3.3TT Engine Whine

[NOBODY]

2019 GT2 with 56k kms on it. Mostly stock with K&N intakes and som brake and suspension upgrades.

I've had the intakes on for 2 months and everything has been great. Car was in the shop last week to get an interior component replaced under warranty and has since started making an awfully loud whining noise at cold start and during acceleration (very loud in sport mode at 10psi+)

Dealership said it was the BOV, but I know what it usually sounds like and this doesn't seem right to me.
Confirmed all hoses and fittings from the intakes are connected properly and tightened.

Has anyone come across this before?

Video:

 

[Snicklefritz]

that's the cold startup video. can you demonstrate the sport acceleration whine? why only in sport mode?

 

[NOBODY]

that's the cold startup video. can you demonstrate the sport acceleration whine? why only in sport mode?

I'll add a video soon with acceleration whine. I should clarify that it's not just in sport mode, but it's less pronounced in eco and comfort. You really only hear the whine when you get above 2500rpm or 10psi.

 

[Snicklefritz]

turbos coming through the sound system? Ima guessing!

 

[NOBODY]

Highway speed (accelerating from 2k rpm to 3k+ rpm):

Stop and start in the city:

 

[Snicklefritz]

^^that's the kind of sound that wouldn't alarm me if everything was working fine and it had always been there. start and stop video doesn't sound as out of place. but if this sound started up out of nowhere, that would be concerning alright.

what did the mechanics replace in your cabin? what did they have to move around?

 

[NOBODY]

^^that's the kind of sound that wouldn't alarm me if everything was working fine and it had always been there. start and stop video doesn't sound as out of place. but if this sound started up out of nowhere, that would be concerning alright.

what did the mechanics replace in your cabin? what did they have to move around?

They just replaced the HUD. It was previously in for a sun roof replacement as well.

 

[Snicklefritz]

They just replaced the HUD. It was previously in for a sun roof replacement as well.

hud replacement would require the dash to be removed, is that correct? that work could expose all kinds of moving parts I suspect. the timing of your noise can't be a coincidence.

 

[Ohiocruiser]

It sounds like it's coming from the turbo. Make sure all your air intake pipes are secure. I think, when turbo is going bad it sounds different than this.

 

[NOBODY]

It sounds like it's coming from the turbo. Make sure all your air intake pipes are secure. I think, when turbo is going bad it sounds different than this.

Triple checked that all hoses are connected correctly and are secure!

 

[Snowwhite]

check the K&N filters closely. make sure there's no damage to them. otherwise reinstall the stock boxes and see if the noise goes away. definitely sounds like something intake related, even if the hoses and connections are good.

 

[NOBODY]

Im seeing a small amount of leakage from the driverside filter, of the oil or lubricant that comes pre-applied to the filters. It's fairly minimal, but perhaps that's the culprit in some way.

I'm going to try swapping the filters (driver to passenger and vice-versa to see if that does anything.

check the K&N filters closely. make sure there's no damage to them. otherwise reinstall the stock boxes and see if the noise goes away. definitely sounds like something intake related, even if the hoses and connections are good.

 

[NOBODY]

Loosened the brakcets for the driver side filter and heard a metallic rattling. Took it all apart and found a large piece of metal in the filter. Looks like my turbo's fins are bent to hell.

I've had this K&N system installed for 2-months at this point, so I'm bewildered.

Does this piece look like something from within the turbo that failed and then destroyed everything?

 

[Ohiocruiser]

That doesn't look good. Don't know what that piece is, but it looks very expensive unfortunately. That turbo will have to be replaced/rebuilt. And since it's mechanical damage, consider yourself very lucky if you can get it replaced under the warranty.

 

[Snowwhite]

Put the stock intakes and filters back on before you try to claim anything.

 

[bfglitch]

Loosened the brakcets for the driver side filter and heard a metallic rattling. Took it all apart and found a large piece of metal in the filter. Looks like my turbo's fins are bent to hell.

I've had this K&N system installed for 2-months at this point, so I'm bewildered.

Does this piece look like something from within the turbo that failed and then destroyed everything?

That hunk of metal was on the inside of the cone filter???? If so I can't imagine it came from outside of the car otherwise you'd probably have a hole in the filter, unless connections weren't tight. Sounds like something might have happened during the install of the intakes. But yeah those turbos are pretty badly damaged. Obviously some other material has passed through them. Not only will those turbos need to be replaced but there could be damage further down the system, possibly collected in the intercooler, hopefully not further than that.

 

[NOBODY]

Put the stock intakes and filters back on before you try to claim anything.

The dealership already knows my car has aftermarket intakes as it's been to their shop 3 times since for other issues (HUD, sunroof, etc).

I have videos of my car running normally from months ago with them installed and I called them less than 24-hours after picking it up from the appointment when afterwards I heard this sound. I'm so confused as to why they said it was my BOV. I'm not classically a car guy and I had pictures of the turbo after 5 mins of taking the tubing off...

 

[Ohiocruiser]

Try to claim it, and pray for the best. If they know about intakes they can easily deny the claim. Also I would try not driving the car, unless I absolutely have to. And if you do,stay out of the boost. Last thing you want, for some of those fins to break off, and get inside the cylinder. You'll be looking at engine replacement than.

 

[Snicklefritz]

what are the chances that replacing the hud somehow dropped that metal contamination into the intakes? Ima guessing again that they are completely separate systems. therefore this manifesting damage and attending noise is a coincidence of timing with the hud replacement. when the aftermarket intakes were put in, somehow the contamination happened then, and only finally dislodged and got sucked into the turbo. just the driver's side turbo, is that right?

 

[NOBODY]

That hunk of metal was on the inside of the cone filter???? If so I can't imagine it came from outside of the car otherwise you'd probably have a hole in the filter, unless connections weren't tight. Sounds like something might have happened during the install of the intakes. But yeah those turbos are pretty badly damaged. Obviously some other material has passed through them. Not only will those turbos need to be replaced but there could be damage further down the system, possibly collected in the intercooler, hopefully not further

what are the chances that replacing the hud somehow dropped that metal contamination into the intakes? Ima guessing again that they are completely separate systems. therefore this manifesting damage and attending noise is a coincidence of timing with the hud replacement. when the aftermarket intakes were put in, somehow the contamination happened then, and only finally dislodged and got sucked into the turbo. just the driver's side turbo, is that right?

Just the driver's side. I've had the intakes on for two months and have driven the car a lot since then. Usually drive it in Sport mode so I'm engaging the turbos. I've never had the filters off since then.

What are the chances there was a manufacturing defect in the K&N pipes that dislodged over time? There are two sections where plastic pieces thread in and connect to the factory hoses. Both of those threaded areas have some slight peeling and flaking (hard to explain but looks like the threading wasn't perfect from the factory and there are small metal slivers).