxious.) You're right, Volvo needs to fix that.
 

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Re: T-6 turbo exhaust "whistle" problem (gohode)

Sound appeared the night on our T6, sounds like a siren. Also, occassionally have a thumping sound coming from what seems to be the right front tire area. My wife is taking it to the dealer. T6 is 1 1/2 weeks old.<p>ddes anyone think that the whistle/siren sound will just eventually go away? just wondering.
 

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Re: T-6 turbo exhaust "whistle" problem (matt2212)

<BLOCKQUOTE>quote:<HR>Rkuehn… I don’t know many people who would pay $45,000 to have the pleasure of listening to this sound:<p><A HREF="http://www.geocities.com/xc901212/xc90.html" TARGET="_blank">http://www.geocities.com/xc901212/xc90.html</A><p>everytime you lift your foot off the accelerator. Maybe Volvo can make it an option on your vehicle. But I don’t want it on mine.<br><HR></BLOCKQUOTE><p>That sounds pretty loud. The T6s I have experienced this in, do not sound this loud. I mean, this car sounds like it has asthma and needs a good shot of Predizone!<p>Yannis
 

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Discussion Starter · #13 ·
Re: T-6 turbo exhaust "whistle" problem (matt2212)

Your sound file is similar to the sound we are getting from our XC-90 T-6. As I mentioned on my original post in this thread, I have an S-80 T-6 that is quiet as a mouse so Volvo obviously knows how to build a quiet turbo.<p>Once again, if anyone from Volvo engineering is monitoring this board and thread, we would appreciate it if you could look in to this problem and come up with a solution. Other than this turbo "whistle", you have put together a terrific vehicle!
 

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Discussion Starter · #14 ·
Re: T-6 turbo exhaust "whistle" problem (ncss)

The phone calls to the Volvo customer service line work!<p>I got a phone call today from the service manager at our local dealership. He said that he had been contacted by the "regional engineer" in regards to my call to the Volvo customer service line about the T-6 turbo "whistle". According to the engineer, Volvo is aware of the T-6 turbo "whistle" problem and is "working on it". The service manager said he would hear from the engineer once a solution was developed and would contact me.<p>In order to keep the spotlight on this issue, I would encourage anyone with this problem to call the Volvo customer service line and register that you have the T-6 turbo "whistle" issue. I suspect that the squeakier the wheel, the faster it will get greased.
 

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Re: T-6 turbo exhaust "whistle" problem (ncss)

Just reported this to Volvo and it seems they're very aware of this issue and are working on a resolution..<p>Mine isn't as ignoring as the one depected by the sound file. I can barely hear it, but it is more obvious if I floor the accelerator and quickly release it.
 

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Re: T-6 turbo exhaust "whistle" problem (ncss)

ncss,<p>Did you hear anything from your dealer service regarding the "whistle" problem fixing? Or is there anyone who got your T6 fixed of this problem?<p>
 

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Discussion Starter · #17 ·
Re: T-6 turbo exhaust "whistle" problem (patriot)

No reply yet from my contact in service at the local dealership, but he said he would give me a call once they hear something. I would encourage you to both contact your local dealer AND call the Volvo customer service line to register your issue to keep the pressure on Volvo (squeaky wheel or, in this case, whistling wheel gets the grease). I will let you know when I hear something and would appreciate if you would do so as well.
 

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Re: T-6 turbo exhaust "whistle" problem (ncss)

That does indeed sound like blow off from the turbo system, however it doesn't sound normal. Sounds almost as if there is an actual "leak" in the sytem rather than a healthy re-circulating air bypass. Def. keep updating the boards as to what is done to resolve the problem or if an actual problem is found!<p>My S40 makes a wicked sound from the OEM bypass valve, but not anything like that.
 

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Re: T-6 turbo exhaust "whistle" problem (ncss)

Thanks, ncss. I already addressed this issue to a procudtion manager in Sweden (for military sales) through my sales manager. He was not aware of this issue at that time. I hope that he would tell the factory guys of this problem. <p>I had a test drive a German spec T6; it made the same sound. My manager was very aware of the sound too. Hope that the factory will fix the problem before mine is built (white/taupe) <IMG NAME="icon" SRC="http://********************/smile/emwink.gif" BORDER="0"> <BR><BR>
[Modified by patriot, 2:33 AM 2-4-2003]
 
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