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Exhaust back pressure valve.

Discussion in 'Trucks [ Eighteen Wheelers ]' started by Martin U., Apr 5, 2016.

  1. Apr 5, 2016 #1
    Martin U.

    Martin U. Bobtail Member

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    Anybody know we're the exhaust back pressure valve is located? Is it difficult to replace? Maxxforce 13, 2012 prostar.
     
    Martin U., Apr 5, 2016
    Martin U., Apr 5, 2016
    #1
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  3. Apr 5, 2016 #2
    Heavyd

    Heavyd Road Train Member

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    It is located right after the turbo on the turbo outlet pipe. Yes, it is difficult to replace.
     
    Heavyd, Apr 5, 2016
    Heavyd, Apr 5, 2016
    #2
  4. Apr 5, 2016 #3
    Martin U.

    Martin U. Bobtail Member

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    Why's it so difficult? Sorry I really don't feel like giving international more of my money.
     
    Martin U., Apr 5, 2016
    Martin U., Apr 5, 2016
    #3
  5. Apr 6, 2016 #4
    Heavyd

    Heavyd Road Train Member

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    Accessibility is rough. After treatment injector and oxygen sensor is mounted on this section. Coolant needs to be drained. Coolant should be vacuum filled in these engines to prevent air pockets from getting formed. The pipe is bolted to the turbo housing with several bolts, and like any exhaust related fasteners they tend to seize up which means you need a torch to heat them, or drill out and retap broken bolts. Not a good time. Why are you replacing it?
     
    Heavyd, Apr 6, 2016
    Heavyd, Apr 6, 2016
    #4
    rojan1 Thanks this.
  7. Apr 6, 2016 #5
    Martin U.

    Martin U. Bobtail Member

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    Yeah that sound like some work beyond my capabilities. I've put over 6000 into this truck already. Egr cooler, valve, Dpf bake. The truck wont do passive regens. Light comes on while I'm on the highway and will start blinking with alrm if i dont stop and do parked regen. Every 400 miles roughly. Connected my truck to jpro and it only has a code for "turbo charger outlet pressure above desired- check exhaust back pressure valve"what do you think.
     
    Martin U., Apr 6, 2016
    Martin U., Apr 6, 2016
    #5
  8. Apr 6, 2016 #6
    Heavyd

    Heavyd Road Train Member

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    Turbo charger outlet pressure is basically your exhaust back pressure. When the truck isn't doing regens the exhaust will plug up and cause this code. When you do a DPF bake you also need to remove and clean the DOC, preDOC and after treatment injector. Has any of that been done lately?
     
    Heavyd, Apr 6, 2016
    Heavyd, Apr 6, 2016
    #6
  9. Apr 22, 2016 #7
    Carreras

    Carreras Bobtail Member

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    Apr 22, 2016
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    As heavyd mentioned the turbo outlet psi code is common when dpf is plugged. Does not mean the exhaust valve is faulty. I've experienced some trucks have the clutch switch or brake switch faulty or out of adjustment, not allowing a passive regen. Best thing to do is hook up a scan tool, and monitor these signals along with all regen inhibitors.
     
    Carreras, Apr 22, 2016
    Carreras, Apr 22, 2016
    #7
    RadmanRadman Thanks this.
  10. Jun 13, 2019 #8
    RadmanRadman

    RadmanRadman Bobtail Member

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    Apr 26, 2019
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    Hi Heavyd, roughly what is the price on the back pressure exhaust valve. What does it look like? the parts guys are having a hard time finding it on their system.
     
    RadmanRadman, Jun 13, 2019
    RadmanRadman, Jun 13, 2019
    #8
  11. Jun 13, 2019 #9
    Heavyd

    Heavyd Road Train Member

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    Sorry, I don't have access to pricing. I don't get into giving prices either because it just starts fights and arguments.
     
    Heavyd, Jun 13, 2019
    Heavyd, Jun 13, 2019
    #9
    pushbroom and spsauerland Thank this.
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