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Thread: CCV Reroute - Bad Idea?

  1. Top Of Page | #1
    OverkillNeverFails's Avatar

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    CCV Reroute - Bad Idea?

    I did the CCV reroute last Thursday on my 2011 3500. Also installed my new DRD tune with the MM3. I wanted to talk about my observations with the reroute and see what y’all think about it.

    On the MM3 I can monitor crankcase pressure. First, I never monitored the CC pressure prior to the reroute, so I don’t know what the reading was before any work was done.

    I removed the huge CCV filter and gutted it. Using a power scraper, I was able to get every last bit of filter media and glue off of the upper half of the filter assembly. Then I re-installed that bare upper half and bolted the cover back on. Next I clamped a 6ft 3/4” hose to the outlet and ran it down to the frame, just under the passenger door. Also plugged the inlet down by the turbo.

    So, with this reroute installed, the MM3 CC pressure reads 37psi at idle. Then drops down towards 0-2 psi as I accelerate. The 37 psi reading at idle makes me feel uneasy. Like something just isn’t working right. SO, tonight I unrouted the reroute and put it back to factory CCV with a brand new Fleetguard CCV filter.

    Fired up the truck and immediately found that CC pressure on the MM3 is now at 0.4 psi at idle. Seems to indicate to me, that something just doesn’t work right when the intake system is not creating some suction on the CCV.

    Id love to hear some thoughts on this.

    I'm out. Switched back to gas!


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  3. Top Of Page | #2
    74Beeper's Avatar

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    CCV Reroute - Bad Idea?

    Quote Originally Posted by OverkillNeverFails View Post
    I did the CCV reroute last Thursday on my 2011 3500. Also installed my new DRD tune with the MM3. I wanted to talk about my observations with the reroute and see what y’all think about it.

    On the MM3 I can monitor crankcase pressure. First, I never monitored the CC pressure prior to the reroute, so I don’t know what the reading was before any work was done.

    I removed the huge CCV filter and gutted it. Using a power scraper, I was able to get every last bit of filter media and glue off of the upper half of the filter assembly. Then I re-installed that bare upper half and bolted the cover back on. Next I clamped a 6ft 3/4” hose to the outlet and ran it down to the frame, just under the passenger door. Also plugged the inlet down by the turbo.

    So, with this reroute installed, the MM3 CC pressure reads 37psi at idle. Then drops down towards 0-2 psi as I accelerate. The 37 psi reading at idle makes me feel uneasy. Like something just isn’t working right. SO, tonight I unrouted the reroute and put it back to factory CCV with a brand new Fleetguard CCV filter.

    Fired up the truck and immediately found that CC pressure on the MM3 is now at 0.4 psi at idle. Seems to indicate to me, that something just doesn’t work right when the intake system is not creating some suction on the CCV.

    Id love to hear some thoughts on this.
    Usually crankcase “pressure” is measured in inH2O (inches of water) and not PSI.... That being said, 37 inH2O is only 1.34 PSI.

    I find it very hard to believe you have 37 PSI of crankcase pressure at idle. You’d be blowing crap all over if there was that much pressure in your crankcase. Plus you would be throwing a plugged CCV filter code.

    I’m not sure how the MM3 displays crankcase pressure. If someone can chime in and verify what units it displays in that could clear things up. I’m currently in Russia working offshore and don’t have access to my MM3 to look.


    Sent from my iPhone using Tapatalk

    2017 Laramie Schlonghorn 2500, 4" coil spring, tubular radius arm Superlift, Sota REPR 20x10 -19 offset wheels, 35x13.50 Toyo Open Country R/T tires.. RaceME MM3 tuning by Double R Diesel, 5" Flo-Pro TBE no muffler, HPP EGR delete, GDP Mega-Flo Billet Throttle Valve Delete Airaid dry filter w/smooth inlet tube
    1974 Plymouth Roadrunner, 440ci R3 Siamese bore small block (700hp) Faceplated TKO 600 5 speed, Dana 60 with 4.56 gears
    1979 Lil Red Express (Currently doing a 12 valve Cummins swap)


  4. Top Of Page | #3
    OverkillNeverFails's Avatar

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    CCV Reroute - Bad Idea?

    Excellent point. Double checked this morning. My MM3 displays the CC pressure as “psi”.

    I'm out. Switched back to gas!


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  6. Top Of Page | #4
    74Beeper's Avatar

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    CCV Reroute - Bad Idea?

    Quote Originally Posted by OverkillNeverFails View Post
    Excellent point. Double checked this morning. My MM3 displays the CC pressure as “psi”.
    Something doesn’t seem right. 37psi would shoot your dipstick dang near through the hood plus it would throw that crankcase filter code.


