Did I blow a turbo?

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Dave1837, Jan 23, 2020.

  1. Dave1837

    Dave1837 Light Load Member

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    I run a 2007 379 short hood with a C15 625 twin. Today I was loaded with 79.5k, climbed a few hills and when I started down a grade I let off the throttle and let the engine brake do its thing. I was in 18th gear around 70 MPH @ 1,500 rpms, then I heard what sounded like a tire blow out that was slapping the fender, then I looked in my mirror and saw literally nothing but grey/white smoke. I immediately threw it in neutral, got off to the shoulder and shut it off. I opened the hood and found no fluids leaking or any soot anywhere on the engine, just smoke still hovering out of the stacks. All my gagues read normal when I was driving, manifold PSI was around 55 while I was climbing the hills, which is where it always has been since I've been driving it. The truck has about 899k on it and the engine was rebuilt at 310k. I asked the mechanic at the shop what his thoughts were and he said he'd get to it when he could...any thoughts?
     
  2. jammer910Z

    jammer910Z Road Train Member

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  3. Dave1837

    Dave1837 Light Load Member

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    Awesome. What are the chances that it damaged the engine do you think?
     
  4. jammer910Z

    jammer910Z Road Train Member

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    Hopefully you got her stopped before the blades shredded and went like shrapnel through the system.
    But, it is what it is.

    Most of us have been there.
     
  5. jammer910Z

    jammer910Z Road Train Member

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    Little chance the "engine" is damaged.
    It's just the extent of the turbo replacement.
    I'm no expert mechanic, but I've seen em pop and shred... and I've seen em let loose and it just be a basic turbo switch.

    Depends on how bad the guts shredded and pulled through.

    I assume you got it stopped pretty quickly and shut her down in a reasonable time.
     
  6. 062

    062 Road Train Member

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    It’s a pretty safe bet you will have to replace both turbo’s.
    I use turbo exchange in concord nc. They are local to me and about the same price as most places.
    @swaan posted about a place but I forgot the name.
     
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  7. marmonman

    marmonman Road Train Member

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    Check your hoses to the after cooler you may have popped one or a clamp
     
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  8. tnevin225

    tnevin225 Road Train Member

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    I blew one just like that on my 06 CAT and it sounds just like a tire blowing out. Would definitely check the boots and clamps first, might just be a cheap fix.
     
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  9. SAR

    SAR Road Train Member

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    ^^^^ I agree
     
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  10. Dave1837

    Dave1837 Light Load Member

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    It's a company truck, they're pretty good about checking over everything it's just that they take their time doing it. Now I'm stuck with a Detroit. I looked at all the boots around the turbos but I didn't notice any that were cracked or damaged, then again I'm not much of a mechanic. I'm guessing both will need replaced if the top turbo blew out? Sending broken fins into the bottom one? Or wouldn't it matter which one
     
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