F550 diesel loud sucking whistle

Discussion in 'Trucks and Trailers' started by jonlavonne, Jul 3, 2008.

  1. jonlavonne

    jonlavonne LawnSite Member
    Messages: 60

    When accelerating under load at 65-70 mph and 2500 rpm I am getting a loud whistle from the engine. Sounds like near the firewall on passenger side up high. Any thoughts? Seems to run fine otherwise.
     
  2. TXNSLighting

    TXNSLighting LawnSite Fanatic
    from DFW, TX
    Messages: 6,463

    turbo?!!!!!
     
  3. jonlavonne

    jonlavonne LawnSite Member
    Messages: 60

    Man I hope not. I thought it only did it when it was hot but was running empty today and it's only in the low 70's and it did it. Very loud noise!
     
  4. Gravel Rat

    Gravel Rat LawnSite Fanatic
    Messages: 9,544

    What year F-550 ?

    If its a 6.0 turbo whistle is normal and you may not have heard it before because the turbo has been stuck.

    If its a 7.3 maybe the wastegate is not working properly.
     
  5. Merlin300

    Merlin300 LawnSite Member
    from Zone 5
    Messages: 156

    Check all the clamps on the turbo, and intake hoses for the turbo. More than likely you have a loose hose clamp. Seen it a hundred times.
     
  6. Dstosh

    Dstosh LawnSite Senior Member
    Messages: 716

    Probably a broken down pipe. It is the 3' piece of exhaust running right off the turbo.
     
  7. TXNSLighting

    TXNSLighting LawnSite Fanatic
    from DFW, TX
    Messages: 6,463

    3' piece??? thats a huge exaust!
     
  8. jonlavonne

    jonlavonne LawnSite Member
    Messages: 60

    It is a 7.3 and the first year they made the 550. I'll check all the hoses. Thanks!
     
  9. LawnProLandCare

    LawnProLandCare LawnSite Member
    Messages: 33

    6.0's are known for the whistle. go ceheck some vids on youtube.com
     
  10. jonlavonne

    jonlavonne LawnSite Member
    Messages: 60

    Definitely not turbo whine. It's a much deeper sound.
     

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