    Sent from my iPhone using Tapatalk

    2017 Laramie Schlonghorn 2500, 4" coil spring, tubular radius arm Superlift, Sota REPR 20x10 -19 offset wheels, 35x13.50 Toyo Open Country R/T tires.. RaceME MM3 tuning by Double R Diesel, 5" Flo-Pro TBE no muffler, HPP EGR delete, GDP Mega-Flo Billet Throttle Valve Delete Airaid dry filter w/smooth inlet tube
    1974 Plymouth Roadrunner, 440ci R3 Siamese bore small block (700hp) Faceplated TKO 600 5 speed, Dana 60 with 4.56 gears
    1979 Lil Red Express (Currently doing a 12 valve Cummins swap)


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  8. Top Of Page | #5
    OneTon's Avatar

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    CCV Reroute - Bad Idea?

    My MM3 will spike at 34 PSI every so often. I also had mine reading 34 PSI with the engine off, but the ignition on. I'm guessing they are just buggy when it comes to crankcase pressure...as previously mentioned, 30+ psi in the crankcase would cause all sorts of issues.

    2015 Ram 3500 CCSB SRW 4x4 G56
    2020 Ram 2500 CCSB 4x4 68RFE

    Never ending project. Always adding something...

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  10. Top Of Page | #6
    74Beeper's Avatar

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    CCV Reroute - Bad Idea?

    Quote Originally Posted by OneTon View Post
    My MM3 will spike at 34 PSI every so often. I also had mine reading 34 PSI with the engine off, but the ignition on. I'm guessing they are just buggy when it comes to crankcase pressure...as previously mentioned, 30+ psi in the crankcase would cause all sorts of issues.
    I wonder if it compensates for atmospheric pressure? If this is actually measuring in inH2O I’ve heard of atmospheric pressure throwing this measurement off.


    Sent from my iPhone using Tapatalk

    2017 Laramie Schlonghorn 2500, 4" coil spring, tubular radius arm Superlift, Sota REPR 20x10 -19 offset wheels, 35x13.50 Toyo Open Country R/T tires.. RaceME MM3 tuning by Double R Diesel, 5" Flo-Pro TBE no muffler, HPP EGR delete, GDP Mega-Flo Billet Throttle Valve Delete Airaid dry filter w/smooth inlet tube
    1974 Plymouth Roadrunner, 440ci R3 Siamese bore small block (700hp) Faceplated TKO 600 5 speed, Dana 60 with 4.56 gears
    1979 Lil Red Express (Currently doing a 12 valve Cummins swap)


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  12. Top Of Page | #7
    OneTon's Avatar

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    CCV Reroute - Bad Idea?

    Quote Originally Posted by 74Beeper View Post
    I wonder if it compensates for atmospheric pressure? If this is actually measuring in inH2O I’ve heard of atmospheric pressure throwing this measurement off.


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    Hard to say on that. Maybe Ray @Double R Diesel has an idea.

    2015 Ram 3500 CCSB SRW 4x4 G56
    2020 Ram 2500 CCSB 4x4 68RFE

    Never ending project. Always adding something...

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  14. Top Of Page | #8
    DRD's Avatar

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    CCV Reroute - Bad Idea?

    Quote Originally Posted by OneTon View Post
    Hard to say on that. Maybe Ray @Double R Diesel has an idea.
    I have discovered that the MM3 does not read crankcase pressure correctly. If crankcase pressure was truly 30 plus psi, every seal in the engine would be leaking oil...so don't bother reading the CCV pressure.

    Ray

    Owner and Calibration Specialist
    Double R Diesel
    www.doublerdiesel.com
    info@doublerdiesel.com

    The Cummins Whisperer! John 3:16, Romans 10:9-10...Tuning for the Heart and Soul.


  15. Top Of Page | #9
    OverkillNeverFails's Avatar

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    CCV Reroute - Bad Idea?

    Thanks for the info Ray. I was going to post your response to my email but you beat me to it.

    I'm out. Switched back to gas!


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  17. Top Of Page | #10
    HKBIGDADDYDIESELDAN's Avatar

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    CCV Reroute - Bad Idea?

    Quote Originally Posted by Double R Diesel View Post
    I have discovered that the MM3 does not read crankcase pressure correctly. If crankcase pressure was truly 30 plus psi, every seal in the engine would be leaking oil...so don't bother reading the CCV pressure.

    Ray

    Owner and Calibration Specialist
    Double R Diesel
    www.doublerdiesel.com
    info@doublerdiesel.com
    Once again Ray from DRD always provides the answers and insight

    2012 Cummins Ram 6.7L MM3 tuner full 5" Flo Pro TBE Exhaust LWBCC 4x4 Mag Hytec Double Deep Transmission Pan , Mag Hytec Rear Diff Cover
    Airlift part # 57595 7500lbs airbags ,Nitto Ridge Grapplers 35/12.50/20 on XD 829 Big Hoss ll Satin Black Machined Dark Tint 20 x 9 with + 18 offset rims,MM3 Tuner With full Custom Tunes by Ray at DRD , Autometer A13117 Pillar Pod , Edge 98004 mount adapter , Mag Hytec front diff cover, SuperNova V4 LED Headlight Bulbs

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