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Exhaust back pressure

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by insanityeight, May 16, 2019.

  1. May 16, 2019 #1
    insanityeight

    insanityeight Light Load Member

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    Jul 26, 2013
    birmingham al
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    Been reading alot amd just curious as to what yall think. Have a paccar mx 13 with certain parts fell off. My exhaust back pressure valve behind turbo is bad and ive ran it with it wired in open position with no noticeable issues. Everything i read leads me to believe back pressure behind turbo is absolutely not needed even on a newer emissions engine. Any thought?? Thanks in advance and happy trucking
     
    insanityeight, May 16, 2019
    insanityeight, May 16, 2019
    #1
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  3. May 16, 2019 #2
    Goodysnap

    Goodysnap Road Train Member

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    Jul 12, 2017
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    The EBP valve on an MX is used for regeneration only to create back pressure which in turn creates heat to maintain and build exhaust temps. It serves no other purpose. Since your DPF fell off.......you dont need it. The BPV valve is needed on any MX engine still meeting emissions compliance.

    ISX uses VGT for back pressure. MX uses the same VGT but only uses the VGT for boost control, not regeneration. MX has a much lower VGT failure rate due to the lower duty cycle. Plus the EGR coolers dont leak coolant and hang up the sliding nozzle ring.
     
    Goodysnap, May 16, 2019
    Goodysnap, May 16, 2019
    #2
    Lookunderthetruck, 650cat425, A5¢ and 4 others Thank this.
  4. May 16, 2019 #3
    insanityeight

    insanityeight Light Load Member

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    Jul 26, 2013
    birmingham al
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    Thanks alot dor the valuable input.
     
    insanityeight, May 16, 2019
    insanityeight, May 16, 2019
    #3
    Goodysnap Thanks this.
  5. Jun 14, 2020 #4
    Rookie o/o

    Rookie o/o Bobtail Member

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    Jun 14, 2020
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    When you say the bpv valve is bad, is it leaking mine is. And how do you wire it open? Thanks
     
    Rookie o/o, Jun 14, 2020
    Rookie o/o, Jun 14, 2020
    #4
  7. Apr 25, 2024 #5
    Mountainman82

    Mountainman82 Bobtail Member

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    Sep 15, 2021
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    Does anyone know how much back pressure a MX13 can handle?
     
    Mountainman82, Apr 25, 2024
    Mountainman82, Apr 25, 2024
    #5
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