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DIY: Fix for whistle after adding high flow air filter

Discussion in 'General Tundra Discussion' started by TruckyTruck, Jan 7, 2014.

  1. Jan 7, 2014 at 3:58 PM
    #1
    TruckyTruck

    TruckyTruck [OP] Dumbest Username

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    This is to get rid of the whistle you hear very badly if you have a drop in air filter to the stock air box.

    *Intake gasket w/o screen
    pt# 22271-50050, behind throttle body.
    [​IMG]


    Replacement procedure:
    Remove engine cover.

    Loosen the 2 hose clamps on the connecting tube between the air box and manifold and pull the tube up and out of the way.

    Remove the 4 10mm bolts from the manifold and pull throttle body up out of the way.

    Pull old gasket with screen out, install new gasket.

    Reinstall throttle body, connecting tube and engine cover.
     
  2. Sep 16, 2015 at 8:41 AM
    #2
    csuviper

    csuviper Moderator Staff Member

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    An alternative to purchasing a new part is to cut the screen out of the stock gasket for a little price savings.

    Found some pictures online of the procedure to get to the gasket.

    2a95wdv.jpg

    2zsr0jp.jpg

    2yv2a8p.jpg

    1051njb.jpg

    263htab.jpg
     
    Last edited: Sep 17, 2015
  3. Apr 6, 2017 at 4:35 AM
    #3
    Mark037

    Mark037 New Member

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    Buy the tundra 4.6 throttle body gasket, in 1st picture with 5.7 screened gasket. I tried to saw the screen out of the 5.7 gasket and i promise you it's worth the >10 price tag to just get the 4.6 one. Same diameter amd everything, just no screen.
     
  4. Apr 6, 2017 at 5:22 AM
    #4
    Crewmax Chris

    Crewmax Chris Paper Airplane Enthusiast

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    I just pulled it out, used tin snips to cut out the screen and put it back in. Ten minutes max, no more annoying whistle.
     
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  5. Apr 6, 2017 at 11:11 AM
    #5
    Tundracollector

    Tundracollector New Member

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    I wonder what's the purpose of the screen though? Why did Toyota engineers have a screen there in the first place?

    It doesn't look like it does much in terms of filtration, is it really just there just to make a whistle?

    I would really like to know it's original purpose.
     
  6. Apr 6, 2017 at 11:24 AM
    #6
    csuviper

    csuviper Moderator Staff Member

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    I believe it's there if the mass air flow sensor breaks off. Not 100% though. Weird that here are some models with same engine that don't come with one.
     
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  7. Apr 6, 2017 at 11:40 AM
    #7
    Tundracollector

    Tundracollector New Member

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    Hmm I can see how that would be a purpose for it. I haven't checked if mine has one but I'm pretty sure it does, after installing a trd intake the whistle became really pronounced.

    But honestly I don't mind it at all, I can't really hear it over the radio anyways.

    I wonder if people would complain if that whistle/whine came from a supercharger instead lol :)
     
    Last edited: Jun 27, 2018
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  8. Apr 6, 2017 at 11:45 AM
    #8
    Crewmax Chris

    Crewmax Chris Paper Airplane Enthusiast

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    I know I wouldn't!
     
    Tundracollector likes this.
  9. Apr 6, 2017 at 12:04 PM
    #9
    bsktball55

    bsktball55 New Member

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    I couldn't stand that whistle in my truck before I got rid of the screen, but I am very sensitive to high pitch sounds.
     
  10. Jan 30, 2018 at 7:11 PM
    #10
    Sephirothjx2

    Sephirothjx2 New Member

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    I had a whistle on my 05 after installing a Volant CAI. It only whistled when I was really on it so it wasn't annoying. In fact, I really enjoyed it while accelerating!
    I wonder if my new tundra will do that also when I install a CAI in this one....
     
  11. Jun 18, 2018 at 10:47 PM
    #11
    Jermalex

    Jermalex New Member

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    Truck came with an aftermarket AirRaid intake and throttle body spacer. The whistle was crazy-annoying! Yanked out the TBS hoping it was the culprit...nope.

    Replaced the screen gasket with the plain gasket. Whistle no more, yeah buddy!!!

    Super easy fix. Glad to have found this post.

    Now, just waiting to find a factory air box and get the screen back in there for what ever it protects, hopefully without the whistle.

    Edit:
    Just put in a stock air cleaner assembly. Any one looking for an Airaid intake??? Also put back the “screened” gasket, and with an OEM filter, NO whistle!

    When I dropped in an AFE dry filter, I get an ever so slight whistle. But nothing like with the AirRaid intake.
     
    Last edited: Oct 24, 2018
    Clemsonman14 and csuviper like this.
  12. Jun 19, 2018 at 10:35 PM
    #12
    csuviper

    csuviper Moderator Staff Member

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    Just added protection, not critical.
    Took my screen off and kept it off
     
  13. Jun 20, 2018 at 3:34 AM
    #13
    Rngr188

    Rngr188 New Member

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    Idk, I kinda like the whistle myself.
     
