Why Factory CCV System Becomes a Problem
The CCV system, short for Crankcase Ventilation, is designed to recirculate crankcase vapors back into the intake, which leads to two questions: oil mist recirculation and increased blow-by pressure.
Oil mist recirculation. Over time, that oily vapor coats the intake system, intercooler, and pipes, leading to sludge buildup and reduced airflow. This becomes especially noticeable on tuned or hard-driven trucks.
Increased blow-by pressure. As mileage increases, more crankcase pressure builds up, while the factory system isn’t always efficient at venting it. This can lead to stressed seals and oil being pushed into places it shouldn’t go.
Blow-by pressure: The leakage of combustion gases and fuel-air mixture past piston rings into an engine's crankcase, creating excess pressure. Caused by worn rings, cylinders, or pistons, it reduces engine power and causes oil contamination, high oil consumption, and oil leaks. A small amount is normal, but excessive, forceful pressure indicates serious engine wear or damage.
There’s also the long-term reliability concern. By constantly feeding oil vapor back into the combustion process, you’re introducing contaminants that might affect combustion quality and contribute to carbon buildup.
Common CCV Upgrade Options (And Where Our Kits Fit)
A CCV reroute system typically redirects crankcase gases away from the intake and releases them through a filter or catch can. This is one of the most popular approaches by keeping the intake clean while maintaining proper ventilation.
A more refined version includes an internal and external catch can system, which captures oil particles before the gases are vented. This version keeps your engine bay cleaner and allows you to monitor the amount of blow-by pressure your engine is producing over time.
Our CCV Reroute/Delete kit is designed as a one-stop solution. You can choose from the following 6 options:
| Style | 360-Degree Rotatable Elbow | Regular Elbow |
| CCV reroute + Internal & External Catch Can |  |
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| CCV reroute + Internal Catch Can |  |
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| CCV Reroute |  |
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- CCV reroute + internal & external catch can -- Remove 100% Oil Molecules
- CCV reroute + internal catch can -- Remove 95% Oil Molecules
- CCV reroute only -- Remove 90% Oil Molecules
Why Your CCV Reroute Might Be Leaking Oil
A 2022 F250 owner installed a CCV reroute and noticed oil leaking. What are some possible reasons?
One of the biggest causes is a bad or improperly seated O-ring. The CCV system relies on sealed connections to manage crankcase pressure. If the O-ring is damaged, misaligned, or of low quality, oil vapor and liquid can escape under pressure. This is often overlooked during installation, but it should be the first thing to check.
Another major reason is improper hose routing. If the hose is kinked, overly stretched, or forced into a tight angle, it might restrict flow and create pressure buildup in the CCV system. That pressure will find the weakest point and push oil out, leading to visible leaks. This is where a 360-degree adjustable elbow could make a difference, as it allows for natural routing without stress.
The third common cause is catch can overload or poor ventilation. If the system didn't properly separate and vent crankcase gases, oil might accumulate faster than expected. Once the catch can reaches capacity, oil may start backing up and leaking from fittings or connections.
Final Thoughts
If you’re seeing oil leaks after a CCV reroute, don’t assume the upgrade was a mistake. Instead, look closely at the details—because that’s where the real problem usually is.
Hope this article helps you make up your mind to do a CCV upgrade and clears your doubt on CCV oil leaking issue!
