Squealing at high rpm or jake usage

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Oklahoma1, Jun 18, 2024.

  1. Oklahoma1

    Oklahoma1 Bobtail Member

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    Jun 18, 2024
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    As of a few months ago I got a new truck, 2022 Kenworth T680. It's been a really good rig up until last night I started it up and got this horrible squealing anytime the Jake's were used and it would hit higher rpms or if it was accelerating from 5th to 6th gear. It's never had this problem before but in a ten hour period it just came on suddenly. Any help would be appreciated, thank yall!
     
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  3. The one california kid

    The one california kid Medium Load Member

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    I warned you not to run those jakes at 2am going by my place! Soooo, I found a radio shack (still open what a find!) and i installed a little high pitched whistler doodad down there underneath all those wires -n stuff! LoL honestly though that sounds like maybe an air hose has a small pinhole in it somewhere, and it's so small it only opens up and whines like that when there's enough pressure going thru the line. If that makes any sense to ys. And I'm not sure how you could test that theory .
     
  4. ‘Olhand

    ‘Olhand Cantankerous Crusty

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    Is it a squel? Like a belt
    Or a whine like air??
     
  5. Big Road Skateboard

    Big Road Skateboard Road Train Member

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    Probably a boost leak. Check your hoses and clamps from the turbo to CAC and CAC to intake
     
  6. Heavyd

    Heavyd Road Train Member

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    Turbo flange or exhaust leak.
     
  7. Oklahoma1

    Oklahoma1 Bobtail Member

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    Jun 18, 2024
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    Thank ya! I reckon I might try to run a bit of soap over when its goin so I can have a bit of a bubble form, I reckon itd be worth a shot.
     
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  8. Oklahoma1

    Oklahoma1 Bobtail Member

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    Jun 18, 2024
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    At first I thought it was a belt so I've kept an eye on it but now I'm not too sure because for the few seconds in the beginning its sounding like metal on metal but I know it cant be the case, maybe air from some sorta blowback maybe?
     
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  9. Oklahoma1

    Oklahoma1 Bobtail Member

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    Jun 18, 2024
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    Thank you I'll definitely check this to make sure they're sealed down tight!
     
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