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  14. Jun 23, 2018 at 7:21 AM
    #14
    ballen12

    ballen12 New Member

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    TRD Grill (plus some body-color paint to de-chrome, 20" Raceline Raptor wheels, Nitto Terra Grappler G2s, Leveling kit, Undercover Flex tonneau, Differential Breather mod, K&N performance air filter, Removed air box charcoal filter, replaced throttle body gasket to fix the whistle
    In case anyone finds this thread and wants an instructional video on how to fix the whistle (I even had the whistle before installing a high flow air filter), I made my own!

    https://youtu.be/2V79Q4Gddj4
     
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  15. Jun 23, 2018 at 7:26 AM
    #15
    Rica25

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    Just cut mine out this morning
     
  16. Jun 26, 2018 at 11:03 PM
    #16
    tundrathr0w

    tundrathr0w New Member

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    Does this whistle actually harm anything, or is it just annoying?
     
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  17. Jun 27, 2018 at 6:11 AM
    #17
    Rica25

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    Will not harm anything just annoying
     
  18. Jun 27, 2018 at 1:00 PM
    #18
    ballen12

    ballen12 New Member

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    TRD Grill (plus some body-color paint to de-chrome, 20" Raceline Raptor wheels, Nitto Terra Grappler G2s, Leveling kit, Undercover Flex tonneau, Differential Breather mod, K&N performance air filter, Removed air box charcoal filter, replaced throttle body gasket to fix the whistle
    Agreed. I'm not a mechanic but the louder whistle after adding a performance air filter (and in my case, also removing the charcoal filter) just proves that you're getting more air flowing into your intake but it seems quite harmless to me. Unless you consider your sanity beginning to break down from the annoying whistle...
     
  19. Jun 27, 2018 at 2:12 PM
    #19
    Danimal86

    Danimal86 What's a Dickfir?

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    You know you want the whistle........WOOOOOOO WOOOOOOO
     
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  20. Jun 29, 2018 at 4:28 AM
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    Max Power

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    Ok, I'm wondering if I have the whistle being talked about here. I notice a very subtle, high pitched noise, almost like a dog whistle when I'm accelerating at certain RPM's. If I have the radio on, it's not noticeable. If I have the radio off and listen for it, I can hear it, but like I said, it's very quiet. Is this the same thing that is being talked about in this thread?
     
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  21. Jun 29, 2018 at 5:45 AM
    #21
    tundrathr0w

    tundrathr0w New Member

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    I don't understand- if you "fix" the whistle by cutting out the screen or replacing the part with one that has no screen, doesn't that defeat the purpose of having the screen, to filter out any foreign objects from getting into the engine?

    Are those who "fixed" the whistle not concerned about something getting in there and not getting caught by the screen?
     
  22. Jun 29, 2018 at 6:06 AM
    #22
    Rica25

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    Other engines from Toyota don't have that screen just the 5.7
     
  23. Jul 8, 2018 at 12:39 PM
    #23
    Jermalex

    Jermalex New Member

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    What you describe sounds like what I heard on my truck. After replacing the gasket with a screen-free gasket I still get a very slight, similar-sounding, whistle but only on start up…goes away after 5-10 seconds.

    Toyota P/N 22271-50050 fit my 2011 5.7L (non-flex fuel).
     
  24. Jul 8, 2018 at 1:46 PM
    #24
    landphil

    landphil Socially distant and prone to wandering.

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    That would be your air injection pump that you are hearing.
     
  25. Jul 9, 2018 at 9:22 PM
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    Jermalex

    Jermalex New Member

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    That’s a good little knowledge nugget.
     
  26. Jul 9, 2018 at 9:33 PM
    #26
    TruckyTruck

    TruckyTruck [OP] Dumbest Username

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    The 5.7 in the Sequoia doesn't have the screen. The part number I listed in the first post is for the Sequoia. Same motor though.
     
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  27. Jul 9, 2018 at 9:35 PM
    #27
    TruckyTruck

    TruckyTruck [OP] Dumbest Username

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    Man how time flies... I didn't even remember putting that other gasket on. It's been 4 1/2 years
     
  28. Jul 15, 2018 at 8:34 AM
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    Jesse30002000

    Jesse30002000 New Member

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    Am i crazy or did the sound from my k&n CAI actually get reduced, and kind of contemplating orderi g a gasket with the screen?
     
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  29. Aug 17, 2018 at 4:46 PM
    #29
    MrK

    MrK New Member

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    Could have sworn the high pitched whining was electical. Did this today, and it's easy. No more high pitched whining. Thanks for the how to video.
     
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  30. Feb 24, 2019 at 10:34 AM
    #30
    West Texas Tundra

    West Texas Tundra 2016 Tundra

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    I installed a drop in k&n filter and now have the whistling going on. But the 22271-50050 part number on Amazon says it doesn’t fit my 2016 1794 tundra. Anyone else have this same issue?
     
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