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Turbo problem?

Discussion in 'Trucks [ Eighteen Wheelers ]' started by Warpdrvr, Jun 2, 2010.

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  1. Jun 2, 2010 #1
    Warpdrvr

    Warpdrvr Heavy Load Member

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    Oct 16, 2009
    Corona, CA
    0
    Ok, I hope some of you that have more mechanical experience than I do can maybe help me out a little here..I have some symptoms I'll describe, hopefully one or more of you can help me to figure out how to tell the idiots in our shop what the issue is:

    1. Truck has no power. I get passed by everything on the road on a grade, even just a slight one. This condition is worse the higher altitudes I go

    2. Horrible gas mileage for a Volvo. I can't even squeak out 6.0mpg at less than 65 and I think I should be able to..

    3. Bad squealing/squeaking/whistling noise when using the jakes near the top of the RPM range for selected gear

    4. Also same squealing/squeaking/whistling noise when I have to put foot back on gas after said hill. It's getting worse and worse...Happens under load, not when bobtailing or empty trailer.

    I think it may be the turbo acting up, but what do I know..they hired me to drive, not diagnose and fix mechanical issues...maybe one of you mechanically inclined individuals can tell me what my problem may be...

    Thanks to all
     
    Warpdrvr, Jun 2, 2010
    Warpdrvr, Jun 2, 2010
    #1
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  3. Jun 2, 2010 #2
    dmg1029

    dmg1029 Light Load Member

    182
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    Jun 6, 2009
    Coeur d Alene, ID
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    I am no expert.. but if the truck was mine, I would opt for what's called an 'OVERHEAD' or tune up. That will check most things like fuel pressure, valve adjustment, injector inspection/adjustment, turbo inspection, charge air cooler performance, etc etc.. Well worth it and suggested to me every 150K or so.

    I'm sure the experts can add to this and/or correct me if I'm wrong as I am still learning too.

    Also, I'm sure we would like to know the engine you have, etc...
     
    dmg1029, Jun 2, 2010
    dmg1029, Jun 2, 2010
    #2
  4. Jun 2, 2010 #3
    Warpdrvr

    Warpdrvr Heavy Load Member

    758
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    Oct 16, 2009
    Corona, CA
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    Oh, I have an '05 Volvo with the Cummins ISX

    Since it's a company truck, I can't really tell them what to do on it, only tell 'em what's wrong....
     
    Warpdrvr, Jun 2, 2010
    Warpdrvr, Jun 2, 2010
    #3
  5. Jun 2, 2010 #4
    dmg1029

    dmg1029 Light Load Member

    182
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    Jun 6, 2009
    Coeur d Alene, ID
    0
    lets see what the experts say then. I think you did a good job of the symptoms.
     
    dmg1029, Jun 2, 2010
    dmg1029, Jun 2, 2010
    #4
    Warpdrvr Thanks this.
  7. Jun 2, 2010 #5
    Rnz520

    Rnz520 Bobtail Member

    30
    8
    May 4, 2010
    Fredericksburg, VA, USA
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    You might have a possible problem with the EGR valve, which is pretty famous on those engines for going bad. The Overhead and tune up on the ISX is very very easy, sucks you are not allowed to work on it.
     
    Rnz520, Jun 2, 2010
    Rnz520, Jun 2, 2010
    #5
    Warpdrvr Thanks this.
  8. Jun 2, 2010 #6
    Floyd

    Floyd Light Load Member

    163
    25
    Jun 1, 2010
    Central Maine
    0
    I will be the first to admit i'm no professional either!
    But, I like to help when I can.
    Guessing by the noises you hear under the conditions you describe i would look into a couple things.
    Sounds to me like you are hearing high pressure air or possibly gasses escaping through a small hole or holes.
    Simple things first, I would look at all the hoses, clamps, piping, the air/air cooler etc for any leaks. Start at the turbo and visually inspect everything from there to the intake. It is best to pressure test the entire system if you can.
    Another possibility is a broken head bolt. Some of the older Cummins motors had this happen, not sure about the ISX. Busted head bolt lets compression slip out by the head gasket.
    The sound could possibly be the turbo itself. Remove the exhaust and intake from it and check the vanes on the turbine and the compressor wheels. Also check to see if the vanes have been contacting the housing anywhere. Check the radial and axial run-out, making sure the vanes do not contact the housing at any point.
    These are some of the simple things to check.
    Hope this helps and good luck.
    Floyd
     
    Floyd, Jun 2, 2010
    Floyd, Jun 2, 2010
    #6
    Warpdrvr Thanks this.
  9. Jun 2, 2010 #7
    beltrans

    beltrans Medium Load Member

    441
    101
    Nov 26, 2008
    spokane wa
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    If I remember it right one member on this forum had similar problem with his Cummins ISX. Turned out to be a broken stud of an exhaust manifold so that leaking exhaust was making whistling noise. Look for black spots around exhaust ports.
     
    beltrans, Jun 2, 2010
    beltrans, Jun 2, 2010
    #7
    Warpdrvr Thanks this.
  10. Jun 2, 2010 #8
    Warpdrvr

    Warpdrvr Heavy Load Member

    758
    341
    Oct 16, 2009
    Corona, CA
    0
    Wow, so many things to possibly look at/for. I know last time I was complaining about lack of power at altitude, they found some of the air lines needed tightened, but that did not help the whistling noise. It has since gotten worse...I'll try to make the shop understand what to look for, but they are famous for saying "it's fixed" and when we get back out on the road, we find that's not so.....I was trying to get by our main office to have them look at it as they are more on the technical side, but I was dispatched back to my home terminal area where they don't do anything right.....
     
    Warpdrvr, Jun 2, 2010
    Warpdrvr, Jun 2, 2010
    #8
  11. Jun 2, 2010 #9
    last 1

    last 1 Medium Load Member

    439
    184
    Nov 29, 2009
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    sounds like a CAC or intake manifold leak
     
    last 1, Jun 2, 2010
    last 1, Jun 2, 2010
    #9
  12. Jun 2, 2010 #10
    Les2

    Les2 Road Train Member

    5,150
    2,288
    Jul 25, 2008
    kicked back in my lazyboy...
    0
    Stop putting gas in it...:biggrin_25521::biggrin_25522:
     
    Les2, Jun 2, 2010
    Les2, Jun 2, 2010
    #10
    Warpdrvr Thanks this.
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