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It got a little cold out and my isx15 is whistling. Is this normal?

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by circle h, Oct 13, 2021.

Page 2 of 2
  1. Oct 14, 2021 #11
    Goodysnap

    Goodysnap Road Train Member

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    Compare it to a known good one or have someone drive it to confirm its normal. Turbo can sound noisy at times and back pressure during idle warm up is normal. Turbo is also used to generate heat for regeneration and engine braking. I would say its normal, but have someone confirm.

    Did you find any leaks? Any other performance complaints, or runs good?
     
    Goodysnap, Oct 14, 2021
    Goodysnap, Oct 14, 2021
    #11
    circle h Thanks this.
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  3. Oct 14, 2021 #12
    circle h

    circle h Light Load Member

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    I found no leaks and it drives perfect. No complaints. It's 12 years newer than the newest truck I ever had before and it is quite smooth and powerful. And the cab is bigger than a Honda civic. I hav a kw w900 and Pete 357 and this new truck is replacing a Pete 379. This cab is enormous in comparison and I don't want to damage it through ignorance, so thank you very much for your time.
     
    circle h, Oct 14, 2021
    circle h, Oct 14, 2021
    #12
    Goodysnap Thanks this.
  4. Oct 22, 2021 #13
    Patriot_Bearing_Supply

    Patriot_Bearing_Supply Bobtail Member

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    Some engines have "warmup valves" that block the exhaust to help heat up the engine at idle. Similar to the kind of things that cars had, back when they had carburetors. When it's on, there is a definite whistle.
     
    Patriot_Bearing_Supply, Oct 22, 2021
    Patriot_Bearing_Supply, Oct 22, 2021
    #13
  5. Oct 22, 2021 #14
    Goodysnap

    Goodysnap Road Train Member

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    ISX engines use the Turbocharger for warm up and regeneration. This may be what the OP is hearing that he is not use too.
     
    Goodysnap, Oct 22, 2021
    Goodysnap, Oct 22, 2021
    #14
    D.Tibbitt Thanks this.
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