4th Gen Engine and Drivetrain-2010 and Up 6.7 liter Engine and Drivetrain discussion only. PLEASE, NO HIGH PERFORMANCE DISCUSSION!

CCV woes....

Old 02-12-2019, 06:33 PM
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CCV woes....

I am getting a CCV pressure fault. (140k miles) Before I drop 120 bucks on this part again, I am wondering if it is even needed. ON the videos and diagrams I have seen with folks removing them, removing the filter media, and then reinstalling in original location. Plumbing a relief hose down the frame to drop oil on the ground. (not a fan of this)

I dont see a need to even keep the CCV filter case in the location. By simply plumbing the vent line from the air intake by the turbo and into an oil catch can or improvised filter can, I believe the job is done. Removing the CCV altogether should not affect the performance or venting of the crank case. I understand currently it is done under light vacuum and any residue gets sucked into the turbo....... blahhhh.... not good.

Under the CCV housing I see two gasket-ed holes, one in one out. Oil in the CCV cover location should be of no consequence. I would love to hear thoughts/ideas.
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Old 02-14-2019, 06:20 AM
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It's only $76 bucks and you only have to do it every 65k miles. I'd leave it.

https://www.genosgarage.com/product/...se-vent-filter
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Old 02-19-2019, 08:10 AM
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Originally Posted by 1-2-3 View Post
It's only $76 bucks and you only have to do it every 65k miles. I'd leave it.

https://www.genosgarage.com/product/...se-vent-filter
Understood. Thanks for the link. But I want to delve deeper into this subject. I am going to beta test the removal. I don't see how it will damage the engine to remove it. I will post my findings.
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Old 02-19-2019, 07:35 PM
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A Cummins Engineer I know says the only concern he would have is the pressure changes and the vacuum. Not sure what he meant but there’s pressure changes. Maybe a sensor ? I thought there was one on newer 6.7’s by the valve cover on passenger side.

Will be interesting to see what your results are.
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Old 02-20-2019, 06:32 AM
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concern he would have is the pressure changes and the vacuum

have you ever sen an older car with the wrong or bad pcv valve? It smokes and belches oil.. The engine cannot be closed. This is the engine vent. If you close it your going to get undsireable results, but it's your truck, you can certainly do what you want.
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Old 02-23-2019, 06:45 AM
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Ok, first couple days, the exiting tube on the cover where it goes into intake near turbo is not sealed. Which will cause oil to spray on the back of the motor. So I opted to open the breather filter, remove the media, and reinstall. I removed the tube from the turbo cut it up high near the valve cover and install a k&n breather filter. Which will still allow the motor to breath. I plugged the intake hole with a rubber cap near the turbo. I then cleared the code and ran it.

Same code popped up. I am assuming the sensor is not liking the fast pressure swings now that the motor is essentially open and not always under a slight vacuum. .... I don't see any gains performance wise. I don't hear any sound difference. There is no oil spray out of my improvised filter setup . and the code won't clear.

My take: the time it took to do this project is gone forever. There is no gain in doing this. I do however recommend getting some kind of a pre filter or catch can for the tube that goes to the turbo. When I removed the intake there was a lot of crud on the turbo vanes.

I am going to buy the replacement filter from the link posted above and call it a day. The cost versus the gains is obvious. Hope this helps.
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