Weird turbo noise help

[Obeynation]

My Audi is making super weird noise I did change the turbo so maybe something isn't connected right ? I really don't know here's a short clip

https://youtu.be/LkNOoysyQLo




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[Obeynation]

My Audi is making super weird noise I did change the turbo so maybe something isn't connected right ? I really don't know here's a short clip , also found this loose but idk what it is

https://youtu.be/LkNOoysyQLo




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Sent from my iPhone using Audizine

[Hunter2011]

Sounds like a waste gate or diverter valve issue. Have you got any check engine lights or does it feel like the car has lost power?

[blbroo]

My Audi is making super weird noise I did change the turbo so maybe something isn't connected right ? I really don't know here's a short clip

https://youtu.be/LkNOoysyQLo




Sent from my iPhone using Audizine

I think that is your diverter valve. Make sure it's plugged in all the way. My plug was bad and slipped loose a few times and it sounded exactly like this.

[NathanGreatScott]

If you're talking about the airy-chatter sound when you let off, it's almost def the DV. My buddy's mazdaspeed sounded exactly like this. Some people have told me it's no big deal, but others have said it's bad for the turbo because the DV is not opening correctly. Do you have a larger turbo on now or any other intake/exhaust parts? Might be why the DV is producing a different sound than before.

[NathanGreatScott]

Also, to be clear, it's not actually the DV that's making that noise, but it is likely causing it. It's called compressor surge. Here is a good write up about it, what it is, and what it does.

http://www.gfb.com.au/tech/tech-arti...mpressor-surge

If your DV is not making a good connection or plugged in the whole way, you're likely fitting into this paragraph:
"The next level down in severity is having no diverter valve of any type. In this case, the turbo will surge every time the throttle is closed if there is boost pressure in the intercooler. These conditions can cause accelerated turbo bearing wear, however in lightly boosted systems this is unlikely to shorten the turbo’s life a great deal – note that diverter valves were not commonly factory-fitted to turbo cars prior to the early ‘90s, and turbos were still considered to have an acceptable life expectancy. Such turbo systems however were generally running relatively low boost pressures, and it would be fair to say that wear would be greater on a more heavily boosted turbo. The lowest level of severity would be cars fitted with a diverter valve that sometimes encounters surge at lower RPM, before the turbo has fully spooled up. In these cases, wear associated with the surge could be considered negligible - other factors such as increased boost or even differences in driving style are more likely to have a greater impact of the overall life-span of such a turbo than low RPM surge."

[Obeynation]

I unplugged and cleaned the contacts on the DV connector and the issue went away somewhat , know there is somewhat to that "compressor surge " I also have a k&n intake installed so that could be why ?


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[NathanGreatScott]

I unplugged and cleaned the contacts on the DV connector and the issue went away somewhat , know there is somewhat to that "compressor surge " I also have a k&n intake installed so that could be why ?


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possibly. I don't think just putting an aftermarket intake on the car would be too much for the factory DV when it's working properly. The DV might just be on it's way out.

[Obeynation]

Ok thank you , also can any one identify what this hose is and is this not plugged in or supposed to be like this


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[JoesB8A4]

DV buddy they go after a while. EASY fix. Believe it's 2-3 bolts tops. Can do with an oil change as you'll have the belly pan off.

[Obeynation]

Here's another video after I cleaned that connector , this seems like a different noise . https://youtu.be/sxyaJZySaWA . But when I go 0-60 it's not too bad . Here's a clip of that as well https://youtu.be/SsSy_vH0tBI . This is my first b8 and your guys help has been amazing . I really would like to donate to this forum as well if there's a way I can thanks all I'm advanced ! Also I have a p2015 and I bought a new intake manifold to fix that but no other codes .


*** UPDATE so I went to check the plug for the DV again and it has oil or something in it so that means bad DV right

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[Obeynation]

Bump


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[NathanGreatScott]

Here's another video after I cleaned that connector , this seems like a different noise . https://youtu.be/sxyaJZySaWA . But when I go 0-60 it's not too bad . Here's a clip of that as well https://youtu.be/SsSy_vH0tBI . This is my first b8 and your guys help has been amazing . I really would like to donate to this forum as well if there's a way I can thanks all I'm advanced ! Also I have a p2015 and I bought a new intake manifold to fix that but no other codes .


*** UPDATE so I went to check the plug for the DV again and it has oil or something in it so that means bad DV right

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Sorry, bro, I can't tell what noise you're talking about in the videos. All I hear is the intake and turbo (and exhaust in the second video) and those sound normal to me. But I don't know what they sounded like before soooo. Actually sounds good, if you ask me. Longer videos and one outside the car near the engine might help us hear what you're referring to.
It does have a little bit of a BOV sound when you let off, which again, could be the DV. I'd go Advanced or Auto Zone and get a replacement, try it, and if it doesn't fix the sounds you're hearing, return it. Or return it regardless and upgrade to an aftermarket one.

[Hunter2011]

Put on a gfb diverter valve.