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Old 05-20-2019, 12:40 PM   #1
kgharrin
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Default 2019 STI - gargle noise when shifting

Hey, friends.

I have a 2019 WR Blue STI. I love it so far (2000 miles)

I notice a noise when shifting under moderate load around 3500 rpm right when I press the clutch. It sounds like a gargle noise similar to what would happen if you kept your foot on the throttle while pressing the clutch. Almost like a blip in engine speed before falling down again.

I was curious so I investigated. If the car is in neutral with the clutch fully released, you can rev the engine and it sounds nice and smooth. Then, keeping the trans in neutral but pressing the clutch and doing the same thing (rev it up to 4000 or so) it had a different sound...the same gargle/raspy noise when it passes through ~3500 rpm as I described before.

Someone else experienced the same thing on a different forum, but it was inconclusive. (https://www.iwsti.com/forums/2015-st...en-shifts.html)
Has anyone experienced this? Any thoughts on the root cause? Its probably not an issue but I'd just like to understand what it is.

For the 2019/RA owners - maybe try this quick test out and let me know what you find.
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Last edited by kgharrin; 05-21-2019 at 01:48 PM.
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Old 05-22-2019, 09:50 PM   #2
CaliKid87
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I have a 2005 wrx sti and I get the same noise. I dont know what the hell that is but it seems common. I will subscribe to hear what others have to say. Good luck man!
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Old 05-23-2019, 10:03 AM   #3
JonnyD91
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Chapter/Region: Tri-State
Location: Central NJ
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Pure red

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Your link above was me. It's definitely an engine noise. I tried to take a video of it but its hard to hear it. Even when normal driving you have to really listen for it. I was coming from a 2010 WRX so I assume its an STI thing. The STI used to have a tube that brought sound from the engine compartment into the cabin. I believe that was removed in 18. My best guess is that it is a combination of the higher flow intake and exhaust.
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Old 05-23-2019, 12:11 PM   #4
kgharrin
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Quote:
Originally Posted by JonnyD91 View Post
Your link above was me. It's definitely an engine noise. I tried to take a video of it but its hard to hear it. Even when normal driving you have to really listen for it. I was coming from a 2010 WRX so I assume its an STI thing. The STI used to have a tube that brought sound from the engine compartment into the cabin. I believe that was removed in 18. My best guess is that it is a combination of the higher flow intake and exhaust.


Yeah, i saw a review video of the 2019 STi and I definitely heard the same noise so it seems to be normal. Once the nameless exhaust comes it should be harder to hear lol.
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Old 05-23-2019, 08:25 PM   #5
SgtSnuggle
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Location: Seattle, WA
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WR Blue

Smile

Just got back from the dealership for this issue.
The service adviser, said it was the bypass valve, and is perfectly normal.

...now I am wondering if there is a better sounding bypass valve to put on instead
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Old 05-26-2019, 08:43 AM   #6
kgharrin
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I am just hesitant because the noise happens when not in boost also. If you just rev it out to 5 (casually) and clutch in, the noise still occurs as the engine speed falls through ~3500. Or, like I said in the original post, if you just do it while in neutral with the clutch in it is very clear and the bypass valve shouldn’t be opening then, right?
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Old 05-28-2019, 02:13 PM   #7
SgtSnuggle
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Your concerns make sense. Might be worth taking it in to have the noise documented if something does go wrong in the future.
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Old 05-28-2019, 05:02 PM   #8
hoepuncher
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I have a 2019 STI and have the same noise
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